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OceanSITES Data Format Reference Manual - Archimer

1. 5 1 Overview 1 1 About OceanSITES The OceanSITES program is the global network of open ocean sustained time series sites called ocean reference stations being implemented by an international partnership of researchers OceanSITES provides fixed point time series of various physical biogeochemical and atmospheric variables at different locations around the globe from the atmosphere and sea surface to the seafloor The program s objective is to build and maintain a multidisciplinary global network for a broad range of research and operational applications including climate carbon and ecosystem variability and forecasting and ocean state validation All OceanSITES data are publicly available More information about the project is available at http www oceansites org 1 2 About this document The main purpose of this document is to specify the format of the files that are used to distribute OceanSITES data and to document the standards used therein This includes naming conventions or taxonomy as well as metadata content Intended users are OceanSITES data providers and users of OceanSITES data 1 3 User Obligations An OceanSITES data provider is expected to read and understand this manual and the NetCDF specification it describes OceanSITES participants are required to submit data in a timely fashion with the understanding that these are the best available versions and may be updated if improved versions become ava
2. If all are point this may be omitted DM_indicator Text Data mode if constant as per reference table 4 See note on data modes below reference_scale Text For some measurements that are provided according to a standard reference scale specify the reference scale with this optional attribute Example ITS 90 PSS 78 sensor_ Text Use thses fields to describe the sensor unless the ancillary variable instrument is used See note on sensor metadata below sensor_mount Text Deployment characteristics from ref table 7 sensor_orientation Text Deployment characteristics from ref table 8 Note on the coordinates attribute There are two methods used to locate data in time and space The preferred method is for the OceanSITES data management User s manual 16 data variable to be declared with dimensions that are coordinate variables e g ATMP TIME DEPTH LATITUDE LONGITUDE Alternatively a variable may be declared with fewer dimensions e g ATMP TIME In the latter case the coordinates attribute of the variable provides the spatiotemporal reference for the data The value of the coordinates attribute is a blank separated list of the names of auxiliary coordinate variables these must exist in the file and their sizes must match a subset of the data variable s dimensions scalar coordinates do so by default The use of coordinate variables as dimensions is preferred because i
3. The global attribute section of a NetCDF file describes the contents of the file overall and allows for data discovery All fields should be human readable and use units that are easy to understand e g time_coverage_duration should be in days for a file that spans more than a month OceanSITES recommends that all of these attributes be used and contain meaningful information unless there are technical reasons rendering this impossible Attributes used by our data inventory system are required and are listed in bold type Global attribute names are case sensitive Attributes are organized by function Discovery and identification Geo spatial temporal Conventions used Publication information and Provenance Attributes that are part of the Attribute Convention for Data Discovery ACDD or Climate and Forecast CF standard or that appear in the NetCDF Users Guide NUG are so indicated as are those that are used by GDAC inventory software OceanSITES data management User s manual 8 Discovery and identification site_code site_code CIS Name of the site within OceanSITES project OceanSITES specific The site codes are available on GDAC ftp servers Required GDAC platform_code platform_code CIS 1 The unique platform code assigned by an OceanSITES OceanSITES specific project Required GDAC data_mode data_mode R Indicates if the file contains real time provisional or delayed OceanSITES specific
4. es data The list of valid data modes is in reference table GDAC title title Real time CIS Mooring Free format text describing the dataset for use by human Temperatures readers Use the file name if in doubt NUG summary summary Oceanographic Longer free format text describing the dataset This attribute mooring data from CIS should allow data discovery for a human reader A paragraph observatory in the Central of up to 100 words is appropriate ACDD Irminger Sea 2005 Measured properties temperature and salinity at ten depth levels naming_ naming_authority OceanSI The organization that manages data set names ACDD authority TES id OS_CIS 1_200502_TS The id and naming_authority attributes are intended to provide a globally unique identification for each dataset The id may be the file name without nc suffix which is designed to be unique ACDD wmo_platform_co wmo_platform_code 48409 WMO World Meteorological Organization identifier OceanSITES specific This platform number is unique within the OceanSITES project source source subsurface Use a term from the SeaVoX Platform Categories L06 list mooring usually one of the Ge moored surface buoy subsurface mooring principal_ principal_investigator Alice Name of the person responsible for the project that produced investigator Juarez the data contained in the file principal_ principal_ Email addr
5. lt A gt lt PARAMs gt sensor_orientation lt A gt Comment or Float lt PARAM gt TIME DEPTH or Float lt PARAM gt TIME standard_name Required if there is an appropriate existing standard name in CF units Required _ FillValue Required coordinates Required if a data variable does not have 4 coordinates in its definition long_name text should be a useful label for the variable QC_indicator OceanSITES specific text ref table 2 processing_level text ref table 3 valid_min Float Minimum value for valid data valid_max Float Maximum value for valid data comment Text useful free format text ancillary_variables Text Other variables associated with lt PARAM e g lt PARAM gt _QC List as space separated string Example TEMP ancillary_variables instrument TEMP_QC TEMP_UNCERTAINTY NOTE no term may appear in the list of ancillary variables that is not the name of a variable in the file history Text A series of entries with one line for each processing step performed on this variable including the date person s name action taken uncertainty Float Overall measurement uncertainty if constant accuracy Float Nominal accuracy of data precision Float Nominal precision of data resolution Float Nominal resolution of data cell_methods Text Specifies cell method as per CF convention Example TEMP cell_methods TIME mean DEPTH point LATITUDE point LONGITUDE point
