MOD09 (Surface Reflectance) User's Guide
Contents
1. 4 1 500 m and 1 km resolution data state QA Collection at 23 8 4 2 1 km resolution data state QA Collection Ai 24 8 5 Geolocation flags Collection o cost couse ties ote om hon dete abound iat abad gut ade d sens 25 8 6 Scan value information Collection a crescents e o ea edu Rad den Seca REUS 26 8 7 Internal climatology Collection 5 miii aid to Fee edes eee ri tr t Pe didas 2 8 8 Orbit and coverage Collection Ts pd EP t pa b Rate p nin ale egi d A oti quat 28 Sn cA E 29 If there is something else you would like to see in the MODO09 User s Guide please write to us at mod09 ltdri org We will be happy to consider your suggestions Notes a A number of significant improvements have also been introduced into the AC algorithm including the LUT format modification for a more accurate interpolation of atmospheric parameters and the use of dynamic aerosol models and ocean bands for improved aerosol retrieval over land surface A de tailed description of these changes can be found at the MODIS Land Quality Assessment Web site http landweb nascom nasa gov cgi bin QA WWNW newPage cgi b Please check the product availability on our Web site at http modis sr Itdri org 1 Product description MOD09 MODIS Surface Reflectance is a seven band product computed from the MODIS Level 1B land bands 1 620 670 nm 2 841 876 nm 3 459 479 4 545 565 nm 5 1230 1250 nm 6 1628 1652 nm and 7 2105 2155 nm The produ2. A software environment where data are first viewed in a tree like interface and then optionally loaded and visualized in a variety of ways Link http www space research org 6 Data product granule ID Example 1 MOD09GHK A2006351 h18v06 004 2006353163945 hdf MODO9GHK product name MODIS Terra Surface Reflectance Daily L2G Global 500 m A2000351 Acquisition year 2006 and Julian day 351 h18v06 tile ID see MODIS sinusoidal grid 004 Collection 4 2006353163945 Production year 2006 Julian day 353 and time 16 39 45 Example 2 MOD09CMG A2000338 005 2006332091104 hdf MODO9CMG product name MODIS Terra Surface Reflectance Daily L3 Global 0 05Deg CMG A2000338 Acquisition year 2000 and Julian day 338 005 Collection 5 2006332091104 Production year 2006 Julian day 332 and time 09 11 04 7 Data product grids 7 1 MODIS sinusoidal grid The Earth s surface is divided into tiles 10 x 10 h gt Figure 1 The MODIS sinusoidal grid with an example tile shown as a RGB image produced from the MODIS data acquired on December 3 2006 over the US East cost This product Granule ID is MOD09A1 A2000337 h11v05 005 2006342055602 hdf 7 2 Climate Modeling Grid CMG The resolution of CMG is 0 05 This grid is primarily used in climate studies VA EST esr A A ee NP ua de KI en A Di 3 S EZ a L L Figure 2 An example of MODIS product based on the Climate Modeling Grid The show
3. day 16 bit unsigned integer Bit field 16 bit unsigned integer Fill Value 28672 28672 28672 28672 28672 28672 28672 4294967295 0 0 0 Valid Range 100 16000 100 16000 100 16000 0 4294966531 18000 18000 13 100 16000 100 16000 100 16000 100 16000 0 57343 1 366 8 1 5 MOD09CMG MYD09CMG MODIS Terra Aqua Surface Reflectance Daily L3 Global 0 05Deg CMG Product description MOD09CMG MYD09CMQ provides MODIS band 1 7 surface reflectance at 0 05 degree resolution This product is based on a Climate Modeling Grid CMG for the purpose of being used in climate simulation models Figure 7 A MOD09CMG RGB image composed of surface reflectance data measured by bands 1 red 4 green and 3 blue on December 7 2000 The MODIS product granule ID is MOD09CMG A2000341 005 2006347161131 hdf 14 Table 5 Science Data Sets for MOD09CMG MYDO9CMG Science Data Sets Fill HDF Layers 19 Bit Type value Coarse Resolution Surface Reflectance 16 bit signed Coarse Resolution Surface Reflectance 16 bit signed Coarse Resolution Surface Reflectance 16 bit signed Coarse Resolution Surface Reflectance 16 bit signed Coarse Resolution Surface Reflectance 16 bit signed Band 5 1230 1250 nm oe Coarse Resolution Surface Reflectance 16 bit signed Coarse Resolution Surface Reflectance 16 bit signed Band 7 2105 2155 nm E Coarse Resolut
