Product User Manual for “Precipitation products from
Contents
1. Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 Mef Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 i a CRPh v1 0 Page 1 29 NWC SAF S stats de Meteorolog The EUMETSAT Network of Satellite Application Facilities Support to Nowcasting and Very Short Range Forecasting Product User Manual for Precipitation products from Cloud Physical Properties PPh PGE14 PCPh v1 0 amp CRPh v1 0 SAF NWC CDOP2 INM PUM 14 Issue 1 Rev 0 1 4 December 2014 Applicable to SAFNWC MSG version 2013 Prepared by AEMET NWCSAF gt Amet Product User Manual for Precipitation Code products from Cloud Physical Issue CRPh v1 0 Page SAF NWC CDOP2 INM PUM 14 1 0 1 Date 4 December 2014 Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 2 29 Function REPORT SIGNATURE TABLE Cecilia Marcos AEMET Prepared by Antonio Rodriguez AEMET 4 December 2014 Reviewed by Marcelino Manso AEMET PF 4 December 2014 Pilar Fern ndez Authorised by SAFNWC Project Manager 4 December 2014 Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI2. including the input data and the outputs of the products It also gives information about the algorithm s implementation and configuration 1 2 SCOPE OF OTHER DOCUMENTS The Algorithm Theoretical Basis Document contains information about the product objectives the algorithm scientific description the needed input data and the output product AD 1 The Validation Report version v1 0 of the PGE14 document AD 2 showing the validation results for PGE14 v1 0 that gives information about the extended validation performed over Spain for a complete year The Interface Control Documents ICD 3 AD 3 defines the format of the output products generated by the SAFNWC MSG software The Interface Control Documents ICD 1 AD 4 describes the External and Internal Interfaces of the SAFNWC MSG software 1 3 SOFTWARE VERSION IDENTIFICATION This document contains practical information on the characteristics of the PPh algorithm implemented in the delivery 2013 of the SAFNWC MSG package This delivery corresponds to PPh PGE14 version 1 0 of PCPh and version 1 0 of CRPh 1 4 DEFINITIONS ACRONYMS AND ABBREVIATIONS AEMET Agencia Estatal de Meteorologia ATBD Algorithm Theoretical Basis Document COT Cloud Optical Thickness CRPh Convective Rainfall Rate from Cloud Physical Properties CSI Critical Success Index Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date
3. 07 13 from Cloud Physical Properties PPh PGE14 J Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 8 29 NWCSAF eo Title AD 3 SAFNWC MSG Output Products Format SAF NWC CDOP2 INM SW ICD F 15 07 13 Definition 3 0 0 1 2 AD 4 Interface Control Document for the External SAF NWC CDOP2 INM SW ICD 15 07 13 and Internal Interfaces of the SAFNWC MSG 1 AD 5 NWC SAF Product Requirements Document NWC CDOP2 SAF AEMET MGT ia 15 07 13 PRD Table 1 List of Applicable Documents 1 5 2 Reference Documents Reference RD 1 Daniel Rosenfeld William L Woodley Amit Lerner Guy Kelman Daniel T Lindsey 2008 Satellite detection of severe convective storms by their retrieved vertical profiles of cloud particle effective radius and thermodynamic phase J Geophys Res D4 113 RD 2 Table 2 List of Referenced Documents Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 9 29 de Meteor NWCSAF eo 2 PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH PRODUCT 2 1 DES
4. 4 December 2014 Mef Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 a i CRPh v1 0 Page 7 29 CT Cloud Type CWP Cloud Water Path EUMETSAT European Organisation for the Exploitation of Meteorological Satellites FAR False Alarm Ratio ICD Interface Control Document ICP Illumination Conditions Parameter IQF Illumination Quality Flag IR Infrared MAE Mean Absolute Error ME Mean Error MSG Meteosat Second Generation NWC SAF Satellite Application Facility for Nowcasting PC Percentage of Corrects PCPh Precipitating Clouds from Cloud Physical Properties PGE Product Generation Element POD Probability of Detection PoP Probability of Precipitation PPh Precipitation from Cloud Physical Properties Reff Effective Radius RMSE Root Mean Square Error RR Rain Rate SAF Satellite Application Facility SEVIRI Spinning Enhanced Visible and Infrared Imager SW Software 1 5 REFERENCES 1 5 1 Applicable Documents For dated references subsequent amendments to or revisions of any of these publications do not apply For undated references the current edition of the document referred applies Algorithm Theoretical Basis Document for Properties PPh PGE14 PCPh v1 0 amp CRPh v1 0 SAF NWC CDOP2 INM SCI ATB 1 0 15 07 13 Precipitation products from Cloud Physical D 14 PCPh v1 0 amp CRPh v1 0 Validation Report for Precipitation products SAF NWC CDOP2 INM SCI VR 1 1 0 15
5. PCPh and CRPh products This file is placed in the SAFNWC config directory The CRPh product related parameters refers to ancillary datasets numerical model data lightning algorithm and parallax correction The complete list of these parameters and the explanation of the most useful ones is available on List of configuration parameters of this manual Region configuration file region cfg This file set the dimensions and positions where PGE14 products will be obtained and is located in SAFNWC config directory 3 3 2 Configurable parameters for Convective Rainfall Rate from Cloud Physical Properties CRPh Model configuration file contains configurable items in the product generation process such as corrections to be run NWP parameters to be used by the PGE coefficients etc The PPh model configuration file needed for the execution of PGE14 must be placed at the SAFNWC config directory The only constraint in the use of any name is the key used to specify the parameters to be used from NWP models NWP_PARAM The use of this keyname is mandatory and will be used by a pre processing task in charge of remapping NWP incoming files in GRIB format 3 3 2 1 Keywords table for Convective Rainfall Rate from Cloud Physical Properties CRPh The PGE14 model configuration file contains the following information applicable to CRPh product Keyword Description Type Default Value s PGE_ID Identifier of the PGE Chain of PGE14