6. information applied on the internally recorded or best available original data This is the best possible version of processed data Mixed This value is only allowed in the global attribute data_mode or in attributes to variables in the form lt PARAM gt DM_indicator It indicates that the file contains data in more than one of the above states In this case the variable s lt PARAM gt _DM specify which data is in which data mode e Delayed mode data Data published after all calibrations and quality control procedures have been OceanSITES data management User s manual 3 5 Reference table 5 Data Assembly Center codes Data Assembly Centers and institutions BERGEN University Of Bergen Geophysical Institute NO CCHDO CLIVAR and Carbon Hydographic Office USA CDIAC Carbon Dioxide Information Analysis Center USA EUROSITES EuroSites project EU IMOS Integrated Marine Observing System AU INCOIS Indian National Centre for Ocean Information Services JAMSTEC Japan Agency for Marine Earth Science and Technology MBARI Monterey Bay Aquarium Research Institute USA MEDS Marine Environmental Data Service Canada NDBC National Data Buoy Center USA NIOZ Royal Netherlands Institute for Sea Research NL NOCS National Oceanography Centre Southampton UK PMEL Pacific Marine Environmental Laboratory USA SIO Scripps Institution of Oceanography USA UH Uni
7. note on time formats below NUG Level of processing and quality control applied to data Preferred values are listed in reference table 3 A value valid for the whole dataset one of unknown no QC done no known problems excellent no known problems some QC done probably good validation phase mixed some problems see variable attributes A semi colon separated list of the names of any individuals or institutions that contributed to the creation of this data ACDD The roles of any individuals or institutions that contributed to the creation of this data separated by semi colons ACDD The email addresses of any individuals or institutions that contributed to the creation of this data separated by semi colons ACDD e cdm_data_type is acceptable in any file the use of a featureType attribute indicates that this is a Discrete Sampling Geometry file that adheres to rules for such files including some contraints on acceptable coordinate variables see CF Documentation OceanSITES data management User s manual 2 2 Dimensions NetCDF dimensions provide information on the size of the data variables and additionally tie coordinate variables to data CF recommends that if any or all of the dimensions of a variable have the interpretations of date or time T height or depth Z latitude Y or longitude X then those dimensions should appear in the relative order T Z Y X in t
8. requests that all other attributes be used and contain meaningful information unless technical reasons make this impossible OceanSITES data management User s manual lt A gt standardized attributes listed in reference tables lt B gt attributes whose values are set following OceanSITES rules lt C gt attributes whose value is free text set by the data provider Type name dimension attributes Float lt PARAM gt TIME DEPTH LATITUDE LONGITUDE lt PARAM gt standard_name lt A gt lt PARAM gt units lt A gt lt PARAMs gt _FillValue lt B gt lt PARAMs gt coordinates lt B gt lt PARAM gt long_name lt B gt lt PARAM gt QC_ indicator lt A gt lt PARAM gt processing_level lt A gt lt PARAM3 gt valid_min lt B gt lt PARAM gt valid_max lt B gt lt PARAM gt comment lt C gt lt PARAMs gt ancillary_variables lt B gt lt PARAMs gt history lt B gt lt PARAM gt uncertainty lt B gt lt PARAM gt accuracy lt B gt lt PARAM3 gt precision lt B gt lt PARAM gt resolution lt B gt lt PARAM cell_methods lt A gt lt PARAM3 gt DM_ indicator lt A gt lt PARAMs gt reference_scale lt B gt lt PARAMS gt sensor_model lt Y gt lt PARAM gt sensor_manufacturer lt Y gt lt PARAMs gt sensor_reference lt Y gt lt PARAMs gt sensor_serial_number lt Y gt lt PARAM gt sensor_mount
9. the information may be given as text attributes of that variable if they vary along one or more axes they are provided as a separate numeric flag variable with at least one dimension that matches the target variable When QC information is provided as a separate flag variable CF requires that these variables carry attributes flag values and flag_meanings These provide a list of possible values and their meanings When this information is provided in the attributes of the target variables it should be given in a human readable form Description of QC attributes is provided above in the sections on data variables and coordinates Below is a description of how to provide this information as a separate variable Examples are given for coordinate and data variables data variables are identified by the term lt param gt which represents a name from our list of variable names Byte TIME_QC TIME Quality flag for each TIME value Byte POSITION _QC LATITUDE Quality flag for LATITUDE and LONGITUDE pairs Byte DEPTH_QC DEPTH Quality flag for each DEPTH value Byte lt PARAM gt _QC TIME DEPTH Quality flags for values of associated lt PARAM gt lt PARAM gt _QC long_name quality flag for The flag scale is specified in reference table 2 and is lt PARAM gt included in the flag_meanings attribute lt PARAM gt _QC flag_values 0 1 2 3 4 7 8 long_name type char fixed value 9 flag_values type b
10. 02 month and resolution of 0001 OceanSITES data management User s manual 3 Reference tables 3 1 Reference table 1 data_type The data_type global attribute should have one of the valid values listed here Data type OceanSITES profile data OceanSITES time series data OceanSITES trajectory data 3 2 Reference table 2 QC_indicator The quality control flags indicate the data quality of the data values in a file The byte codes in column 1 are used only in the lt PARAM gt _QC variables to describe the quality of each measurement the strings in column 2 meaning are used in the attribute lt PARAM gt QC_indicator to describe the overall quality of the parameter When the numeric codes are used the flag_values and flag_meanings attributes are required and should contain lists of the codes comma separated and their meanings space separated replacing spaces within each meaning by 1 Code Meaning Comment probably good data potentially correctable bad These data are not to be used without scientific correction or re data calibration bad data Data have failed one or more tests Data were not observed but reported e g instrument target depth interpolated value Missing data may be interpolated from neighboring data in space or time missing value This is a fill value OceanSITES data management User s manual 3 3 Reference table 3 Processing level This table descr
11. 860400 201 1 02 22T21 07 27Z 201 1 04 08T04 31 05Z D time depth latitude longitude sea_water_temperature sea_water_electrical_conductivity sea_water_salinity depth OceanSITES data management User s manual 7 Appendix 1 Further Information links tools OceanSITES website http www oceansites org NetCDF We attempt to follow NetCDF Best Practices described at unidata ucar edu software netcdf docs BestPractices html CF We implement and extend the NetCDF Climate and Forecast Metadata Convention including the CF standard names available at cfconventions org Udunits Units are from the Udunits package as implemented by CF unidata ucar edu software udunits ISO8601 Description available at http en wikipedia org wiki ISO_8601 ACDD Our global attributes implement the Unidata NetCDF Attribute Convention for Dataset Discovery at http wiki esipfed org index php Category Attribute_Conventions_Dataset_Discovery We recommend consulting the NODC NetCDF Templates available at http www nodc noaa gov data formats netcdf The SeaDataNet BODC vocabulary server is the repository for many oceanographic terms Sea Area http seadatanet maris2 nl v_bodc_vocab_v2 search asp lib C16 Parameter codes http seadatanet maris2 nl v_bodc_vocab_v2 search asp lib P02 Platform category http seadatanet maris2 nl v_bodc_vocab_v2 search asp lib L06 THREDDS The cdm_data_type global attribute is used by TH