4. determined by overall pixel quality and observational coverage are matched geographically according to corresponding 250 m Pointer Files MODPTQKM see Section 9 Quality information for this product is provided at three different levels of detail for individual pixels for each band and each resolution and for the whole file Figure 8 An example of MYDO9GQK surface reflectance product The corresponding MODIS data were collected on May 26 2004 over Brazil South America Granule ID MYDO09GQK A2004148 h12v09 004 2004151002653 hdf Upper image Band 2 near infrared Surface Reflectance shown on a gray scale Lower image false color RGB combination of bands 2 1 and 1 Vegetation appears red water appears blue and clouds appears white A land sea mask has been used to remove deep ocean water which appears black Table 6 Science Data Sets for MOD09GQK MYD09GQK Scale Fac DS s Units Valid Range tor y divide by 250m Surface Reflectance Band 1 P 620 670 nm 16 bit signed integer 28672 100 16000 110000 250m Surface Reflectance Band 2 ok 841 876 nm 16 bit signed integer 28672 100 16000 10000 50m Reflectance Band Quality c f see Table 11 Bit field 16 bit unsigned integer 2995 0 4096 i 15 NA Orbit and coverage see Table 18 Bit field 8 bit unsigned integer 0 255 INA Number of Observations 8 bit signed integer 1 0 8 2 2 MOD09GHK MYD09GHK MODIS Terra Aqua Surface Reflec
5. 01 corrected product produced at less than ideal quality some or all bands MODLAND QA bits 10 corrected product not produced due to cloud effects all bands corrected product not produced due to other reasons some or all bands may be fill value Note that a value of 11 overrides a value of 01 11 cloud state 00 clear 01 cloudy 10 mixed 11 not set assumed clear 0000 highest quality 1000 dead detector data interpolated in L1B 1001 solar zenith gt 86 degrees 1010 solar zenith gt 85 and lt 86 degrees band 1 data quality 1011 missing input four bit range internal constant used in place of climatological data for at least one at mospheric constant 1100 1101 correction out of bounds pixel constrained to extreme allowable value 1110 L1B data faulty 1111 not processed due to deep ocean or clouds band 2 data quality SAME AS BAND ABOVE four bit range atmospheric correc yes tion performed no adjacency correction yes performed spare unused 21 8 3 2 500 m and coarse resolution QA Table 12 500 m and coarse resolution surface reflectance data QA description 32 bit Bit Bit No Comb QC_500m Coarse Resolution QA corrected product produced at ideal quality all bands corrected product produced at less than ideal quality some or all bands corrected product not produced due to cloud effects all bands 0 1 MODLAND QA bits A corrected product not prod