6. PGEO02 take high values of CWP so a rain rate higher than 0 mm h is assigned erroneously It is highly recommended to apply parallax correction for a better location of precipitation areas with respect to the ground below There exists a high dependence on illumination conditions for this product It must be borne in mind that these kind of cloud top based precipitation indirect methods necessarily have uncertainties Although not found during the calibration and validation processes according to the literature it is possible to find small ice particles in high level strong updrafts of deep convective clouds RD 1 This could cause erroneous rain rate estimations 3 6 EXAMPLE OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH VISUALIZATION Below is shown an image of the instantaneous rain rates CRPh product It has been obtained at full resolution 1 o peril ty SAFNHC PGE14 Figure 7 CRPh instantaneous rain rates for 25th May 2009 at 14 00 UTC over Europe Below is shown an image of the hourly accumulation CRPh product It has been obtained at full resolution NWC SAF Product User Manual for Precipitation products from Cloud Physical Properties PPh PGE14 PCPh v1 0 amp CRPh v1 0 Code SAF NWC CDOP2 INM PUM 14 Issue 1 0 1 Date 4 December 2014 File SAF NWC CDOP2 INM SCI PUM 14_ v1 0 1 Page 29 29 mm
7. Rain Rates with CWP Rain rates estimation from geostationary satellite data can not be very accurate so trying to estimate rain rates higher than 50 mm h using this type of data is not realistic For this reason a maximum limit of 50 mm h has been established It has been seen that under some conditions rain rates assigned by this product are erroneously high In order to provide the user with information about the reliability of the estimated rain rates an illumination quality flag CRPh_IQF has been developed CRR_IQF is included as an output of the product and it must be understood as an indicator of the confidence that a forecaster can have on the rain rates estimated by the product For a better convective precipitation area location the parallax correction can be applied to this product This option is chosen by the user through the product model configuration file and it is applied by default As lightning activity can provide valuable information about convection a lightning algorithm can be applied to derive a precipitation pattern that will be combined with the CRR one computed in the previous step in order to complement it At the end of the process the final values of the CRR rainfall rates in mm h are used in order to obtain hourly accumulations and five different outputs as described in section 3 1 3 are completed Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Phys
8. User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 gt products from Cloud Physical Issue 1 0 1 Date 4 December 2014 w Z Mef Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 15 29 Nwc SAF Agencia Estatal Ge Meteoroiogia 900985 90 4 40 60 352631 57 5 80 100 117761 18 1 Table 4 False alarm ratio obtained for each PCPh probability of precipitation interval Probability of precipitation thresholds validation Green colour values in the following table mean that FAR or POD values obtained in this validation fulfill the FAR and POD target values defined in the NWC SAF Product Requirements document AD 5 Table 5 Categorical scores for PCPh algorithm taking as rainy pixels those with probability of precipitation higher than a threshold 2 5 TYPICAL KNOWN PROBLEMS AND RECOMMENDATION FOR USE This algorithm can be run only over daytime For undefined phase pixels Reff and COT values are not computed by PGE02 so a 0 probability of precipitation is assigned in these cases by the algorithm As the main inputs of the product are computed by PGEO2 there exists the need to run PGE02 previous to run PGE14 It has been observed that pixels located in the surroundings of snow according to PGEO2 take sometimes high values of CWP so a probability of precipitation higher than 0 is assigned erroneously It is highly recommended to apply parallax corr
9. User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 6 29 de Meteor NWCSAF eo 1 INTRODUCTION The EUMETSAT Satellite Application Facilities SAF are dedicated centres of excellence for processing satellite data and form an integral part of the distributed EUMETSAT Application Ground Segment http www eumetsat int This documentation is provided by the SAF on Support to Nowcasting and Very Short Range Forecasting NWC SAF The main objective of NWC SAF is to provide further develop and maintain software packages to be used for Nowcasting applications of operational meteorological satellite data by National Meteorological Services More information can be found at the NWC SAF webpage http www nwcsaf org This document is applicable to the NWC SAF processing package for Meteosat satellites SAFNWC MSG 1 1 SCOPE OF THE DOCUMENT This document is the Product User Manual PUM for the PPh PGE14 Precipitation products from Cloud Physical Properties belonging to the SAFNWC MSG software PGE14 generates two different products Precipitating Clouds from Cloud Physical Properties PCPh and Convective Rainfall rate from Cloud Physical Properties CRPh PUM document contains practical information on the characteristics of the products
10. 2 Rain amount assigned to the pixels corresponding to the Z2 area according to the lightning algorithm A detailed description of the lightning Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 i products from Cloud Physical Issue 1 0 1 Date 4 December 2014 T am AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 26 29 de Metmoroiogia NWC SAF Agencia Estatal algorithm can be found in the Algorithm Theoretical Basis Document for PGE14 AD 1 Default value 0 75 mm e RAIN_LIGHTNING_RATE_3 Rain amount assigned to the pixels corresponding to the Z3 area according to the lightning algorithm A detailed description of the lightning algorithm can be found in the Algorithm Theoretical Basis Document for PGE14 AD 1 Default value 0 25 mm e RAIN_LIGHTNING_RATE_4 Rain amount assigned to the pixels corresponding to the ZA area according to the lightning algorithm A detailed description of the lightning algorithm can be found in the Algorithm Theoretical Basis Document for PGE14 AD 1 Default value 0 10 mm e COEFF_N_LIGHTNING_A Coefficient a of the equation that modifies the rain rate according to the density of lightning around each pixel in the lightning algorithm Default value 0 45 e COEFF_N_LIGHTNING_B Coefficient b of the equation that modifies the rain rate according to the density of lightning around each p