12. Climate Varibility and project or DAC specific statement but must allow free use of Predictability standards cf data OceanSITES has adopted the CLIVAR data policy http www clivar org data da which explicitly calls for free and unrestricted data exchange ta_policy php Data Details at available free of charge http Awww clivar org data data_policy php User assumes all risk for ACDD use of data User must display citation in any publication or product using data User must contact PI prior to any commercial use of data citation citation These data were The citation to be used in publications using the dataset collected and made freely should include a reference to OceanSITES but may contain available by the any other text deemed appropriate by the PI and DAC OceanSITES project and the national programs that contribute to it OceanSITES specific acknowledgement acknowledgement Principa A place to acknowledge various types of support for the funding for the NTAS project that produced this data ACDD experiment is provided by the NOAA Climate Observation Division OceanSITES data management User s manual Provenance date_created date_modified processing_ level QC_indicator contributor_name contributor_role contributor_email date Created 2006 04 11T08 35 00Z date_modified 2012 03 01T15 00 002 history 2005 04 11T08 35 00Z data collected A Me
13. FileName nc where site is the OceanSITES site code 6 2 Index file GDAC data inventory To allow for data discovery without downloading the data files themselves an index file is created by each of the GDACs The index file is a comma separated values text file named oceansites_index txt in the root directory of each GDAC It contains a list of the files on the server and metadata extracted from those files The file contains a header section lines of which start with characters the list of all data files available on the GDAC and their descriptions Each line contains the following information OceanSITES data management User s manual e file the file name beginning from the GDAC root directory e date update the update date of the file Y YY Y MM DDTHH MI SSZ e start date first date for observations YY YY MM DDTHH MI SSZ e end_date last date for observations YY YY MM DDTHH MI SSZ e southern_most_latitude e northern_most_latitude e western_most_longitude e eastern_most_longitude e geospatial_vertical_min e geospatial_vertical_min e update_interval M monthly D daily Y yearly V void e size the size of the file in megabytes e gdac_creation_date date of creation of the file on the GDAC e gdac_update_date date of update of the file on the GDAC e data mode R P D M real time provisional delayed mode mixed see reference table 5 e parameters list of parameters standard_name available i
14. MFGR long_name instrument manufacturer char INST_MODEL DEPTH strlen2 INST_MODEL long_name instrument model name int INST_SN DEPTH INST_SN long_name instrument serial number char INST_URL DEPTH strlen3 INST_URL long_name instrument reference URL char INST_MOUNT DEPTH strlen3 INST_MOUNT long_name instrument mount data INST _ an empty variable aka an umbrella INST_MFGR RBR Global aa Seabird Electronics Seabird Electronics INST_MODEL TR1060 SBE37 SBE16 INST_MOUNT mounted_on_surface_buoy mounted_on_mooring_line mounted_on_seafloor_structure_riser INST_SN 14875 1325 1328 INST_URL http www rbr global com products tr 1060 temperature http www seabird com products spec_sheets 37smdata htm http www seabird com 16plus_ReferenceSheet pdf In method 2 sensor information is supplied as a series of attributes for a data variable These attributes may contain comma separated lists to provide different information for multiple instruments OceanSITES data management User s manual Method 2 example double TEMP TIME DEPTH TEMP sensor_name RBR Global TR1060 SBE23 SBE16 TEMP sensor_serial_number 14875 1325 1328 TEMP sensor_mount mounted_on_surface_buoy mounted_on_mooring_line mounted_on_seafloor_structure_riser TEMP sensor_orientation vertical double PSAL TIME DEPTH PSAL sensor_n
15. PI typically a scientist at a research institution maintains the observing platform and the sensors that deliver the data He or she is responsible for providing the data and all auxiliary information to a Data Assembly Center DAC a PI may also act as a DAC The DAC assembles OceanSITES compliant files from this information and delivers these to the two Global Data Assembly Centers GDACs where they are made publicly available The GDACs distribute the best copy of the data files When a higher quality data file e g calibrated data is available it replaces the previous version of the data file The user can access the data at either GDAC which are synchronized daily Data archive will be implemented by the National Ocean Data Center of the USA our documented data specification is critical to the archive process 6 1 Global Data Assembly Centers Two global data assembly centers GDACs provide access points for OceanSITES data One is in France at Coriolis http www coriolis eu org the other is in the US at NOAA s National Data Buoy Center NDBC http www ndbc noaa gov The servers at the GDACs are synchronized at least daily to provide the same OceanSITES data redundantly The user can access the data at either GDAC s ftp site e ftp data ndbc noaa gov data oceansites e ftp ftp ifremer fr ifremer oceansites Data is organized by site and by resource type in the GDACs DATA directories DATA site
16. REDDS More information at unidata ucar edu projects THREDDS CDM CDM TDS htm EPSG used for the coordinate reference frames http www epsg org WMO For information about unique numbering of OceanSITES Moorings and Gliders see http www wmo int pages prog amp mmop wmo number rules html OceanSITES file format checker java and file converters are freely available at http projets ifremer fr coriolis Observing the ocean Observing system networks OceanSITES Access to data OceanSITES data management User s manual 30 8 Appendix 2 Sensor and instrument metadata There are two methods for providing complete sensor metadata In method 1 the variable attribute instrument points to an umbrella variable that describes an instrument and its sensor suite the instrument variable ties one or more instruments to one or more data variables Instrument variables may include manufacturer model serial number a reference URL that points to a web resource describing the sensor sensor mount and orientation Orientation may not be needed for all variables but is highly recommended for current meters and profilers Method 1 example variables double TEMP TIME DEPTH TEMP instrument INST double PSAL TIME DEPTH PSAL instrument INST int INST INST long_name instruments INST ancillary_variables INST_ MFGR INST_MOD INST_SN INST_URL INST_MOUNT char INST_ MFGR DEPTH strlen1 INST_