6. 09Q1 MODIS Terra Aqua Surface Reflectance 8 Day L3 Global 250 m Product description MOD09Q1 MYD09Q1 provides band 1 2 surface reflectance at 250 m resolution It is a level 3 composite of MOD09GQK MYD09GQK The best observations during an 8 day period as determined by overall pixel quality and observational coverage are matched geographically according to corresponding 250 m Pointer Files MODPTQKM see Section 9 Quality information for the MOD09Q1 product is provided at three different levels of detail for individual pixels for each band and each resolution and for the whole file Figure 10 An example of MYDO9GQK surface reflectance product The corresponding MODIS data were collected in May 2004 mostly over Brazil South America Granule ID MYD09Q1 A2004145 h12v10 004 2004157154243 hdf Upper image Band 2 near infrared surface reflectance shown on a gray scale Lower image A false color RGB combination of bands 2 1 and 1 Vegetation appears red water appears blue and clouds appears white A land sea mask has been used to remove deep ocean water which appears black Table 8 Science Data Sets for MOD09Q1 MYDO09Q1 Science Data Sets c A HDF Layers 3 Units Data Type Fill Value Valid Range Scale Factor Surface Reflectance for band e 8 1 620 670 nm Reflectance 16 bit signed integer 28672 100 16000 0 0001 erp QM por band 16 bit signed integer 28672 100 16000 0 0001 Surface refle
7. K K K k k k K KK kkk 2K K se K K EOS tor NA NA 0 01 0 01 NA A E Solar Zenith Angle ai 3996 0 18000 integer 10 num observations 500m SH signed 0 127 NA B B integer sur refl b01 500m Surface iaa Reflectance Band 1 620 Reflectance 8 28672 100 16000 integer sur refl b02 500m Surface 16 bit sioned Reflectance Band 2 841 Reflectance 8 28672 100 16000 integer sur refl b03 500m Surface 16 bit sioned Reflectance Band 3 459 Reflectance 8 28672 100 16000 integer sur refl b04 500m Surface 16 bit siened Reflectance Band 4 545 Reflectance 8 28672 100 16000 integer sur refl b05 500m Surface 16 bit siened Reflectance Band 5 1230 Reflectance integer 8 28672 100 16000 sur refl b06 500m Surface 16 bit siened Reflectance Band 6 1628 Reflectance 8 28672 100 16000 integer 1652 nm sur refl b07 500m Surface 16 bit siened Reflectance Band 7 2105 Reflectance 5 28672 100 16000 integer QC_500m 500m Reflec er l tance Band Quality see BitField unsigned 79541967 Integer Mq ee Observa Percent Ta GER 0 00999999 ion coverage ege 77648258 integer q_scan 250m scan value cns 8 bit unsigned k information see Table 16 SES integer 299 RA 11 8 1 3 MOD09Q1 MYD09Q1 MODIS Terra Aqua Surface Reflectance 8 Day L3 Global 250 m Product description MOD09Q1 MYD09Q1 provides MODIS band 1 2 surface reflectance at 250 m resolution It is a level 3 com
8. MOD09 Surface Reflectance User s Guide MODIS Land Surface Reflectance Science Computing Facility Principal Investigator Dr Eric F Vermote Web site http modis sr ltdri org Correspondence e mail address mod09 ltdri org Prepared by E F Vermote and S Y Kotchenova Version 1 1 March 2008 NYDN PS L LA KR Table of Contents Proud PEN E 4 OA oet em ta sema E M tu d sendas o dos eai ax eve ie a epos een Means 4 Differences between Collection 4 and Collection 5 sse eerte 5 Data ordenes Ee e aa Deis 5 Data Viewing Ee 6 Data product granule ID ic 6 Data POS A AA 7 ee EE GE 7 7 2 Climate Modeling Grid CM 8 EE H 8 1 Description and Science Data Sets Collection 3 9 9 1 1 MODOOSGO MIEDO O ii lucas ege Facta AS 9 8 1 2 MODOIGA MYDO9GA Pm 10 8 1 3 MOD09OT M YDO9Q Lc A as A hee 12 SA MODOOA 7 NEYIDUO A KEE 13 8 15 MODOSC MGE NTYDOOG MGE copii ni iaa 14 8 2 Description and Science Data Sets Collection Visi n eite tree tato tease ra rptu d 16 8 2 1 MODOOGOK MY DOS GOK ere dE 16 982 2 MIO DUO GK CERN 17 8 2 3 MODOSO LAMY DOQQ iia Ind e 18 82 4 MODO9A TI MY DOJA cios Mes dads eege 19 82 5 MODOOGST MYDU OGST Tis EA eoi egeo DE nee 20 8 3 Data productiquality iustos eiit A Pdf Pau c das 21 L UNE resoluta EE 21 8 3 2 500 m and coarse resolution QN noe o Oc Roe e indic Ma equi ap 22 8 4 Data product state TEIBS fa oo een ete aee Was Be edit ese tdt m ep o te m dd gas 23 8