11. 25 Table 7 Accuracy measurements for instantaneous rates Comparison among CRPh product using dierent CRPA IQF threshold Soursi e oietik 26 Table 8 Categorical scores for instantaneous rates Comparison among CRPh product using different CRP TOF thresholds srrsirsiirenissiser rE E e EE a EEE EEEa EE ITE ENE 27 Table 9 Accuracy measurements for hourly accumulations Comparison among CRPh product using different CRPh IQF thresholds isiniincninnnninnnneinieciinuamaniansdaen 27 Table 10 Categorical scores for hourly accumulations Comparison among CRPh product using different RPh TOF threshol dSiscccsissisicsevsssssiassiveescacsenscvsaersa artic enna 27 Figure 1 Function that connects Probability of Precipitation with CWP eceseeseeesteeeneeeeeeeeee 9 Figure 2 PCPR PO p lett sisrrerrinnse aenneren E EEE E EN EEE EN a TAR E E ESEE EEE t i 10 Figure 3 PCPh probability of precipitation for 11 February 2013 at 11 30 UTC over Europe 16 Figure 4 Function that connects Rain Rates with CWP cccscccsssccssseccesecesseeeeeseeesseseesseeeesaes 18 Figure 5 CRPH CRR palette cicsnninimincninaaannninnnnnn en 19 Figure 6 CRE IOP palette sssociscncnnensssahero heroa ara n E EE E EE EE EE e TNA EE EEE E EE E aaa ES 20 Figure 7 CRPh instantaneous rain rates for 25th May 2009 at 14 00 UTC over Europe 28 Figure 8 CRPh hourly accumulations for 25th May 2009 at 14 00 UTC over Europe 29 Product
12. ATE FROM CLOUD PHYSICAL PROPERTIES 3 1 DESCRIPTION OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH 17 3 1 1 Goal of Convective Rainfall Rate from Cloud Physical Properties CRPH csecscesesesseeseeeeeeeeeeeeseseeeaeeaees 17 ef Ibe Outline of Convective Rainfall Rate from Cloud Physical Properties CRPH ccececeeesesseeseeseeeeeeeeeeneeseeneees 17 3 13 Description of Convective Rainfall Rate from Cloud Physical Properties CRPh outputs ceeeeeeeeeeeee 19 3 2 IMPLEMENTATION OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CEEA e D T A E E E N A A E E E A eimenncenaetie 21 3 2 1 Installation of Convective Rainfall Rate from Cloud Physical Properties CRPh ssesssessseseseseseerrsesreesrerersees 22 3 22 Preparation of Convective Rainfall Rate from Cloud Physical Properties CRPh sesesesessssssseseseerersrsererersrsrees 22 3 2 3 Execution of Convective Rainfall Rate from Cloud Physical Properties CRPH ccesessseseeseeeeeeeeeeeteeeeeeees 22 3 3 INPUTS AND CONFIGURABLE PARAMETERS FOR CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPER TIES CRIPH sstcisveictetsieieiaicieiateiaiaisteioteiaiaicieiateisicieisisiniieietbeic deietid dence 33 1 List of inputs for Convective Rainfall Rate from Cloud Physical Properties CRPh seseseesesseeeesereseees 3 332 Configurable parameters for Convective Rainfall Rate from Cloud Physical Properties CRPh 3 4 SUMMARY OF CONVECTIVE RAINFALL RATE
13. CPh Only PCPh hdf5 product is generated NWP_PARAMO1 Parameter Temperature K NWP_PT sampling rate segment size Paa 1 interpolation method BILIN NWP_PARAMO2 Parameter Geopotential m s NWP_GEOP sampling rate segment size hoe interpolation method BILIN Table 3 Model configuration file keywords table applicable to PCPh product 2 3 2 2 Keywords description for Precipitating Clouds from Cloud Physical Properties PCPh Below there is a description of the most useful keywords defined in PGE14 model configuration file and applicable to PCPh product in order to make easier the user exploitation e APPLY PARALLAX CORR To decide whether the Parallax correction should be applied or not 1 yes 0 no e OUTPUT_PRODUCT To decide which products are to be generated ALL Both CRPh and PCPh hdf5 products are generated CRPh Only CRPh hdf5 product is generated PCPh Only PCPh hdf5 product is generated 2 4 SUMMARY OF PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH VALIDATION RESULTS The following tables summarize the validation results of PCPh product More details can be obtained from the Validation Report for Precipitation products from Cloud Physical Properties PPh PGE14 PCPh v1 0 amp CRPh v1 0 AD 2 Probability of precipitation intervals validation It should bear in mind that a region with the probability of precipitation interval A B should have 100 B lt FAR lt 100 A Product
14. CRIPTION OF PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH 2 1 1 Goal of Precipitating Clouds from Cloud Physical Properties PCPh Precipitating Clouds from Cloud Physical Properties PCPh product developed within the NWC SAF context is a Nowcasting tool that provides estimation on the probability of precipitation PoP occurrence In this context PoP is defined as the instantaneous probability that a rain rate greater than or equal to 0 2 mm h occurs at the pixel level This product can be obtained for every SEVIRI slot that is every 15 minutes in the normal mode It is also prepared to run in the Rapid Scan mode with a temporal resolution of 5 minutes 2 1 2 Outline of Precipitating Clouds from Cloud Physical Properties PCPh The PoP estimation is done using information on the cloud physical properties Effective Radius Reff and Cloud Optical Thickness COT Using these two parameters the Cloud Water Path CWP is computed The following step connects CWP with PoP for each pixel through the following relationship PoP 43 7 Ln CWP 198 1 Where PoP is the Probability of Precipitation occurrence and CWP is the Cloud Water Path gm The graph of this function can be observed in Figure 1 o o 90 80 70 60 50 40 30 20 10 Probability of Precipitation Ocurrence 0 200 400 600 800 1000 CWP g m o Figure 1 Functio
