6.0 LEVEL 3 BINNED PRODUCT

Transcription

1 6.0 LEVEL 3 BINNED PRODUCT 6.1 Itroductio Level 3 Bied product data are itegrated from Level 2 GAC data for specified period. Level 3 Bied products are classified ito three products: ocea color, vegetatio ad sea surface temperature. There are products correspodig to the itegratio period of a day, a week, a moth ad a year. Each product is separated header ad each datas. (ote 1) Ocea color product store followig data. Bi data Normalized water-leavig radiace. (412m, 443m, 490m, 520m, 565m), Aerosol radiace at (670m, 765m, 865m), epsilo(670 : 865), ad tau-a (865m). CZCS-like pigmet cocetratio Chlorophyll a cocetratio Diffuse atteuatio coefficiet at 490m Itegral chlorophyll a Vegetatio idices product stores followig data. Bi data. Vegetatio idices Sea surface temperature product stores followig data Bi data. Sea surface temperature (ote 1) If you try to access to multiple files of level 3Bied product by HDF libraries, all files must be stored curret directory. Note that the data types i throughout this documet are expressed with followigs: Ch: character lie Short: 2 byte iteger (siged) Ushort: 2 byte iteger (usiged) Log: 4 byte iteger (siged) Ulog: 4 byte iteger (usiged) Real: 4 byte real umber Double: 8 byte real umber Byte: 1 byte iteger Biary data is Big Edia, IEEE format. Siged data is described i twos complemet.

2 6.2 Namig Covetio Ocea color product :L3BOC$ (Bi data), L3BOC$.x00 (radiace, epsilo, tau-a), L3BOC$.x01(CZCS-like pigmet), L3BOC$.x02 (chlorophyll a cocetratio), L3BOC$.x03 (Diffuse atteuatio coefficiet at 490m), L3BOC$.x04 (Itegral chlorophyll a) Vegetatio product :L3BVI$ (Bi data), L3BVI$.x00 (Vegetatio idices) Sea surface temperature :L3BST$ (Bi data), L3BST$.x00 (Sea surface temperature) product * $ is as follows: 'D' shows a day, 'W' shows a week, 'M' shows a moth, 'Y' shows a year.

3 Mai File Subordiate Files Global Attributes chlor_a_k_490 _sum _sum_sq Level-3 Bied K_490 class: Plaetary Grid _sum _sum_sq chlor_a SEAGrid class: Geometry _sum _sum_sq registratio straddle bis radius max_orth max_south seam_lo CZCS-pigmet 1 records _sum _sum_sq Lw_ tau_865 BiIdex class: Idex _sum _sum_sq --- _sum _sum_sq row_um vsize hsize start_um begi extet max records 2160 records BiList class: Mai vegetatio bi_um obs scees time_rec weights flags_set _sum _sum_sq records records SST _sum _sum_sq records Figure 6 Structure of 3Bied product

4 6.3 Global Attributes V group ame (Tag = VG) (refer 6.2) CDF0.0 V group class Missio ad Documetatio [oc] : Ocea Color, [vi] : Vegetatio Idices, [st] : Sea Surface Temperature V data ame Number of data Product Name 1 Ch 7 / 11 (refer 6.2) The ame of the product file (without path) Title 1 Ch 25 "OCTS Level-3 Bied " Ceter 1 Ch 31 "NASDA/Earth Observatio Ceter" OCTS Processig Ceter (Natioal Space Developmet Agecy of Japa) Missio 1 Ch 11 "ADEOS OCTS" Missio (satellite ame ad sesor ame) Missio Characteristics 1 Ch 189 "Nomial orbit: icliatio = (Su- Sychroous); ode = 10:15-10:45 AM (descedig); eccetricity =< ; altitude = 797km; groud speed = 6.6km/sec; revolutios per day = 14+11/41" Sesor 1 Ch 43 "Ocea Color ad Temperature Scaer (OCTS)"

5 V data ame Number of data Sesor Characteristics 1 Ch 123 "Number of bads = 12; umber of detectors per bad = 10; bits per pixel = 10; sca period = 0.905sec; bit rate = 3Mbit/sec" Product Type 1 Ch 4 "day" 5 "week" 6 "moth" 5 "year" Sub-type 1 Ch 12 "Ocea Color" 19 "Vegetatio Idices" 24 "Sea Surface Temperature" Replacemet Flag 1 Ch 9 "ORIGINAL" If this is the first versio of this product delivered to the NASDA/EOC. Software ID 1 Ch 4 "X Y" Idetities versio of the operatioal software used to create this product. X : OCTS software versio Y : OCTS database versio Processig Time 1 Ch 22 YYYYMMDD hh:mm:ss.ttt Local time of geeratio of this product. Processig Cotrol 1 Ch over 111 (refer attachmet B) All iput ad processig cotrol parameters used by the callig program to geerate the product. Processig Log 1 Ch 160 (refer attachmet C) Processig status iformatio.