17. S 1 platform from the June 2002 deployment to present 5 3 product data files The product data files are processed from one or more deployment data files Their variables are derived from one or more files from the DATA directory Product data files may not contain all the detailed information of each individual data file There may be multiple files derived from the same data Product data files are found in the directory DATA SiteCode PRODUCTS OceanSITES data management User s manual Example DATA CIS PRODUCTS OS_CIS 1_200206_M_AirSeaFluxes hourly nc This file contains hourly air sea fluxes data from the CIS 1 mooring from the June 2002 deployment to present 5 4 products derived from multiple sites The directory PRODUCTS_MULTIPLE_SITES contains products from multiple sites filenames are slightly different from single site files PRODUCTS_MULTIPLE_SITES ProductName OS_ ProductFileIndentification _ VariablesIndicator nc e ProductName name of the product e ProductFileIndentification file name of the product e VariablesIndicator optional indicator of the variables Please indicate the sites used in the site_code attribute Example PRODUCTS_MULTIPLE_SITES RapidTransportSection OS_RapidTransportSection2010 nc OceanSITES data management User s manual 6 OceanSITES Data Management topics OceanSITES is comprised of three organizational units PIs DACs GDACs The Principal Investigator
18. TES specific North Tropical South Atlantic Pacific Indian Ocean Southern Ocean Arctic Ocean geospatial_lat_ geospatial_lat_min 59 8 The southernmost latitude a value between 90 and 90 min degrees may be string or numeric ACDD GDAC geospatial_lat_ geospatial_lat_max 59 8 The northernmost latitude a value between 90 and 90 max degrees ACDD GDAC geospatial_lat_uni geospatial_lat_units Must conform to udunits If not specified then degree_north ts degree_north is assumed ACDD geospatial_lon_ geospatial_lon_min 41 2 The westernmost longitude a value between 180 and 180 min degrees ACDD GDAC geospatial_lon_ geospatial_lon_max 41 2 The easternmost longitude a value between 180 and 180 max degrees ACDD GDAC geospatial_lon_u geospatial_lon_units degre Must conform to udunits If not specified then degree_east is nits e_east assumed ACDD geospatial_verti geospatial_vertical_min 10 Minimum depth or height of measurements ACDD GDAC cal_min 0 geospatial_verti geospatial_vertical_max 20 Maximum depth or height of measurements ACDD GDAC cal_max 00 geospatial_vertica geospatial_vertical_positive Indicates which direction is positive up means that z _positive i represents height while a value of down means that z represents pressure or depth If not specified then down is assumed ACDD Ge vertica geospatial_vertical_units m Units of depth
19. ame RBR Global TR1060 SBE23 SBE16 PSAL sensor_serial_number 14875 1325 1328 PSAL sensor_mount mounted_on_surface_buoy mounted_on_mooring_line mounted_on_seafloor_structure_riser PSAL sensor_orientation vertical 31 OceanSITES data management User s manual 32 9 Appendix 3 Glossary This chapter gives a definition for the OceanSITES items described in this manual Site An OceanSITES site is a defined geographic location where sustained oceanographic meteorological or other observations are made Example CIS is a site in the Central Irminger Sea Note A site should be thought of as a point in space i e a nominal position with a small area extent around it such that successive observations from anywhere within this area reasonably represent conditions at the nominal position for the major scientific questions that the observations address Array An OceanSITES array is a grouping of sites based on a common and identified scientific question or on a common geographic location Example An IRMINGERSEA array would identify the sites CIS LOCO IRMINGERSEA and OOI IRMINGERSEA as sharing a common scientific interest and or geographic location Notes It is valid for a single site to belong to no one or multiple arrays Documenting the array is recommended only if it identifies commonalities beyond a single project or a single operating institution Network An OceansSITES network
20. ay OceansITEs Taking the pulse of the global ocean OceanSITES Data Format Reference Manual NetCDF Conventions and Reference Tables Version 1 3 May 19 2014 Contents END dr FY ai AEE EEE EE E E E A EE 3 UN a TE 5 1 1 en EE A 1 2 About this EE REEL Eeer A 1 3 Beeler A 1 4 TEE A 1 5 eege eeheegeeder eege ged aAA aa iaaa i na ai aia iaaa tiai aaar aiaia 6 2 OceanSITES NetCDF data format version 1 3 ssssssssssssssunsnunnnnnunnnunnnunnnnnnnnnnnnnnnnnnnnnnnannnnnannnannnnnnnnn 7 2 1 GIODGL EE 7 2 2 RTE 12 2 3 Coordinate VATIODICS sscizscscsecsscsstecteseateccudestisiuzsclestidastectesestestateedssseecolisseduatzstaguetestadecbistneealasiesiadeecigesdociageodisten 13 2 4 Data variables ramanand i 14 2 5 Quality control voartobles ENEE 16 KE Te AU 18 3 1 Reference table 1 data_type EEN 18 3 2 Reference table 2 OC Tmndicotor EEN 18 3 3 Reference table 3 Processing level EEN 19 3 4 Reference table 4 D ta Moderering a 19 3 5 Reference table 5 Data Assembly Center codeg ENEE 20 3 6 Reference table 6 Variable NAMES EEN 20 3 7 Reference table 7 Sensor mount characteristics EEN 22 3 8 Reference table 8 Sensor OViCNtQtiOn recsssscssssessseesssesssnsesssasssssasesssnesssneessnatessnasesssasessnatessnatessnanees 22 OceanSITES NetCDF products format cssssssssesesseeeeeseseseessseseseeensneceeeseeeeesenaeananseeeseseenenenseseees 23 5 File naMiNg CONVENTION E 24 5 1 File naming convention fOr data Dies 24 5 2 File namin
21. braries and machine independent data formats Our implementation of NetCDF is based on the community supported Climate and Forecast Metadata Convention CF which provides a definitive description of the data in each variable and the spatial and temporal properties of the data Any version of CF may be used but it must be identified in the Conventions attribute The purpose of the format specification is to make OceanSITES data easy to discover and to use Any relevant metadata should be included whether it is part of the standard or not For example water depth instrumentation descriptions and detailed provenance are all useful fields and should be included if available OceanSITES adds some requirements to the CF standard to make it easier to share in situ data to make it simpler for the GDACs to aggregate data from multiple sites and to ensure that the data can be created and understood by basic NetCDF utilities e Where time is specified as a string the ISO8601 standard YYYY MM DDThh mm ssZ is used this applies to attributes and to the base date in the units attribute for time There is no default time zone UTC must be used and specified e Global attributes from Unidata s NetCDF Attribute Convention for Data Discovery ACDD are implemented e Variable names short names from a controlled vocabulary are recommended The components of NetCDF files are described in the following sections 2 1 Global attributes
22. entions CF 1 6 Name of the conventions followed by the dataset OceanSITES 1 3 ACDD NUG 1 2 netcdf_version netcdf_version 3 5 NetCDF version used for the data set OceanSITES specific a information D name publisher_name Alice Name of the person responsible for metadata and formatting Juarez of the data file ACDD publisher_email publisher_email ajuarez Email address of person responsible for metadata and AT ifremer fr formatting of the data file ACDD publisher_url publisher_url http ifremer Web address of the institution or of the data publisher fr ACDD references references http Published or web based references that describe the data or www oceansites org methods used to produce it Include a reference to http www noc soton ac uk OceanSITES and a project specific reference if appropriate animate index php data_assembly_c data_assembly_center EU Data Assembly Center DAC in charge of this data file enter ROSITES The data_assembly_center are listed in reference table 5 OceanSITES specific update_interval update_interval PT12H Update interval for the file in ISO 8601 Interval format OceanSITES specific PnYnMnDTnHnM where elements that are 0 may be omitted Use void for data that are not updated on a schedule Used by inventory software GDAC license license Follows CLIVAR A statement describing the data distribution policy it may be a