15. FROM CLOUD PHYSICAL PROPERTIES CRPH VALDA NON RESULUS ske a a aaarnas 3 4 1 Instantaneous rates 3 4 2 Hourly accumulations iscem ideni aeneis BOREN EEE E EES ONEA reL E EEAO EEE OE AOE EEES ETETE TEES 27 3 5 TYPICAL KNOWN PROBLEMS AND RECOMMENDATION FOR USE ssseccccsssecccesssccccsesccccesaeees 27 3 6 EXAMPLE OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH V OA A TON ene Cn S ee eee 28 Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 5 29 de Metecroiogis NWCSAF er List of Tables and Figures Table TT or Applicable Doc ments cusses essers state setcaatenetonstancteceteseesceaeteeonnebeecbeaetuies 8 Table2 Listor Relerenced Te TAG axes cst co ttesctetctetatnesbstotesoteiedcantcnatonsbekaboanbetekeschetebeeopbebebotubebucete 8 Table 3 Model configuration file keywords table applicable to PCPh product 0 0 0 ceeeeeseeeeeeee 14 Table 4 False alarm ratio obtained for each PCPh probability of precipitation interval 15 Table 5 Categorical scores for PCPh algorithm taking as rainy pixels those with probability of precipitation hig her than a threshold ve ee ee ee ne ere pret rere ney r rrei rer rer 15 Table 6 Model configuration file keywords table applicable to CRPh product eee
16. PUM 14_v1 0 1 eae CRPh v1 0 Page 3 29 NWCSAF ens a DOCUMENT CHANGE RECORD CHANGES 1 0 15 July 2013 29 Initial version Indications and recommendations given by the NWC SAF SW Package MSG 2013 DRR have been included 4 December 2014 Update of the information about NWP data needed for the running of PCPh and CRPh algorithms Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 4 29 NWC SAF Agencia Estatal de Meteorologi Table of contents 1 1 SCOPE OF THE DOCUMENT cricieeiriei eirean r EE r EEN 6 1 2 SCOPE OF OTHER DOCUMENT S c cssssssssssccceccesessssseesccscesssssesssscceseececesssessececeesessscesecesceeees 6 1 3 SOFTWARE VERSION IDENTIFICATION ccccccccccscccsssssssssssssssssssssssssssessescssesssesescsseeeeeeeeeeeeeeeeeeees 6 1 4 DEFINITIONS ACRONYMS AND ABBREVIATIONS cccccccescessecssccecccccceccececececcesceeseeeceeeeceeeeeeees 6 15 IRFPERENG ES E E E E EE EAE A T 13 1 Applicable Documents 1 5 2 Reference Documents 2 PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH 2 1 DESCRIPTION OF PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH 9 2 1 1 Goal of Precipitating Clouds from Cloud Physical Properties POPPI siciivssssigavscicnsincataccivesie
17. SCI PUM 14_v1 0 1 NWO SAR bree Citati de Meleci CRPh v1 0 Page 11 29 PCPh_DATAFLAG 5 bits mask indicating the processing status of each pixel 1 bit for cloud optical thickness effective radius or phase data missing 0 Cloud optical thickness effective radius and phase data are available 1 Cloud optical thickness effective radius or phase data are missing 1 bit for cloud optical thickness or effective radius no computed out of the cloud night time or undefined phase 0 cloud optical thickness and effective radius computed 1 cloud optical thickness or effective radius no computed 1 bit to indicate if phase data have been computed 0 Phase is water or ice 1 Phase not computed or undefined 1 bit for IR10 8 data missing 0 IR10 8 data available 1 IR10 8 data missing 1 bit to identify mathematical errors 0 No mathematical error 1 A mathematical error has occurred The HDF 5 output files are stored in SAFNWC export PGE14 Detailed information on the HDF 5 format file can be found in AD 3 2 2 IMPLEMENTATION OF PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH Previous condition and licences The right to use copy or modify this software is in accordance with EUMETSAT Policy for the SAFNWC MSG software package 2 2 1 Installation of Precipitating Clouds from Cloud Physical Properties PCPh The software installation procedure does not require special resources It is restricted to decompress the
18. ational mode the NWC SAF package has predefined tools coordinated by the NWC SAF Task Manager daemon which check every minute for new NWP data making automatically the spatial remapping to the predetermined regions to process on to SAFNWC tmp directory This avoids spending time in every call to PGE to make the remapping process In off line operational mode the AllMapping script allows to do the spatial remapping This information is used by default for parallax correction In case of lack of NWP parameters parallax correction will be run using a climatological profile There are no studies on the impact of NWP data horizontal and temporal resolutions on the corrected position of the rainy pixels throughout parallax correction at this time Some studies are expected to be done in this line in the future NWP vertical resolution required by parallax correction is the following Temperature at 1000 925 850 700 500 400 300 250 and 200 hPa Geopotential at 1000 925 850 700 500 400 300 250 and 200 hPa Ancillary data sets Climatological profile is necessary as a back up for Parallax correction in case NWP is not available This information is included in the software package and is located in the SAFNWC import Aux_data PGE14 directory Lightning information file for CRPh product A file with information on every lightning stroke occurred in a time interval is mandatory to choose the option of adjusting the CRPh preci
19. ble items in the product generation process such as corrections to be run NWP parameters to be used by the PGE etc The PPh model configuration file needed for the execution of PGE14 must be placed at the SAFNWC config directory The only constraint in the use of any name is the key used to specify the parameters to be used from NWP models NWP_PARAM The use of this keyname is mandatory and will be used by a pre processing task in charge of remapping NWP incoming files in GRIB format 2 3 2 1 Keywords table for Precipitating Clouds from Cloud Physical Properties PCPh The PGE14 model configuration file contains the following information applicable to PCPh product Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 a Mef Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 14 29 NWC SAF Agencia Estats de Metroroiogu g Keyword Description Type Default Value s PGE_ID Identifier of the PGE Chain of PGE14 characters SEV_BANDS SEVIRI channels to be used by PGE14 Chain of IR108 characters APPLY_PARALLAX_CORR Indicator whether the Parallax correction should Integer 1 be applied or not 1 yes 0 no OUTPUT_PRODUCT Products to be generated Chain of ALL characters ALL Both CRPh and PCPh hdf5 products are generated CRPh Only CRPh hdf5 product is generated P