6 V data ame Number of data L2 Flag Usage 1 Ch 139 : [oc] "AEROSOL1,LOWLW1,HIGHTAU1,SOLZEN1,TURBIDW1, List of algorithm ames (each COCCOLITH1,CLDICE1,INCPLTSET1,NEGLW1,COASTZ1, separated by oe comma) for SATZEN1,BRIGHT1,SUNGLINT1,NEARCLOUD1,LAND1, the bits (masks ad flags) i EPSILON1" : [oc] the paret Level-2 products. 56 : [vi] "INCPLTSET1,OCEAN1,SCANANG1,OCEANGAIN1, SATURATE1,BRIGHT1" : [vi] 51 : [st] "INCPLTSET1,LAND1,IRCLOUD1,SURFWIND1, EMIANG1,SSTQC1" : [st] L2 Egieerig Quality Usage 24 Byte 24 Flags for showig emergecy telemetry. (For bits i the array that are set (=1), the correspodig bit i the paret Level-2 products' "eg_qual" values are used for exclusio durig biig.

7 6.3.2 Time V data ame Number of data Period Start Year 1 Short 2 Year of start of biig period (cf. "Start Year"); used for iterpretig "time_rec" of Vdata "BiList". Period Start Day 1 Short 2 GMT day-of year of start of biig period (cf. "Start Day") used for iterpretig "time_rec" of Vdata "BiList". Period Ed Year 1 Short 2 Year of ed of biig period (cf. "Ed Year"); used for iterpretig "time_rec" of Vdata "BiList". Period Ed Day 1 Short 2 GMT day-of year of ed of biig period (cf. "Ed Day") used for iterpretig "time_rec" of Vdata "BiList". Start Time 1 Ch 22 YYYYMMDD hh:mm:ss.ttt Start GMT of earliest iput product. Ed Time 1 Ch 22 YYYYMMDD hh:mm:ss.ttt Ed GMT of latest iput product. Start Year 1 Short 2 GMT year of data start for earliest iput product. Start Day 1 Short 2 GMT day-of-year of data start for earliest iput product. Start Millisec 1 Log 4 GMT millisecods-of-day of data start for latest iput product. Ed Year 1 Short 2 GMT year of data start for latest iput product. Ed Day 1 Short 2 GMT day-of-year of data start for latest iput product. Ed Millisec 1 Log 4 GMT millisecods-of-day of data start for latest iput product.

8 6.3.3 Explaatio V data ame Number of data Latitude Uits 1 Ch 14 "degrees North" Uits used for all lat. values i this product. Logitude Uits 1 Ch 13 "degrees East" Uits used for all log. values i this product. Bis 1 Log 4 Number of bis i this product. ( ) Percet Bis 1 Real 4 Percetage of umber of bis i this product by umber of total bis. ( Bis x 100 / )

9 6.4 Level 3 Bied V Group i Mai File The Level 3 Bied product V data listed i each subsectio bellow belog to the V group Level 3 Bied which is of class Plaetary Grid. For OCTS Level 3 Bied products, this V group is spread over multiple HDF files. Ocea color product cosists of a mai file ad 5 subordiate files ad vegetatio product ad sea surface temperature product cosists of a mai file ad oly oe subordiate file. If you try to access to these mai file ad subordiate files by HDF libraries, all files must be stored o curret directory. The mai file cotais the global attributes described above as well as the V data described i this subsectio.

10 V group ame (Tag = VG) Level-3 Bied V group class PlaetaryGrid Vdata SEAGrid of Class Geometry This Vdata cotais iformatio eeded for descriptio of the geographic biig scheme to HDF access software ad may ot be useful to most users. V data ame Field ame Dimesio SEAGrid registratio 1 Log 4 5 Locatio of characteristic poit withi bi. [ Geometry ] straddle 1 Log 4 0 (o) Does a latitudial bad straddle the equator? bis 1 Log Number of equatorial bis. radius 1 Double Earth's radius i kilometers. max_orth 1 Double Northermost latitude i grid. max_south 1 Double Southermost latitude i grid. seam_lo 1 Double Logitude of westermost edge of grid