9. able 14 1 km Surface Reflectance data state QA Description 16 bit for Collection 4 Bits 10 16 contain different information in Collection 4 product compared to Collection 5 product 10 PGE11 cloud algorithm flag E G o Je fi A A A nae MODAS snowice flag A pe 13 14 BRDF correction performed es methodology ge Boston methodology Snow a EM NND e ee 8 5 Geolocation flags Collection 5 Table 15 1 kilometer geolocation flags 16 bit es u e Sensor range validity flag Digital elevation model quality flag Terrain data validity Ellipsoid intersection flag Input data flag Fill oo pu oo wu k wm o vata eon Ya 25 8 6 Scan value information Collection 5 Table 16 250 m scan value information description 8 bit 1 missing observation in quadrant 4 0 5 row 0 5 column missing observation in quadrant 3 0 5 row 0 5 column missing observation in quadrant 2 0 5 row 0 5 column missing observation in quadrant 1 0 5 row 0 5 column scan of observation in quadrant 4 0 5 row 0 5 column NEN scan of observation in quadran 5 row 0 5 column ofa 1 same scan of observation in quadrant 2 0 5 row 0 5 column i same hum 1 same scan of observation in quadrant 1 0 5 row 0 5 column 1 same ser Note The 250 m samples are for each of four quadrants within a 500 m cell The first line sample is in the upper left no
10. ct is an estimate of the surface spectral reflectance for each band as it would have been measured at ground level as if there were no atmospheric scatter ing or absorption It corrects for the effects of atmospheric gases aerosols and thin cirrus clouds 2 List of products Collection 4 Product Abbreviation Product Full Name Surface Reflectance Daily L2G Global 250 m MOD09GQK MYD09GQK Surface Reflectance Daily L2G Global 500 m MODO09GHK MYD09GHK Surface Reflectance 8 Day L3 Global 250 m MOD09Q1 MYD09Q1 Surface Reflectance 8 Day L3 Global 500 m MODO9A 1 MYDO9A1 Surface Reflectance Quality Daily L2G Global 1km MODO9GST MYDO9GST Collection 5 Product Abbreviation Product Full Name Surface Reflectance Daily L2G Global 250 m MOD09GQ MYD09GQ CMG Climate Modeling Grid 3 Differences between Collection 4 and Collection 5 The contents of MODO9 have been changed to meet the user s demand a The Daily Surface Reflectance Quality product at 1 km resolution was incorporated into the Daily Surface Reflectance product at 500 m resolution b The Daily Surface Reflectance products at 500 m and 1 km resolution have new abbreviated names A new product called Global Daily Surface Reflectance at 0 05 resolution was created This prod uct is applied on a Climate Modeling Grid CMG for the purpose of being used in climate simulation models 4 Data ordering amp browsing a EOS Earth Observing System Data Gateway The main
11. ctance 250m 16 bit unsiened quality control flags see Ta Bit field A 65535 0 4294966531 NA ble 11 integer 18 8 2 4 MOD09A1 MYD09A1 MODIS Terra Aqua Surface Reflectance 8 Day L3 Global 500 m Product description MOD09A1 MYDO9A1 is a composite of MODO9GHK MYDO9GHK The best observations during an 8 day period as determined by the overall pixel quality and observational coverage are matched geographically according to G SEN corresponding 500 m Pointer Files MODPTHKM see Section 9 Quality information for the MODO9A1 product is provided at three different levels of detail for individual pixels for each band and each resolution and for the whole file Figure 11 A MOD09A1 RGB image composed of surface reflectance measured by bands 1 red 4 green and 3 blue in May 2004 