20. characters SEV_BANDS SEVIRI channels to be used by PGE14 Chain of IR108 characters APPLY_PARALLAX_CORR Indicator whether the Parallax correction should Integer 1 be applied or not 1 yes 0 no OUTPUT_PRODUCT Products to be generated Chain of ALL characters ALL Both CRPh and PCPh hdf5 products are generated CRPh Only CRPh hdf5 product is generated PCPh Only PCPh hdf5 product is generated NWC SAF 8 Eta oe Meteor Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 25 29 Indicator whether the Lightning information Integer 0 should be used or not 1 yes 0 no Time interval to consider lightning data files Integer 15 Rain rate parameter 1 linked to observed Real 2 3 lightning Rain rate parameter 2 linked to observed Real 0 75 lightning Rain rate parameter 3 linked to observed Real 0 25 lightning Rain rate parameter 4 linked to observed Real 0 1 lightning Coefficient a to be applied during the Real 0 45 lightning adjustment function Coefficient b to be applied during the Real 0 7 lightning adjustment function Parameter Temperature K NWP_PT 3 P Chain of sampling rate segment size characters 1 interpolation method BILIN Parameter Geopotentia
21. distribution file a gz compressed tar file and to successfully build the executable PGE 14 file to be stored into the SAFNWC bin directory Once the PGE14 of the SAFNWC MSG is installed and configured in the system its operational use requires the definition of some Configuration files in order to select the regions to be processed and some needed configurable parameters The automatic set of pre defined time scheduling of the preparation step is in Programmed Task Definition Files Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 12 29 NWCSAF nns 2 2 2 Preparation of Precipitating Clouds from Cloud Physical Properties PCPh The configuration file in charge of the region where the product is going to be run has an optional name and cfg extension This file contains the region centre location and the size image When the application is installed some region configuration files appear in s AFNWC config Each of them corresponds to a different region nevertheless users can create their own region configuration file The configuration file in charge of the product settings is the PGE14 model configuration file that has an optional name and cfm extension Through this file the user can configure the way the pro
22. duct is going to be run by choosing options such as the parallax correction to be used In order to apply parallax correction NWP data List of inputs for Precipitating Clouds from Cloud Physical Properties PCPh have to be available in SAFNWC import NWP_data directory 2 2 3 Execution of Precipitating Clouds from Cloud Physical Properties PCPh The execution step is the real time process of the PPh images over the region This process consists of the launch of the command PGE14 along with the required parameters slot region file name and model configuration file PCPh requires mainly five steps e First step consists of an initialisation which performs the environment settings for a given region Check the existence of the required PGE0 files e Second step is intended to read the external PGE02 files e Third step is the computation of CWP e Fourth step computes PoP from CWP as well as PCPh_QUALITY and PCPh_DATAFLAG e Fifth step applies Parallax correction if chosen PCPh_QUALITY is updated e Last step writes the product outputs in NWC SAF format 2 3 INPUTS AND CONFIGURABLE PARAMETERS FOR PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH 2 3 1 List of inputs for Precipitating Clouds from Cloud Physical Properties PCPh PGE02 Cloud type CT physical properties CT PGE02 Phase COT and Reff parameters are mandatory inputs to PCPh The Phase will be read from PGEO2 CT HDF 5 which must be located in SAFNWC
23. ection for a better location of precipitation areas with respect to the ground below This product obtains the best results for convective events Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 16 29 NWCSAF 2 6 EXAMPLE OF PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH VISUALIZATION Below is shown an example of the PCPh product It has been obtained at full resolution Pev ae ELX p s Sy PRECIPITATION j lt PROBABILITY 100 Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 17 29 te Met roe NWCSAF ro 3 CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH PRODUCT 3 1 DESCRIPTION OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH 3 1 1 Goal of Convective Rainfall Rate from Cloud Physical Properties CRPh Convective Rainfall Rate from Cloud Physical Properties CRPh product developed within the NWC SAF context is a Nowcasting tool that provides information on convective and stratiform associated to convection instantaneous rain rates a
24. esivosiactensiivts ns cancesenesin 212 Outline of Precipitating Clouds from Cloud Physical Properties PCPh 2 1 3 Description of Precipitating Clouds from Cloud Physical Properties PCPh outputs s ssssessseerereressrsesersrsree 10 2 2 IMPLEMENTATION OF PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH 11 2 2 1 Installation of Precipitating Clouds from Cloud Physical Properties PCPh sssesessssseseseeersserseesrsrsrsrsrrseseseee 11 2 2 2 Preparation of Precipitating Clouds from Cloud Physical Properties PCPh ccsesssesessesseesseeeseseeesereeeaeeaees 12 22 3 Execution of Precipitating Clouds from Cloud Physical Properties PCPI sascisscvs cuvtctessussssssvestevenccdicasoissoseseesees 12 23 INPUTS AND CONFIGURABLE PARAMETERS FOR PRECIPITATION CLOUDS FROM CLOUD PHYSICAL PROPERTIES POPH oiire tein terene ae hss es desc sss ian enin Ena Ae es 23 1 List of inputs for Precipitating Clouds from Cloud Physical Properties PCPh 232 Configurable parameters for Precipitating Clouds from Cloud Physical Properties PCPh 2 4 SUMMARY OF PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH AV AICMATION RESUS 31525315555 see tacceeets bata bet aaa aaa 14 2 5 TYPICAL KNOWN PROBLEMS AND RECOMMENDATION FOR USE cccesecsesececceecccecccccecceceeeeeees 15 2 6 EXAMPLE OF PRECIPITATING CLOUDS FROM CLOUD PHYSICAL PROPERTIES PCPH My US ATOZ ART TO EE EEEE EEE EEEE AE A EEEE EAEE TEA A 16 3 CONVECTIVE RAINFALL R