23. ess of the project lead for the project that produced investigator_email investigator_email the data contained in the file AJuarez AT whoi edu principal_ principal_ URL with information about the project lead investigator_url investigator_url whoi edu profile AJuarez institution institution National Specifies institution where the original data was produced Oceanographic Centre CF project project CIS The scientific project that produced the data array array TAO A grouping of sites based on a common and identified OceanSITES specific scientific question or on a common geographic location network network EuroSITES A grouping of sites based on common shore based logistics OceanSITES specific or infrastructure keywords keywords_vocabulary Please use one of GCMD Science Keywords SeaDataNet vocabulary GCMD Science Keywords Parameter Discovery Vocabulary or AGU Index Terme ACDD keywords keywords EARTH Provide comma separated list of terms that will aid in SCIENCE gt Oceans gt Ocean discovery of the dataset ACDD Temperature OceanSITES data management User s manual 9 comment comment Provisional data Miscellaneous information about the data or methods used to produce it Any free format text is appropriate CF Geo spatial temporal area North Atlantic Ocean Geographical coverage Try to compose of the following OceanSI
24. ference lt R gt DEPTH coordinate_reference_frame urn ogc crs EPSG lt S gt DEPTH long_name Depth of measurement DEPTH _FillValue 99999 0 DEPTH valid_min 0 0 DEPTH valid_max 12000 0 DEPTH QC_indicator lt X gt DEPTH processing_level lt Y gt DEPTH uncertainty lt Z gt or DEPTH accuracy lt Z gt DEPTH comment Depth calculated from mooring diagram Notes on coordinate variables Depth of measurements Example 513 for a measurement 513 meters below sea surface lt Q gt Positive attribute may be up atmospheric or oceanic relative to sea floor or down oceanic lt R gt The depth reference default value is sea_level Other possible values are mean_sea_level mean_lower_low_water wgs84_geoid lt S gt Use CRF 5831 for depth or 5829 for height relative to instantaneous sea level lt X gt Text from reference table 2 Replaces DEPTH_QC if constant lt Y gt Text from reference table 3 lt Z gt Choose appropriate value e Time By default the time word represents the center of the data sample or averaging period The base date in the units attribute for time is represented in ISO8601 standard YY YY MM DDThh mm ssZ note that UTC Z must be explicitly specified This requirement is an extension to ISO8601 e DEPTH The depth variable may be positive in either upward or downward direction which is defined in i
25. finition chapter 1 2 March 2010 5 2 add geospatial_vertical_min and geospatial_vertical_min in the index file draft 1 7 useful links chapter created OceanSITES data management User s manual 1 2 April 2010 Last comments received from Matthias Lankhorst Nan Galbraith Derrick Snowden draft Hester Viola Andrew Dickson John Graybeal 1 6 information and contact on project office 2 2 1 update of Z axis 2 2 1 latitude longitude reference and EPSG coordinate reference 2 2 1 depth EPSG coordinate reference 2 2 1 note on latitude and longitude WGS84 datum 2 2 1 note on DEPTH reference 2 2 3 all attributes listed in the example 2 2 4 metadata variables sensors information calibrations 3 simplify metadata introduction 4 2 QC flag scale 6 not used comment 4 3 1 use DOXY_TEMP instead of TEMP_DOXY 4 4 4 new centres 4 6 update of OceanSITES catalogue 1 2 June 2010 Updates from 29 06 2010 webex meeting draft 2 1 remove For a mooring with a GPS receiver use LATITUDE of the same dimension as TIME and provide the actual location 2 2 add an optional array and network optional global attribute Allow multiple axes in a file e 2 remove Coordinate variables which describe the dimensions of a data set are limited to a single set of longitude latitude depth and time X Y Z and T dimensions in any single file If data from a refe
26. g convention for gridded data Diese 24 5 3 File naming convention for Product data Dese 24 5 4 File naming convention for products derived from multiple Sites 25 6 OceanSITES Data Management topics scsssssscsssscecsssseeesensesssseeeeesenseseesaeeeessssessesaeeeeeensesseseenenes 26 6 1 Global Data Assembly Center EEN 26 6 2 Index file GDAC doto Imventor ENEE 26 7 Appendix 1 Further Information links tOOlS ss sssssusussunsunnnnuunnnnunnunnnnunnunnunnunnnnunnunnnnnunnnnnnnnnnne 29 8 Appendix 2 Glossary seniseseccnisecececccscnteenctvncinncscedsavestecsosscuesentncsedinadicecaetscinccacsdedsavcstedeesdcdedseverveuerseenars 30 OceanSITES data management User s manual 3 History Version Date Comment 20 03 2003 TC creation of the document 0 3 20 02 2004 TC updates on locations mooring name data state indicator parameters table epic codes history information NG make more flexible add dataset metadata file EE 1 0 18 02 2006 TC updates following OceanSITES data management meeting 2006 Hawai i 2 1 LEVEL dimension replaces DEPTH to accomadate depth or pressure 2 2 QC_MANUAL field created 2 2 CONVENTION field removed 2 2 PLATFORM_CODE added 2 2 SITE_CODE added 2 2 WMO_PLATFORM_CODE added 2 3 DEPTH renamed DEPH to comply to GF3 2 3 DATA_MODE set at measurement level 3 metadata file description transferred to OceanSITES metadata proposal until approval 5 file namin
27. g convention updated 19 02 2006 NG data codes in chapter 4 1 2 28 04 2006 PF amp NG data mode optional 28 04 2006 TC amp JG 2 2 global attributes 1 1 April May NG MM TC ML general revision based on OceanSITES 2008 meeting June 2008 Epic codes removed Use ISO8601 for string dates Remove general attributes Update global attribute section for CF 1 1 compatibility New dimensions for DEPTH LATITUDE LONGITUDE Add an uncertainty attribute New presentation of the document 1 2 September 1 3 GDAC distribute the best data statement draft 2009 1 4 add a User obligations paragraph 1 5 add a Disclaimer paragraph 2 note on format version 2 2 1 no fill value allowed for TIME LATITUDE LONGITUDE DEPTH 2 2 1 use WGS84 datum for latitude and longitude 2 2 1 DEPTH reference optional attribute 2 2 3 and 4 7 use sensor_mount optional attribute 2 2 3 and 4 8 use sensor_orientation optional attribute 2 2 3 use sensor_name and sensor_orientation attributes 4 3 revisit parameter names 4 4 update DAC codes 4 6 add a sentence on OceanSITES site naming policy 5 1 new data file naming convention 5 2 add GDAC_CREATION_DATE GDAC_UPDATE_DATE PARAMETERS in the index file 1 2 December 5 1 revisit file naming convention draft 7 2009 5 2 add a data_mode in the index file 6 add a Glossary de
28. he variable s definition in the CDL Name Example Comment TIME TIME unlimited Number of time steps Example for a mooring with one value per day and a mission length of one year TIME contains 365 time steps DEPTH DEPTH 5 Number of depth levels Example for a mooring with measurements at nominal depths of 0 25 10 50 100 and 200 meters DEPTH 5 LATITUDE LATITUDE 1 Dimension of the LATITUDE coordinate variable LONGITUDE LONGITUDE 1 Dimension of the LONGITUDE coordinate variable Notes on Dimensions e CF v 1 5 introduced Discrete Sampling Geometries these are permitted in OceanSITES but are not described in this manual they may require different sets of dimensions from those documented here Please see Chapter 9 Discrete Sampling Geometriesof the CF Conventions document http cf pcmdi lInl gov documents cf conventions latest cf conventions document 1 for details OceanSITES data management User s manual 2 3 Coordinate variables NetCDF coordinates are a special subset of variables Coordinate variables orient the data in time and space they may be dimension variables or auxiliary coordinate variables identified by the coordinates attribute on a data variable Coordinate variables have an axis attribute defining that they represent the X Y Z or T axis As with data variables OceanSITES recommends variable names and requires specific attributes for coordinate variables units axis and w