mostly over Brazil South America Granule ID MYD09A1 A2004145 h12v10 004 2004157154243 hdf Table 9 Science Data Sets for MOD09A1 MYDO9A 1 Surface reflectance 500m state flava see Table 13 Bit field 16 bit unsigned integer 65535 ov Ia Surface reflectance day of year Julian Day 16 bit unsigned integer 65535 0 366 19 8 2 5 MOD09GST MYD09GST MODIS Terra Aqua Surface Reflectance Quality Daily L2G Global 1 km Product description MODO9GST is a restructured version of the quality data in level 2 surface re flectance It summarizes the quality of the MOD09 products including atmospheric and other correc tion sta
12. f of the scan the first 5 1 km scan lines in the along track direction and the bottom half of the scan the last 5 1 km scan lines The observation coverage is the area of intersection of observation footprint and cell di vided by the area of the observation 28 9 Useful links a 250 m Pointer Files MODPTQKM Link http edcdaac usgs gov modis modptqkmv4 asp b 500 m Pointer Files MODPTQKM Link http edcdaac usgs gov modis modptqkmv4 asp 29
13. integer 250m Surface Reflectance Band Reflectance 16 bit signed 28672 100 16000 0 0001 2 841 876 nm integer 250m Reflectance Band ee 16 bit unsigned Quality see Table 11 BIS integer iii een obs cov Observation Coverage 8 bit siened 0 001 percentage of the grid cell area Percent as S 1 0 100 0 0099999997 covered by the observation 8 76482582 8 1 2 MOD09GA MYD09GA MODIS Terra Aqua Surface Reflectance Daily L2G Global 500 m and 1 km Product description MOD09GA MYD09GA provides MODIS band 1 7 daily surface reflectance at 500 m resolution and 1 km observation and geolocation statistics Figure 4 A MOD09GA RGB image composed of surface reflectance measured by MODIS bands 1 red 4 green and 3 blue on December 6 2000 over the US East coast Product granule ID MOD09GA A2000340 h11v05 005 2006339102700 hdf Table 2 Science Data Sets for MOD09GA MYD09GA Data Science Data Sets S x Scale Fac num observations lkm 8 bit signed State lkm Reflectance S 16 bit unsigned Sensor Zenith Angle l bitsigned 35767 9 18900 hw integer Sensor Azimuth Angle l bitsigned 35767 18000 18000 integer Range pixel to sensor m ee 65535 27000 65535 integer Solar Azimuth Angle EE EP 18000 18000 0 01 integer gflags Geolocation flags em 8 bit unsigned l see Table 15 EES integer SH Ge teger kd OK BYE IS K ke se se see se se ad ole K ete e a ale ae Kk ode k k k K Kd 2 k k se ade k K K
14. ion Solar Zenith Angle aa H integer Coarse Resolution View Zenith Angle ci g integer Coarse Resolution Relative Azimuth 16 bit signed Degree i 0 Angle integer Coarse Resolution Ozone POM unsigned 0 integer Coarse Resolution Brightness Tempera Sal aL 16 bit un 0 ture Band 20 3 360 3 840 um 8 signed integer Coarse Resolution Brightness Tempera degrees K 16 bit un 0 ture Band 21 3 929 3 989 um EE signed integer Coarse Resolution Brightness Tempera desig 16 bit un 0 ture Band 31 10 780 11 280 um 5 signed integer Coarse Resolution Brightness Tempera Jeres K 16 bit un 0 ture Band 32 11 770 12 270 um 8 signed integer Coarse Resolution Granule Time HHMM 16 bit integer 0 Coarse Resolution QA see Table 12 Bit Field 0 signed integer Coarse Resolution Internal CM see ie os 16 bit un Table 17 pared eg Averaged Number of Pixels a ig integer Valid Range 100 16000 100 16000 100 16000 100 16000 100 16000 100 16000 100 16000 0 18000 0 18000 18000 18000 0 255 0 40000 0 40000 0 40000 0 40000 0 2355 0 1073741824 1 8191 15 8 2 Description and Science Data Sets Collection 4 8 2 1 MOD09GQK MYD09GQK MODIS Terra Aqua Surface Reflectance Daily L2G Global 250 m Product description MOD09GQK MYD09GQK provides MODIS band 1 2 daily surface reflectance at 250 m resolution The best observations during a 24 hour period as