25. export PGE02 directory COT and Ref parameters will be read from temporary files generated by PGEO2 located in SAFNWC tmp directory Satellite imagery IR10 8 SEVIRI brightness temperature at full IR spatial resolution is a mandatory input to compute Parallax Correction It must be placed by the user in HRIT format in the SAFNWC import SEVIRI_ data directory Then it will be extracted on the desired region by SAFNWC software package Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWC SAR MO Estati de Meterteg CRPh v1 0 Page 13 29 Numerical model The NWP files must be located in SAFNWC import NWP_data directory In real time operational mode the NWC SAF package has predefined tools coordinated by the NWC SAF Task Manager daemon which check every minute for new NWP data making automatically the spatial remapping to the predetermined regions to process on to sAFNWC tmp directory This avoids spending time in every call to PGE to make the remapping process In off line operational mode the AllMapping script allows to do the spatial remapping This information is used by default for parallax correction In case of lack of NWP parameters parallax correction will be run using a climatological profile There are no studies on
26. h the output data from the previous step CRPh mm h values CRPh_QUALITY and CRPh_DATAFLAG are updated Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 23 29 de Meteor NWCSAF Eno e Last step computes the hourly accumulation updates CRR_DATAFLAG and writes the product outputs in NWC SAF format 3 3 INPUTS AND CONFIGURABLE PARAMETERS FOR CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH 3 3 1 List of inputs for Convective Rainfall Rate from Cloud Physical Properties CRPh PGEO02 Cloud type CT physical properties CT PGE02 Phase COT and Ress parameters are mandatory inputs to CRPh The Phase will be read from PGEO2 CT HDF 5 which must be located in SAFNWC export PGE02 directory COT and Ref parameters will be read from temporary files generated by PGEO2 located in SAFNWC tmp directory Satellite imagery IR10 8 SEVIRI brightness temperature at full IR spatial resolution is a mandatory input to compute Parallax Correction It must be placed by the user in HRIT format in the SAFNWC import SEVIRI_ data directory Then it will be extracted on the desired region by SAFNWC software package Numerical model The NWP files must be located in SAFNWC import NWP_data directory In real time oper
27. have been computed 0 Phase is water or ice 1 Phase not computed or undefined 1 bit for IR10 8 data missing 0 IR10 8 data available 1 IR10 8 data missing 1 bit to identify mathematical errors 0 No mathematical error 1 A mathematical error has occurred 2 bits for the hourly accumulation CRR output status 0 All required scenes were available 1 One previous CRR scene is missing 2 At least two previous CRR scenes are missing no consecutive 3 At least two previous CRR scenes are missing some are consecutive 1 bit for the status of the CRR pixels used to compute the hourly accumulation 0 All the pixels used in the computing of the hourly accumulation have their CRR_DATAFLAG bits set to 0 1 At least one of the pixels used in the computing of the hourly accumulation has at least one of its CRR_DATAFLAG bits set to 1 The HDF 5 output files are stored in SAFNWC export PGE14 Detailed information on the HDF 5 format file can be found in AD 3 3 2 IMPLEMENTATION OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH Previous condition and licences The right to use copy or modify this software is in accordance with EUMETSAT Policy for the SAFNWC MSG software package Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWO SAR A
28. ical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWC SAR Mei Estati de Meter CRPh v1 0 Page 19 29 3 1 3 Description of Convective Rainfall Rate from Cloud Physical Properties CRPh outputs CRPh product is coded in HDF5 format The available outputs are the following CRPh_CRR This output provides rainfall rates from 0 0 to 51 0 mm h with a step of 0 2 mm h and includes the following palette CONVECTIVE RAINFALL RATE mm h 2 1 0 2 o SAFNWC PGE14 Figure 5 CRPh_CRR palette CRPh_ACCUM The hourly accumulations have been computed using the rainfall rates from the images in the last hour This output provides precipitation accumulations from 0 0 to 51 0 mm with a step of 0 2 mm and includes a palette that uses the same thresholds and colours as the intensities output palette CRPh_IOF CRR_IQF is a flag that provides information on the confidence that a user can have on the estimated rain rates according to the illumination conditions and viewing angles The colour scale provided with the product is divided into five intervals as can be observed in Figure 6 Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWO SAR Aeneis Es
29. ixel in the lightning algorithm Default value 0 7 3 4 SUMMARY OF CONVECTIVE RAINFALL RATE FROM CLOUD PHYSICAL PROPERTIES CRPH VALIDATION RESULTS The following tables summarize the validation results of CRPh algorithm More details can be obtained from the Validation Report for Precipitation products from Cloud Physical Properties PPh PGE14 PCPh v1 0 amp CRPh v1 0 AD 2 Green colour values in tables mean that FAR or POD values obtained in this validation fulfill the FAR and POD target values defined in the NWCSAF Product Requirement document AD 5 3 4 1 Instantaneous rates Accuracy statistics Table 7 Accuracy measurements for instantaneous rates Comparison among CRPh product using different CRPh_IQF thresholds Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 a products from Cloud Physical Issue 1 0 1 Date 4 December 2014 i EMef Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 e CRPh v1 0 Page 27 29 NWCSAF OCR ere Categorical scores Algorithm FAR POD CSI PC CRPh_IQF 20 27 4 84 2 63 9 73 9 CRPh_IQF 2 20 27 4 84 2 63 9 73 9 CRPh_IQF 40 27 2 84 2 64 1 74 1 CRPh_IQF 2 60 26 4 84 5 64 8 74 9 CRPh_IQF 80 25 4 84 9 65 9 76 0 Table 8 Categorical scores for instantaneous rates Comparison among CRPh product using different CRPh_IQF thresholds 3 4 2 Hourly accumulations Accuracy statis