29. here available standard_name are required Missing values are not allowed in coordinate variables All attributes in this section are highly recommended The attribute OC indicator may be omitted for any parameter if there is a separate QC variable for that parameter Type name dimension attributes Double TIME TIME TIME standard name time TIME units days since 1950 01 01T00 00 002 TIME axis T TIME long_name time of measurement TIME valid_min 0 0 TIME valid_max 90000 0 TIME OC indicator lt X gt TIME Processing_level lt Y gt TIME uncertainty lt Z gt or TIME accuracy lt Z gt TIME comment Optional comment Float LATITUDE LATITUDE LATITUDE standard_name latitude LATITUDE units degrees_north LATITUDE axis Y LATITUDE long_name latitude of measurement LATITUDE reference WGS84 LATITUDE coordinate_reference_frame urn ogc crs EPSG 4326 LATITUDE valid_min 90 0 LATITUDE valid_max 90 0 LATITUDE QC_ indicator lt X gt LATITUDE Processing_level lt Y gt LATITUDE uncertainty lt Z gt or LATITUDE accuracy lt Z gt LATITUDE comment Surveyed anchor position Comment Date and time UTC of the measurement in days since midnight 1950 01 01 Example Noon Jan 2 1950 is stored as 1 5 lt X gt Text string from reference table 2 Replaces the TIME _QC if constant Cf note
30. ibes the quality control and other processing procedures applied to all the measurements of a variable The string values are used as an overall indicator i e one summarizing all measurements in the attributes of each variable in the processing_level attribute Raw instrument data Instrument data that has been converted to geophysical values Post recovery calibrations have been applied Data has been scaled using contextual information Known bad data has been replaced with null values Known bad data has been replaced with values based on surrounding data Ranges applied bad data flagged Data interpolated Data manually reviewed Data verified against model or other contextual information Other QC process applied 3 4 Reference table 4 Data mode The values for the variables lt PARAM gt DM the global attribute data mode and variable attributes lt PARAM gt DM indicator are defined as follows Value Meaning Real time data Data coming from the typically remote platform through a communication channel without physical access to the instruments disassembly or recovery of the platform Example for a mooring with a radio communication this would be data obtained through the radio Provisional data Data obtained after instruments have been recovered or serviced some calibrations or editing may have been done but the data is not thought to be fully processed Refer to the history attribute for more detailed
31. ilable Data files should be in compliance with a published OceanSITES format specification A user of OceanSITES data must comply with the requirements set forth in the attributes license and citation of the NetCDF data files Unless stated otherwise a user must acknowledge use of OceanSITES data in all publications and products where such data are used preferably with the following standard citation These data were collected and made freely available by the international OceanSITES project and the national programs that contribute to it 1 4 Disclaimer OceanSITES data are published without any warranty expressed or implied The user assumes all risk arising from his her use of OceanSITES data OceanSITES data are intended to be research quality and include estimates of data quality and accuracy but it is possible that these estimates or the data themselves contain errors It is the sole responsibility of the user to assess if the data are appropriate for his her use and to interpret the data data quality and data accuracy accordingly OceanSITES data management User s manual 1 5 Feedback OceanSITES welcomes users to ask questions and report problems to the contact addresses listed in the data files or on the OceanSITES web page 6 OceanSITES data management User s manual 2 OceanSITES NetCDF data format version 1 3 OceanSITES uses NetCDF Network Common Data Form a set of software li
32. is a grouping of sites based on common shore based logistics or infrastructure Example EuroSITES although technically a single project bundles multiple institutional efforts and connects otherwise remote sites to a degree that warrants calling it a network Notes It is valid for a single site to belong to no one or multiple networks Documenting the network is recommended only if it identifies structures beyond a single project or a single operating institution Platform An OceanSITES platform is an independently deployable package of instruments and sensors forming part of site It may be fixed to the ocean floor may float or may be self propelled Examples CIS 1 a mooring in Central Irminger Sea and THETYS II a vessel that performs regular CTDs at DYFAMED site Deployment An OceanSITES deployment is an instrumented platform performing observations for a OceanSITES data management User s manual 33 period of time Changes to the instrumentation or to the spatial characteristics of the platform or its instruments constitute the end of the deployment Examples The CTD data for CIS 1 deployment performed in May 2009 200905 and are distributed as OS_CIS 1_200905_R_CTD nc file Instrument An OceanSITES instrument is device that provides digital data output Examples CTD ADCP Meteorological Package Sensor A device that measures environmental parameter but does not digitize data for transmi
33. n the file separated with blank The fill value is empty OceanSITES data management User s manual GDAC index file oceansites_index txt OceanSITES Global Data Assembly Center GDAC Index File Two GDACs FTP servers are on line at ftp data ndbc noaa gov data oceansites and ftp ftp ifremer fr ifremer oceansites Also a THREDDS server is available at http dods ndbc noaa gov thredds catalog data oceansites catalog html For more information please contact http www oceansites org This OceanSITES index file was last updated on 2013 04 161T13 30 01Z Columns are defined as follows FILE relative to current file directory DATE_UPDATE START_DATE END_DATE SOUTHERN_MOST_LATITUDE NORTHERN_MOST_LATITUDE WESTERN _MOST_LONGITUDE EASTERN_MOST_LONGITUDE MINIMUM_DEPTH MAXIMUM_DEPTH UPDATE_INTERVAL SIZE in bytes GDAC_CREATION_DATE GDAC_UPDATE_DATE DATA_MODE R real time D delayed mode M mixed P provisional PARAMETERS space delimited CF standard names DATA ANTARES OS_ANTARES 1_200509_D_CTD nc 201 1 04 06T08 41 10Z 2005 09 15T 12 00 13Z 2006 12 317T23 55 21Z 42 7 42 9 6 15 6 19 0 2500 void 30644 16 201 1 02 22T21 07 27Z 201 1 04 08T04 31 05Z D time depth latitude longitude sea_water_temperature sea_water_electrical_conductivity sea_water_salinity depth DATA ANTARES OS_ANTARES 1_200701_D_CTD nc 201 1 04 06T08 41 24Z 2007 01 01T00 01 48Z 2007 12 317T23 58 26Z 42 7 42 9 6 15 6 19 0 2500 void 2