15. n RGB color image was produced from the MODIS data acquired on December 4 2000 The product granule ID is MOD09CMG A2000338 005 2006332091104 hdf 8 Data product structure 8 1 Description and Science Data Sets Collection 5 8 1 1 MOD09GQ MYD09GQ MODIS Terra Aqua Surface Reflectance Daily L2G Global 250m Product description MOD09GQ MYD09GQ provides MODIS band 1 2 daily surface reflectance at 250 m resolution This product is meant to be used in conjunction with the MODO9GA where important quality and viewing geometry information is stored Figure 3 An example of MOD09GQ surface reflectance product The corresponding MODIS data were collected on December 3 2000 over the US territory in particular over Alabama Mississippi and Florida Product Granule ID MOD09GQ A2000339 h10v05 005 2006339053418 hdf Upper image Band 2 near infrared surface reflectance shown on a gray scale Lower image false color RGB combination of bands 2 1 and 1 Vegetation appears red water appears blue and clouds appears white A land sea mask has been used to remove deep ocean water which appears black Table 1 Science Data Sets for MOD09GQ MYD09GQ Science Data Sets e Fill HDF Layers 5 Bit Type Valid Range Scale Factor num observations number of None 8 bit signed 1 0 127 NA observations within a pixel integer 250m Surface Reflectance Band Reflectance 16 bit signed 28672 100 16000 0 0001 1 620 670 nm
16. posite of MOD09GQ MYD09GQ Each MOD09Q1 MYD09Q1 pixel contains the best possible L2G observation during an 8 day period as selected on the basis of high observation coverage low view angle the absence of clouds or cloud shadow and aerosol loading Figure 5 An example of MODO9Q 1 surface reflectance product The corresponding MODIS data were collected in December 2000 over the US territory in particular over Alabama Mississippi and Florida Product Granule ID MOD09Q1 A2000337 h10v05 005 2006342044337 hdf Upper image Band 2 near infrared surface reflectance shown on a gray scale Lower image A false color RGB combination of bands 2 1 and 1 Vegetation appears red water appears blue and clouds appears white A land sea mask has been used to remove deep ocean water which appears black Table 3 Science Data Sets for MOD09Q1 MYD09Q1 Science Data Sets HDF Layers 3 Units Bit Type Fill Value Valid Range Scale Factor 250m Surface Reflectance Band 1 620 670 nm Reflectance 16 bit signed integer 28672 100 16000 0 0001 250m Surface Reflectance bo a Band 2 841 876 nm Reflectance 16 bit signed integer 28672 100 16000 0 0001 250m Reflectance Band SE 16 bit unsigned Quality see Table 11 Bit Field integer RS d 12 8 1 4 MOD09A1 MYD09A1 MODIS Terra Aqua Surface Reflectance 8 Day L3 Global 500 m Product description MOD09A1 MYDO9A1 provides MODIS band 1 7 s
17. rth west corner of the image e 0 first 250m line row first 250m sample column e first 250m line second 250m sample e 2 second 250m line first 250m sample e 3 second 250m line second 250m sample 26 8 7 Internal climatology Collection 5 Table 17 Coarse resolution internal CM 15 bit Bit No Description cloudy clear high clouds low clouds Snow fire sun glint cloud shadow pixel is adjacent to cloud 10 11 cirrus 12 pan flag 3 criteria used for aerosol retrieval 14 AOT aerosol optical thinkness has climatological values a c a 5 Unused Bit Comb 1 00 01 10 11 state yes no yes no yes no yes no yes no yes no yes no yes no yes no yes no none small average high salt pan no salt pan criterion 2 criterion 1 yes no 21 8 8 Orbit and coverage Collection 4 Table 18 Orbit and coverage data set 8 bit for Collection 4 the orbit the observation came from and the observation coverage Pee range from 0 to 13 key from 0000 0 to 1011 13 top half mm oS E emmmair eem foo m m ao 87 5 100 0 land water flag Note The orbit number is not the absolute orbit number but a relative orbit number in the file In addi tion a flag is stored which distinguishes between observations which are in the top hal