30. l m s NWP_GEOP i Chain of sampling rate segment size diaracters 1 interpolation method BILIN Table 6 Model configuration file keywords table applicable to CRPh product 3 3 2 2 Keywords description for Convective Rainfall Rate from Cloud _Physical Properties CRPh Below there is a description of the most useful keywords defined in PGE14 model configuration file applicable to CRPh product in order to make easier the user exploitation APPLY_PARALLAX CORR To decide whether the Parallax correction should be applied or not 1 yes 0 no OUTPUT_PRODUCT To decide which products are to be generated ALL Both CRPh and PCPh hdf5 products are generated CRPh Only CRPh hdf5 product is generated PCPh Only PCPh hdf5 product is generated APPLY_LIGHTNING To decide whether the lightning information will be used keyword set to 1 or not keyword set to 0 to combine the CRR precipitation pattern By default this keyword is set to 0 LIGHTNING_DELTA_TIME Time interval before the scanning time of the processing region centre where the lightning occurrences will be taken into account by the lightning algorithm Default value 15 min RAIN_LIGHTNING_RATE_1 Rain amount assigned to the pixels corresponding to the Zl area according to the lightning algorithm A detailed description of the lightning algorithm can be found in the Algorithm Theoretical Basis Document for PGE14 AD 1 Default value 2 30 mm RAIN_LIGHTNING_RATE_
31. n that connects Probability of Precipitation with CWP Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 Lae CRPh v1 0 Page 10 29 NWCSAF enes 2 1 3 Description of Precipitating Clouds from Cloud Physical Properties PCPh outputs PCPh product is coded in HDFS5 format The available outputs are the following PCPh PC The PCPh_PC output provides an estimation of the probability of precipitation from 0 to 100 of probability The probability of precipitation is given as an integer value that takes values from 0 to 100 The colour scale delivered with the product is divided into five PoP intervals as can be observed in Figure 2 PRECIPITATION PROBABILITY Figure 2 PCPh_PC palette PCPh_QUALITY 2 bits mask indicating if parallax correction has been applied for each pixel 1 bit for parallax correction 0 No correction 1 Corrected by parallax 1 bit for the filled holes after parallax correction 0 No hole due to the parallax correction 1 Hole due to the parallax correction filled by a median filter Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM
32. ncia Estati de Melenig CRPh v1 0 Page 22 29 3 2 1 Installation of Convective Rainfall Rate from Cloud Physical Properties CRPh The software installation procedure does not require special resources It is restricted to decompress the distribution file a gz compressed tar file and to successfully build the executable PGE14 file to be stored into the SAFNWC bin directory Once the PGE14 of the SAFNWC MSG is installed and configured in the system its operational use requires the definition of some Configuration files in order to select the regions to be processed and some needed configurable parameters The automatic set of pre defined time scheduling of the preparation step is in Programmed Task Definition Files 3 2 2 Preparation of Convective Rainfall Rate from Cloud Physical Properties CRPh The configuration file in charge of the region where the product is going to be run has an optional name and cfg extension This file contains the region centre location and the size image When the application is installed some region configuration files appear in s AFNWC config Each of them corresponds to a different region nevertheless users can create their own region configuration file The configuration file in charge of the product settings is the PGE14 model configuration file that has an optional name and cfm extension Through this file the user can configure the way the product is going to be run choosing
33. nd hourly accumulations This product can be obtained for every SEVIRI slot that is every 15 minutes in the normal mode It is also prepared to run in the Rapid Scan mode with a temporal resolution of 5 minutes 3 1 2 Outline of Convective Rainfall Rate from Cloud Physical Properties CRPh The convective rainfall rate estimation is done using information on the cloud physical properties Effective Radius Re and Cloud Optical Thickness COT Using these two parameters the Cloud Water Path CWP is computed Depending on some Re and CWP thresholds the precipitation area is enclosed Only in those pixels belonging to the precipitation area the rain rate is computed To assign an instantaneous rain rate to each pixel the following relationship between CWP and precipitation intensity is applied 2 RR 50 51 exp 0 5 pel 1700 Where RR is the Rainfall Rate mmh and CWP is the Cloud Water Path gm The graph of this function can be observed in Figure 4 Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWC SAR Mei Estati de Meese CRPh v1 0 Page 18 29 CTMP function 60 50 40 30 20 Rain rates mm h 10 0 1000 2000 3000 4000 5000 6000 CWP g m Figure 4 Function that connects