11 6.4.2 Vdata BiIdex of Class Idex Vdata "BiIdex" of class "Idex" cotais oe record of the followig fields for each of the 2,160 latitudial bi rows i the geographic biig scheme. This Vdata cotais iformatio eeded for descriptio of the geographic biig scheme to HDF access software ad may ot be useful to most users. V data ame BiIdex [ Idex ] Field ame Dimesio row_um 2160 Log Idex of row correspodig to each "BiIdex" record. vsize 2160 Double North-south extet (degrees latitude) of bis for each (1/12 degree) row. hsize 2160 Double East-west extet (degrees logitude) of bis for each row start_um 2160 Log Bi umber of first bi i the grid for each row (cf. "begi"); always the same set of values for the set of rows: 1 for row 0, 4 for row 1,..., for row begi 2160 Log Bi umber of first data cotaiig bi for each row (cf. "start_um"). extet 2160 Log 8640 Number of bis actually stored (i.e., cotaiig data) for each row. max 2160 Log The maximum umber of bis i the grid for each row.

12 6.4.3 Vdata BiList of Class Mai Vdata "BiList" of class "Mai" cotais oe record of the followig fields for each bi i which at least oe pixel was bied. Records for bis i which o pixels were bied ("samps" = 0) are excluded from the product. : umber of bis (value of "extet") V data ame BiList [ Mai ] Field ame Dimesio bi_um Log The idex umber of the bi represeted by this record ad correspodig records i each of the Vdatas of class "Subordiate. obs Short 2 Number of observatios (pixels) bied i this bi. scees Short 2 Number of scees cotributig data (at least oe pixel) to this bi.

13 V data ame BiList [ Mai ] (cotiue) Field ame Dimesio time_rec Short 2 The bit sequece represets the time distributio of the data bied i this bi; the bits represet cosecutive time i the biig period (as defied by the gloval attributes "Period Start Year", "Period Start Day", "Period Ed Year", ad "Period Ed Day"), the lowest bi beig the earliest; for daily products, bits correspod to the relative sequece of orbits bied; for weekly products, each bit represets oe day; for mothly products, each bit represets two days; for yearly products, each bit represets o caledar moth; a bit is set (=1) oly if data for the time correspodig to that bit were bied i this bi. weights Real 4 Sum of the weights of the equivalet bis of the iput products. flags_set Short 2 16 bits i two bytes correspodig to those of the paret Level-2 products' "l2_flags" for Ocea Color, "VI" for Vegetatio Idices, or "SST" for Sea Surface Temperature.

14 6.5 Level 3 Bied V group i Subordiate Files The Level 3 bied product V data listed below belog to the V group Level 3 Bied which is of class Plaetary Grid. For OCTS Level 3 bied products, the V group is spread over multiple HDF files: a mai file ad subordiate files. If you try to access to these mai file ad subordiate files by HDF libraries, all files must be stored o curret directory. Each subordiate file cosists of oe or several V data of class Subordiate ad each V data is amed for the geophysical quality beig bied as follows: (1) Ocea Color Product Lw_412 : ormalized water-leavig radiace (mw cm -2 mm -1 sr -1 ) at 412 m Lw_443 : ormalized water-leavig radiace (mw cm -2 mm -1 sr -1 ) at 443 m Lw_490 : ormalized water-leavig radiace (mw cm -2 mm -1 sr -1 ) at 490 m Lw_520 : ormalized water-leavig radiace (mw cm -2 mm -1 sr -1 ) at 520 m Lw_565 : ormalized water-leavig radiace (mw cm -2 mm -1 sr -1 ) at 565 m La_670 : aerosol radiace (mw cm -2 mm -1 sr -1 ) at 670 m La_765 : aerosol radiace (mw cm -2 mm -1 sr -1 ) at 765 m La_865 : aerosol radiace (mw cm -2 mm -1 sr -1 ) at 865 m epsilo : epsilo of aerosol collectio tau_865 : aerosol optical thickess at 865 m Above 10 parameters are stored i oe subordiate file. CZCS_pigmet : CZCS-like pigmet cocetratio (mg m -3 ) chlor_a : chlorophyll a cocetratio (mg m -3 ) K_490 : diffuse atteuatio coefficiet (m -1 ) at 490 m chlor_a_k_490: itegral chlorophyll (mg m -2 ), calculated usig the Level 2 values chlorophyll a divided by K (490). (2) Vegetatio vegetatio : vegetatio idices (3) Sea surface Temperature SST : sea surface temperature (K) For each file cotaiig a Vdata of the class Subordiate, the ame of the mai file (same as cotet of the global attribute Product Name) is writte i ASCII startig with the first byte of the file byte 0. The data records of these V data start at byte 512 i each file. (TBD) Each V data cotais two fields, the ames of which are made up of the ame of the V data itself cocateated with _sum ad _sum_sq, as, for example, Lw_412_sum ad Lw_412_sum_sq:

15 [Blak]

16 V group ame (Tag = VG) Level-3 Bied V group class PlaetaryGrid Ocea Color (1) Normalized water-leavig radiace (412m,443m,490m,520m,565m), Aerosol radiace (670m,765m,865m), epsilo of aerosol correctio(670:865), aerosol optical thickess : umber of bis (sum of value of "extet") V data ame Lw_412 [ Subordiate ] Lw_443 [ Subordiate ] Field ame Dimesio Lw_412_sum Real 4 sum of atural logs of bied pixel values for correspodig ormalized water-leavig radiace at 412 m. Lw_412_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig Lw 412 m. Lw_443_sum Real 4 sum of atural logs of bied pixel values for correspodig ormalized water-leavig radiace at 443 m. Lw_443_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig Lw 443 m.

17 V data ame Lw_490 [ Subordiate ] Lw_520 [ Subordiate ] Lw_565 [ Subordiate ] La_670 [ Subordiate ] Field ame Dimesio Lw_490_sum Real 4 sum of atural logs of bied pixel values for correspodig ormalized water-leavig radiace at 490 m. Lw_490_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig Lw 490 m. Lw_520_sum Real 4 sum of atural logs of bied pixel values for correspodig ormalized water-leavig radiace at 520 m. Lw_520_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig Lw 520 m. Lw_565_sum Real 4 sum of atural logs of bied pixel values for correspodig ormalized water-leavig radiace at 565 m. Lw_565_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig Lw 565 m. La_670_sum Real 4 sum of atural logs of bied pixel values for correspodig aerosol radiace at 670 m. La_670_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig La 670 m.

18 V data ame La_765 [ Subordiate ] La_865 [ Subordiate ] eps_68 [ Subordiate ] tau_865 [ Subordiate ] Field ame Dimesio La_765_sum Real 4 sum of atural logs of bied pixel values for correspodig aerosol radiace at 765 m. La_765_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig La 765 m. La_865_sum Real 4 sum of atural logs of bied pixel values for correspodig aerosol radiace at 865 m. La_865_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig La 865 m. eps_68_sum Real 4 sum of atural logs of bied pixel values for correspodig epsilo of aerosol correctio at 670 ad 865 m. eps_68_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig epsilo (670:865) tau_865_sum Real 4 sum of atural logs of bied pixel values for correspodig aerosol optical thickess at 865 m. tau_865_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig tau at 865 m.

19 (2) CZCS-like pigmet cocetratio : umber of bis (sum of value of "extet") V data ame CZCS_pigmet [ Subordiate ] Field ame Dimesio CZCS_pigmet_sum Real 4 sum of atural logs of bied pixel values for correspodig CZCS-like pigmet cocetratio. CZCS_pigmet_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig CZCS-like pigmet.

20 (3) Chlorophyll a cocetratio : umber of bis (sum of value of "extet") V data ame chlor_a [ Subordiate ] Field ame Dimesio chlor_a_sum Real 4 sum of atural logs of bied pixel values for correspodig chlorophyll a cocetratio chlor_a_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig chlorophyll a.

21 (4) Diffuse atteuatio coefficiet at 490 m : umber of bis (sum of value of "extet") V data ame K_490 [ Subordiate ] Field ame Dimesio K_490_sum Real 4 sum of atural logs of bied pixel values for correspodig diffuse atteuatio coefficiet at 490 m. K_490_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig diffuse atteuatio coefficiet.

22 (5) Itegral chlorophyll, calculated usig the Level-2 values chlorophyll a divided by K(490) : umber of bis (sum of value of "extet") V data ame chlor_a_k_490 [ Subordiate ] Field ame Dimesio chlor_a_k_490_sum Real 4 sum of atural logs of bied pixel values for correspodig itegral chlorophyll, calculated usig the Level-2 values chlorophyll a divided by K(490). chlor_a_k_490_sum_sq Real 4 sum of squares of atural logs of bied pixel values for correspodig itegral chlorophyll a.

23 6.5.2 Vegetatio idices : umber of bis (sum of value of "extet") V data ame vegetatio [ Subordiate ] Field ame Dimesio vegetatio_sum Real 4 sum of bied pixel values for correspodig vegetatio idices. vegetatio_sum_sq Real 4 sum of squares of bied pixel values for correspodig vegetatio idices.

24 6.5.3 Sea Surface Temperature : umber of bis (sum of value of "extet") V data ame SST [ Subordiate ] Field ame Dimesio SST_sum Real 4 sum of bied pixel values for correspodig sea surface temperature. SST_sum_sq Real 4 sum of squares of bied pixel values for correspodig sea surface temperature.