18. source of data a place an order database a quick start tutorial Link http edcimswww cr usgs gov pub imswelcome b LP DAAC Land Processes Distributed Active Archive Center Useful information and links ftp access to a subset of MODIS land products Link http edcdaac usgs gov main asp c US Geological Survey USGS Global Visualization GloVIS Access to selected MODIS land products with browse capability Link http glovis usgs gov d MODIS Land Global Browse Images 5 km versions of selected product to enable synoptic quality assessment Link http landweb nascom nasa gov cgi bin browse browse cgi e Earth Science Data Interface ESDI at the Global Land Cover Facility 32 day composites images in GeoTiff format limited products Link http landcover org index shtml 5 Data viewing tools a Imager platform Linux A software tool specifically designed by the MODIS LSR SCF for viewing surface reflectance suites Link http modis sr Itdri org MAIN MODIS SOFTWARE IMAGER html b HDFLook platforms SUN AIX SGI Linux MacOSX Cygwin A multifunctional data processing and visualization tool for land ocean and atmosphere MODIS data Link http www loa univ lillel fr Hdflook hdflook gb html c ENVI platforms Windows amp Linux A software for the visualization analysis and presentation of all types of digital imagery Link http www ittvis com envi d HDF Explorer platform Windows
19. tance Daily L2G Global 500 m Product description MODO09GHK MYDO9GHK provides surface reflectance data at 250 m resolu tion for bands 1 2 and at 500 m resolution for bands 3 7 The Em UN best observations during a 24 hour period as determined by overall pixel quality and observational coverage are matched geographically according to corresponding 500 m Pointer Files MODPTHKM see Section 9 Quality information for this product is provided at three different levels of detail for individual pixels for each band and each resolution and for the whole file Figure 9 A MOD09GHK RGB image composed of surface reflectance measured by bands 1 red 4 green and 3 blue on December 17 2000 Sahara Africa Granule ID MODO09GHK A2006351 h18v06 004 2006353163945 hdf Table 7 Science Data Sets for MODO9GHK MYD09GHK zm ras SICUT ME S SE Dru des 500m Surface Reflectance m Band 6 1628 1652 nm Reflectance 16 bit signed integer 28672 100 16000 10000 500m Surface Reflectance m Band 7 2105 2155 nm Reflectance 16 bit signed integer 28672 100 16000 10000 500m Reflectance Band Bit field 32 bit unsigned inte 78741067110 4294967296 NA Quality see Table 12 ger Orbit and coverage Bit field 8 bit unsigned integer 0 255 NA Number of Observations 8 bit signed integer 0 127 NA 500m Surface Reflectance Band 5 1230 1250 nm 16 bit signed integer 28672 100 16000 10000 17 8 2 3 MOD09Q1 MYD