34. on quality control in data variable section lt Y gt Text from reference table 3 lt Z gt Choose appropriate value Latitude of the measurements Units degrees north southern latitudes are negative Example 44 4991 for 44 29 56 76 N lt X gt Text string from reference table 2 Replaces POSITION_QC if constant lt Y gt Text from reference table 3 lt Z gt Choose appropriate value Float LONGITUDE LONGITUDE LONGITUDE standard_name longitude LONGITUDE units degrees_east LONGITUDE axis X LONGITUDE reference WGS84 LONGITUDE coordinate_reference_frame urn ogc crs EPSG 4326 LONGITUDE long_name Longitude of each location LONGITUDE valid_min 180 0 LONGITUDE valid_max 180 0 LONGITUDE QC_ indicator lt X gt LONGITUDE processing_level lt Y gt LONGITUDE uncertainty lt Z gt or LONGITUDE accuracy lt Z gt LONGITUDE comment Optional comment Longitude of the measurements Unit degrees east western latitudes are negative Example 16 7222 for 16 43 19 92 E lt X gt Text from reference table 2 Replaces POSITION_QC if constant lt Y gt Text from reference table 3 lt Z gt Choose appropriate value OceanSITES data management User s manual Float DEPTH DEPTH DEPTH standard_name depth DEPTH units meters DEPTH positive lt Q gt DEPTH axis Z DEPTH re
35. perature in situ ITS 90 scale TEMP QC_ indicator Good data TEMP Processing_level Data manually reviewed TEMP coordinates TIME DEPTH LATITUDE LONGITUDE TEMP valid_min 2 0f TEMP valid_max 40 f TEMP comment Provisional data TEMP uncertainty 0 01f TEMP accuracy 0 01f TEMP precision 0 01f TEMP cell_methods TIME mean DEPTH point LATITUDE point LONGITUDE point TEMP DM_indicator P TEMP reference_scale ITS 90 Example Sea temperature QC variable If there is no QC_indicator attribute in the TEMP variable above there must be a list of ancillary variables e g TEMP ancillary_variables TEMP_QC TEMP_ uncertainty as well as the quality indicator variables e g BYTE TEMP_QC TIME DEPTH TEMP_QC long_name quality flag of sea water temperature TEMP_QC conventions OceanSITES QC Flags TEMP_QC coordinates TIME DEPTH LATITUDE LONGITUDE TEMP_QC flag_values 0 1 2 3 4 7 8 9 TEMP_QC flag_meanings unknown good_data probably_good_data potentially_correctable bad_data bad_data nominal_value interpolated_value missing_value FLOAT TEMP_ uncertainty TIME DEPTH TEMP_uncertainty long_name uncertainty of sea water temperature TEMP_ uncertainty units degree_Celsius TEMP_ uncertainty _ FillValue 99999 f TEMP_ uncertainty comment Based on initial accuracy of 002 range of 5 to 35 drift of 00
36. pressure or height If not specified then _units eter meter is assumed ACDD time_coverage_ time_coverage_start 2006 Start date of the data in UTC See note on time format below start 03 01T00 00 00Z ACDD GDAC time_coverage_ time_coverage_end 2006 Final date of the data in UTC See note on time format below end 03 05T23 59 29Z ACDD GDAC time_coverage_d_ time_coverage_duration P Use ISO 8601 examples P1Y P3M P10D ACDD uration 415D time_coverage_duration P 1Y1M3D time time Interval between records Use ISO 8601 coverage_resoluti coverage_resolution PT30 PnYnMnDTnHnMnS e g PT5M for 5 minutes PT1H for on M hourly PT30S for 30 seconds ACDD cdm_data_type cdm_data_type Station The Unidata CDM common data model data type used by THREDDS e g point profile section station station_profile trajectory grid radial swath image use Station for OceanSITES mooring data ACDD featureType featureType timeSeries or Optional and only for files using the Discrete Sampling timeSeriesProfile Geometry available in CF 1 5 and later See CF documents CF OceanSITES data management User s manual data_type data_type OceanSITES From Reference table 1 OceanSITES specific GDAC time series data mmm used e version format_version 1 3 OceanSITES format version may be 1 1 1 2 1 3 OceanSITES specific GDAC Conventions Conv
37. rence station cannot all be put on to a single set of axes then separate files are created for these data e 2 3 1 remove Data with different coordinate variables must be recorded in separate files 2 3 1 empty values are not allowed for coordinate variables 1 2 3 2013March NG allow multiple z coordinates clarify dimensions and coordinates clarify requirement draft 2012 for QC flag meanings change standard name for ATMS it is NOT surface pressure 1 3 April 10 NG Align with ACDD streamline globals simplify text draft 2013 1 3 May 29 MM JZ MP TC ML during meeting in Seoul Highlight OceanSITES specific attributes draft 2013 and affirm compliance with CF ACDD udunits SeaDataNet Naming and directory conventions for new kinds of files gridded products 1 3 June 1 TC cleanup the presentation of the document draft 1 3 June NG address comments and changes to ACDD remove unused globals Remove draft Sept2013 qc_manual Update crs EPSG for depth and heioght 1 3 1 Oct Dec NG Short names now just recommended multiple variables are now allowed for all 2013 dimensions Geospatial extent global attributes now recommended to be strings Added source of external attribute terms 1 3 2 Jan May NG MP MH resolve comments refine required fields redefine data mode P 2014 1 3 3 June 2014 NG rewrite sensor attribute options lower case QC terms refine filenames OceanSITES data management User s manual
38. ructure mounted_on_surface_buoy mounted_on_shipborne_profiler 3 8 Reference table 8 Sensor orientation When appropriate the orientation of an instrument such as an ADCP should be provided either as the variable attribute sensor_orientation or as a variable The following table lists the valid sensor_orientation values sensor_orientation example downward ADCP measuring currents from surface to bottom upward In line ADCP measuring currents towards the surface horizontal Optical sensor looking sideways from mooring line OceanSITES data management User s manual 4 OceanSITES NetCDF products format Products derived from OceanSITES data are available on the GDAC servers in the PRODUCT directory of each site Products derived from multiple sites are available from PRODUCT_MULTIPLE_SITES directory This manual does not specify the products data format However OceanSITES products should be distributed as NetCDF files and follow the same convention as our standard data files CF for parameters and attributes NUG CF ACDD for global attributes Udunits for units The NetCDF global attribute site_code is required On multiple sites products it must contain a blank separated list of the site codes that contributed to the product Example site_code RAPID 1 RAPID 2 RAPID 3 RAPID 4 RAPID 5 RAPID 6 RAPID 7 OceanSITES data management User s manual 5 File naming conventions Almos
39. ssion it needs to be connected to an instrument to produce a data stream that a computer can read Examples Transmissiometer Fluorometer Oxygen sensor OceanSITES data management User s manual
40. t all OceanSITES NetCDF files are named using this convention e OS OceanSITES prefix PlatformCode Platform code from the OceanSITES catalogue DeploymentCode Deployment code unique code for deployment date or number e DataMode Data Mode o R real time data o P provisional data o D delayed mode data o M mixed delayed mode and real time data PARTX An optional user defined field for identification of data Remark the field separator in the file name is _ This character must not be used in any of the file name s fields 5 1 data files Data files normally contain one type of data from one deployment Data files are found in the directory DATA SiteCode Example DATA CIS OS_CIS 1_200905_R_CTD nc This file contains temperature and salinity data from the CIS 1 platform from the May 2009 deployment 5 2 gridded data files Gridded data files are processed from one or more deployment data files Data may be gridded in time or vertical axes Be aware that when multiple data files are aggregated the attributes may not contain all the detailed information of each individual data file There may be multiple files derived from the same data but expressed in different scale e g daily hourly averages Gridded data files are found in the directory DATA SiteCode GRIDDED Example DATA CIS GRIDDED OS_CIS 1_200206_M_CTD hourly nc This file contains hourly averaged temperature and salinity data from the CI