34. options such as parallax correction to be applied or lightning information to be used In order to apply parallax correction NWP data List of inputs for Convective Rainfall Rate from Cloud Physical Properties CRPh have to be available in SAFNWC import NWP_data directory In order to use the lightning information the Lightning information file for PGE14 List of inputs for Convective Rainfall Rate from Cloud Physical Properties CRPh have to be available in SAFNWC import Obs data directory 3 2 3 Execution of Convective Rainfall Rate from Cloud Physical Properties CRPh The execution step is the real time process of the PPh images over the region This process consists of the launch of the command PGE14 along with the required parameters slot region file name and model configuration file CRPh requires mainly five steps e First step consists of an initialisation which performs the environment settings for a given region Check the existence of the required PGEO2 files e Second step is intended to read the external PGE02 files e Third step is the computation of CWP e Fourth step computes the precipitation area and the rain rates within the computed precipitation area as well as CRPh_QUALITY CRPh_DATAFLAG and CRPh_IQF e Fifth step applies Parallax correction if chosen CRPh _QUALITY is updated e Sixth step computes rain rates from lightning information if this option has been chosen This data are combined wit
35. pitation pattern with the lightning information provided by ground based lightning detection networks Information about the Lightning information file for CRPh product structure can be found in the Interface Control Document AD 4 This file must be located in AFNWC import Obs_data Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 Aa AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 lt CRPh v1 0 Page 24 29 NWCSAF Estatal de Metroroioga The CRR lightning algorithm and the coefficients applied have been derived for Spain using the lightning information from the AEMET lightning detection network Ground based lightning detection networks provide information with different performances in detection efficiency and location accuracy For this reason the keyword APPLY_LIGHTNING in the model configuration file is set to 0 and by default the lightning information is not used Before to use the lightning algorithm it is highly recommended to the user to adapt the lightning coefficients to the specific performances of the used lightning detection network through the appropriate keywords in the model configuration file Model configuration file for PGE14 safnwc_pge14 cfm PGE14 model configuration file contains configurable system parameters in the generation process of both
36. tati de Meteori CRPh v1 0 Page 20 29 ILLUMINATION QUALITY FLAG Yo 100 40 0 Figure 6 CRR_IQF palette CRPh _QUALITY 3 bits mask indicating if parallax correction and lighting information has been applied for each pixel 1 bit for parallax correction 0 No correction 1 Corrected by parallax 1 bit for the filled holes after parallax correction 0 No hole due to the parallax correction 1 Hole due to the parallax correction filled by a median filter 1 bit for lightning information used 0 No lightning information used 1 Lightning information used Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 NWO SAR bree Estati de Melenig CRPh v1 0 Page 21 29 CRPh_DATAFLAG 8 bits mask indicating the processing status of each pixel 1 bit for cloud optical thickness effective radius or phase data missing 0 Cloud optical thickness effective radius and phase data are available 1 Cloud optical thickness effective radius or phase data are missing 1 bit for cloud optical thickness or effective radius no computed out of the cloud night time or undefined phase 0 cloud optical thickness and effective radius computed 1 cloud optical thickness or effective radius no computed 1 bit to indicate if phase data
37. the impact of NWP data horizontal and temporal resolutions on the corrected position of the rainy pixels throughout parallax correction at this time Some studies are expected to be done in this line in the future NWP vertical resolution required by parallax correction is the following Temperature at 1000 925 850 700 500 400 300 250 and 200 hPa Geopotential at 1000 925 850 700 500 400 300 250 and 200 hPa Ancillary data sets Climatological profile is necessary as a back up for Parallax correction in case NWP is not available This information is included in the software package and is located in the SAFNWC import Aux_data directory Model configuration file for PGE14 safnwc_pge1l4 cfm PGE14 model configuration file contains configurable system parameters in the generation process of both PCPh and CRPh products This file is placed in the SAFNWC config directory The PCPh product related parameters refers to ancillary datasets numerical model data and parallax correction The complete list of these parameters and the explanation of the most useful ones is available on List of configuration parameters of this manual Region configuration file region cfg This file set the dimensions and positions where PGE14 products will be obtained and is located in SAFNWC config directory 2 3 2 Configurable parameters for Precipitating Clouds from Cloud Physical Properties PCPh Model configuration file contains configura
38. tics Algorithm N Mean ME MAE RMSE CRPh_IQF 20 297809 0 43 0 68 0 94 2 55 CRPh_IQF 2 20 297794 0 43 0 68 0 94 2 55 CRPh_IQF 2 40 270484 0 42 0 59 0 85 2 35 CRPh_IQF 2 60 180351 0 40 0 40 0 67 1 84 CRPh_IQF 2 80 83630 0 39 0 24 0 51 1 35 Table 9 Accuracy measurements for hourly accumulations Comparison among CRPh product using different CRPh_IQF thresholds Categorical scores Algorithm FAR POD CSI PC CRPh_IQF 20 47 2 91 0 50 2 65 6 CRPh_IQF 20 47 2 91 0 50 2 65 6 CRPh_IQF 2 40 47 4 90 8 50 0 65 6 CRPh_IQF 2 60 47 3 90 9 50 1 66 3 CRPh_IQF 2 80 47 0 91 8 50 6 66 8 Table 10 Categorical scores for hourly accumulations Comparison among CRPh product using different CRPh_IQF thresholds 3 5 TYPICAL KNOWN PROBLEMS AND RECOMMENDATION FOR USE This algorithm can be run only over daytime Product User Manual for Precipitation Code SAF NWC CDOP2 INM PUM 14 products from Cloud Physical Issue 1 0 1 Date 4 December 2014 AEMet Properties PPh PGE14 PCPh v1 0 amp File SAF NWC CDOP2 INM SCI PUM 14_v1 0 1 CRPh v1 0 Page 28 29 NWCSAF For undefined phase pixels Reff and COT values are not computed by PGE02 so a 0 mm h rain rate is assigned in these cases by the algorithm As the main inputs of the product are computed by PGE02 there exists the need to run PGE02 previous to run PGE14 It has been observed that pixels located in the surroundings of snow according to
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