20. tes The product specifically contains information pertaining to cloud and cloud shadow land and water designations aerosols and the data source of corrections performed on the file color cloud value land sea value magenta undefined undefined violet clear shallow ocean yellow cloudy shallow ocean green clear land red cloudy land white clear coastlines shorelines coral cloudy coastlines shorelines plum cloudy shallow inland water MODO9GHK RGB image cyan cloudy ephemeral water blue clear continental moderate ocean sienna cloudy continental moderate ocean Figure 12 The table above interprets the colors used to display the MODO9GST surface reflec tance data state product over MODIS tile h08v06 covering northern Mexico on April 4 2000 i i Corresponding information from MODO09GST Table 10 Science Data Sets for MODO9GST MYDO9GST Science Data Sets e HDF Layers 3 Units Data Type bit Fill Value Valid Range Ikm Reflectance Data State QA es Table 14 Bit field 16 bit unsigned integer 65535 0 65535 Orbit and coverage Bit field 8 bit unsigned integer 0 255 Number of Observations 8 bit signed integer 0 127 20 8 3 Data product quality 8 3 1 250 m resolution QA Table 11 250 m surface reflectance data QA description 16 bit Parameter Name mus Sur refl qc 250m 00 corrected product produced at ideal quality all bands
21. uced for other reasons some 11 or all bands may be fill value 11 Note that a value of 11 overrides a value of 01 0000 highest quality 1000 dead detector data interpolated in L1B 1001 solar zenith gt 86 degrees 1010 solar zenith gt 85 and lt 86 degrees 1011 missing input 2 5 band 1 data quality four bit range a A internal constant used in place of climatological data for at me least one atmospheric constant correction out of bounds pixel constrained to extreme al LIA lowable value 1110 L1B data faulty 1111 not processed due to deep ocean or clouds 6 9 band 2 data quality four bit range EA same as band above 26 29 band 7 data quality four bit range n same as band above l 1 es atmospheric correction performed y no 1 yes ofr 31 adjacency correction performed 22 8 4 Data product state flags 8 4 1 500 m and 1 km resolution data state QA Collection 5 Table 13 500 m and 1 km resolution data state QA description 16 bit C 0 1 cloud state CEN y m nes 1 oe no shallow ocean he mee aerosol quantity kees S m me a i high cloud zudem dd 0 0 0 0 00 0 1 MELLE A fire scc Ee Rr T o e e moot Hee po peo LI Pixel is adjacent to cloud NEL b de LLL 23 e o BRDF correction performed CNN yA nm E 15 internal snow mask 8 4 2 1 km resolution data state QA Collection 4 T
22. urface reflectance at 500 m resolution It is a level 3 composite of 500 m resolution MODO9GA MYD09GA Each product pixel contains the best possible L2G observation during an 8 day period as selected on the basis of high observation coverage low view angle absence of clouds or cloud shadow and aerosol loading Figure 6 A MOD09A1 RGB image composed of surface reflectance data measured by bands 1 red 4 green and 3 blue in December 2000 over the US East coast Granule ID MOD09A1 A2000337 h11v05 005 2006342055602 hdf Table 4 Science Data Sets for MOD09A1 MYDO9A 1 Science Data Sets Units HDF Layers 13 500m Surface Reflectance A Band 1 620 670 nm 16 bit signed integer 500m Surface Reflectance Band 2 841 876 nm 16 bit signed integer 500m Surface Reflectance E Band 3 459 479 nm 16 bit signed integer 500m Surface Reflectance m Band 4 545 565 nm 16 bit signed integer 500m Surface Reflectance SE Band 5 1230 1250 nm 16 bit signed integer Bit Type 500m Surface Reflectance A Band 6 1628 1652 nm Reflectance 16 bit signed integer 500m Surface Reflectance ee Band 7 2105 2155 nm Reflectance 16 bit signed integer 500m Reflectance Band ged Quality see Table 12 Bit Field 32 bit unsigned integer Solar Zenith Angle 16 bit signed integer View Zenith Angle 16 bit signed integer Relative Azimuth Angle 16 bit signed integer 500m State Flags see Ta ble 13 Day of Year Julian
Download Pdf Manuals
Related Search