41. t conforms to COARDS and because it simplifies the use of the data by standard software Note that it is permissible but optional to list coordinate variables as well as auxiliary coordinate variables in the coordinates attribute Note on sensor metadata Complete sensor information should be provided by one of two methods which are outlined in Appendix 2 Fields should include model name manufacturer serial number and a URL or reference that points to an instrument s specifications This information may be presented in a series of attributes attached to a data variable or via a single instrument attribute The instrument attribute points to a group of variables that contain the description of the sensors the latter method allows two dimensional information and avoids repetition of information Note on accuracy terms Accuracy is the closeness of the variable to the actual value precision is the repeatability of the measurement and resolution is the fineness to which the value can be displayed Uncertainty combines accuracy and precision These terms may be provided as attributes to the target data variables if they are constant over the dataset or may be provided as ancillary variables if they change over depth or time 2 5 Quality control variables Data quality and provenance information for both coordinate variables and data variables is needed If the quality control values are constant across all dimensions of a variable
42. ts positive attribute The Z axis may be represented as pressure if for example pressure is recorded directly by an instrument and the calculation of depth from pressure would cause a loss of information Depth is strongly preferred since it allows data to be used more directly Meteorological data should include a HEIGHT coordinate that is otherwise identical to DEPTH e The default depth reference is sea_level free sea surface In EPSG coordinate reference system the default reference for DEPTH is urn oge crs EPSG 5831 and for HEIGHT urn oge crs EPSG 5829 e The latitude and longitude datum is WGS84 This is the default output of GPS systems e Many coordinate variables for ocean data are nominal an achor position or a vertical position on a mooring chain When there is supplemental data like a GPS time series or a pressure measurement from one instrument it may be provided as a data variable and may be given an axis attribute but does not need to be specified as a coordinate 2 4 Data variables Data variables contain the actual measurements and information about their quality uncertainty and mode by which they were obtained Different options for how quality indicators are specified are outlined in the notes below the table Recommended variable names are listed in Reference Table 6 replace lt PARAM gt with any of the names indicated there Required attributes are marked as such however OceanSITES
43. versity of Hawaii USA WHOI Woods Hole Oceanographic Institution USA 3 6 Reference table 6 Variable names It is recommended that variable names start with a code based on SeaDataNet BODC parameter discovery vocabulary They are not strictly standardized however one should use the CF standard_name attribute to query data files Note that a single standard name may be used more than once in a file but short names are unique For example if sea temperature on a mooring is measured by a series of 5 Microcats and by a profiler that produces values at 10 levels it may be reported in a single file with 2 temperature variables and 2 depth variables TEMP TIME DEPTH could hold the Microcat data if DEPTH is declared as a 5 element coordinate and TEMP_prof TIME DEPTH_prof could hold the profiler data if DEPTH_prof is declared as a 10 element coordinate Both variables would have a standard name of sea_water_temperature The following lists a subset of the OceanSITES recommended variable names OceanSITES data management User s manual Parameter Standard name w sw OceanSITES data management User s manual 3 7 Reference table 7 Sensor mount characteristics The way an instrument is mounted on a mooring may be indicated by the attribute lt PARAM gt sensor_mount or by a character variable The following table lists the valid sensor_mount values sensor_mount mounted_on_fixed_st
44. yer 2005 04 12T10 11 00Z OceanSITES file with provisional data compiled and sent to DAC A Meyer processing_level Data verified against model or other contextual information OceanSITES specific QC_indicator excellent OceanSITES specific contributor_name Jane Doe contributor_role Editor contributor_email jdoe AT ifremer fr Notes on Global Attributes e The file dates date_created and date_modified are our interpretation of the ACDD file dates Date_created is the time stamp on the file date_modified may be used to represent the version date of the geophysical data in the file The date created may change when e g metadata is added or the file format is updated and the optional date_modified MAY be earlier e Geospatial extents geospatial_lat_min max and lon_min max are preferred to be stored as strings for use in the GDAC software however numeric fields are acceptible The date on which the data file was created Version date and time for the data contained in the file UTC See note on time format below ACDD The date on which this file was last modified ACDD Provides an audit trail for modifications to the original data It should contain a separate line for each modification with each line beginning with a timestamp and including user name modification name and modification arguments The time stamp should follow the format outlined in the
45. yte Required fixed value OceanSITES data management User s manual lt PARAM gt _QC flag_meanings unknown good_data probably_good_data potentially correctable_bad_data bad_data nominal_value interpolated_value missing_value flag_meanings type char Required fixed value Char lt PARAM gt _DM TIME DEPTH lt PARAM gt _DM long_name data mode lt PARAM gt _DM lt flag_values R P D M lt PARAM gt _DM lt flag_meanings real time provisional delayed mode mixed This is the data mode from reference table 4 Indicates if the data point is real time delayed mode or provisional mode It is included when the dataset mixes modes for a single variable long_name type char flag_values type char flag_meanings type char Float lt PARAM gt _UNCERTAINTY TIME DEPTH lt PARAM gt _UNCERTAINTY long_name uncertainty of lt PARAM gt lt PARAM gt _UNCERTAINTY _FillValue lt Y gt lt PARAM gt _UNCERTAINTY units lt Y gt Uncertainty of the data given in lt PARAM gt long_name type char Required fixed value _ FillValue Float Required units type char Required Must be the same as lt PARAM gt units Example Sea temperature with QC fields Float TEMP TIME DEPTH TEMP standard_name sea_water_temperature TEMP units degree_Celsius TEMP FillValue 99999 f TEMP long_name sea water tem

OceanSITES Data Format Reference Manual - Archimer

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