Information on available data in the FASTEX Central Archive GOES EAST Half-hourly Imagery for the five channels in Polar stereographic projection, grib format between 19970101:00Z and 19970301:00Z. Data received and computed at Meteo-France/CMS. The GOES map area shows the domain used for GOES imagery. METEOSAT Half-hourly Imagery for the three channels in Polar stereographic projection, grib format between 19970101:00Z and 19970301:00Z. Data received at Meteo-France/CMS or sent by EUMETSAT to Meteo-France/CMS. Data computed at Meteo-France/CMS. The METEOSAT map area shows the domain used for METEOSAT imagery. NOAA 12 and 14 Orbit by orbit Imagery for the AVHRR five channels in Polar stereographic projection, grib format, for NOAA-12 and NOAA-14. Eastern part of the FASTEX domain (data acquired and computed at Meteo-France/CMS (Lannion/France)) : between 970101 and 970228 Western part of the FASTEX domain (data acquired at AES (Halifax/Canada) and computed at Meteo-France/CMS) : between 970102 and 970228 The NOAA map area shows the domain used for NOAA imagery. further information in the summary of the daily data available for each satellite. Data Processing Calibration/correction: Infrared and WaterVapor channels data are calibrated. Visible channel data are corrected when the zenital solar angle is below 60 degrees for GOES-EAST and METEOSAT, and 86 degrees for NOAA. Geographic projection: All images are in Polar Stereographic projection - Central Meridian 50W - latitude of true scale: 45N Domain: Upper Left Upper Right Lower Right Lower Leftt satellite Corner(deg) Corner(deg) Corner(deg) Corner(deg) lat lon lat lon lat lon lat lon ---------- ------ -------- ------ -------- ------ -------- ------ ------- GOES-EAST 33.330 -140.000 69.249 40.000 24.212 -33.496 11.068 -91.035 METEOSAT 79.598 -140.000 40.730 40.000 14.624 -13.471 25.840 -58.430 NOAA(East) 90.000 0.000 40.728 40.000 18.645 -10.194 32.311 -50.000 NOAA(West) 44.174 -127.471 78.316 -23.435 24.378 -45.914 15.147 -82.735 Image Size and resolution: Size (km) Resolution Size(pixels) satellite channels X(km) Y(km) x(km) y(km) columns rows -------- -------- ----- ----- ----- ----- ------- ---- GOES-EAST 1,2,4,5 7875 6750 7.5 7.5 1050 900 GOES-EAST 3 7875 6750 15. 15. 525 450 METEOSAT VIS 6000 6750 5. 5. 1200 1350 METEOSAT IR, WV 6000 6750 7.5 7.5 800 900 NOAA all 5000 6000 2. 2. 2500 3000 (resolution given at 45N) Range: All data values are between 0 and 255, coded on 8 bits. To retrieve brightness temperature (or Albedo) from the data values, the following fonction should applied: Infrared channels (GOES channels 2,4,5, METEOSAT IR channel, NOAA channels 3,4,5) Tb (Kelvin) = value + 100 Water Vapor channels (GOES channel 3, METEOSAT WV channel) Tb (Kelvin) = value / 3 + 180 Visible channels (GOES channel 1, NOAA channels 1,2) No calibration for METEOSAT VIS channel NOAA channels 1,2: Albedo (%) = 100 * value / 255 GOES channel 1: Albedo (%) = 100 * value / 255 -6.2 Data format File name : Each file name *.grb.gz is made by appending the satellite and domain identifier , the channel, the reception date and time in the YYYYMMDDHHMISS format. The satellite identifiers are G8, MET, ndh, ndl, njh, njl respectively for GOES-EAST, METEOSAT, NOAA-12 Halifax domain, NOAA-12 Lannion domain, NOAA-14 Halifax domain and NOAA-14 Lannion domain. FOR NOAA-12 and NOAA-14, the time is the first time of reception for this orbit (north limit for southbound orbits and south limit for northbound orbits). Files are compressed with gzip. Format description : WMO GRIB files Section 0 (indicator section) : 8 bytes Section 1 (product definition): 40 bytes Section 2 (grid description) : 32 bytes No section 3 Section 4 (binary data) : 11 bytes description + columns*rows bytes + 0 or 1 byte Section 5 (end section) : 4 bytes Main information included in section 1: Satellite identifier (byte no.10 in the section, no.18 since file beginning) 131: GOES-EAST, 121: METEOSAT, 143: NOAA-12, 145: NOAA-14 Spectral band (bytes no.11 and 12 in the section, no.19 and 20 since file beginning) GOES-EAST: channel 1: 129-0 ;channel 2: 128-2 ; channel 3: 135-0 channel 4: 128-0 ;channel 5: 128-5 METEOSAT : VIS channel: 129-0 ;IR channel: 128-0 ;WV channel: 135-0 NOAA : channel 1: 131-0 ;channel 2: 132-0 ; channel 3: 128-3 channel 4: 128-0 ;channel 5: 128-5 Year,Month,Day,Hour,Minute of data (bytes no.13 to 17 in the section, no.21 to 25 since file beginning) Main information included in section 2: Number of points along X axis (bytes no.7 and 8 in the section, no.55 and 56 since file beginning) coded in 2 bytes Number of points along Y axis (bytes no.9 and 10 in the section, no.57 and 58 since file beginning) coded in 2 bytes Latitude of first grid point (bytes no.11 to 13 in the section, no.59 to 61 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate south latitude Longitude of first grid point (bytes no.14 to 16 in the section, no.62 to 64 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate west longitude X direction increment (bytes no.21 to 23 in the section, no.69 to 71 since file beginning) in meters,coded in 3 bytes Y direction increment (bytes no.24 to 26 in the section, no.72 to 74 since file beginning) in meters, coded in 3 bytes Updated: 18 Mar 1998 Top of page
Data Processing Calibration/correction: Infrared and WaterVapor channels data are calibrated. Visible channel data are corrected when the zenital solar angle is below 60 degrees for GOES-EAST and METEOSAT, and 86 degrees for NOAA. Geographic projection: All images are in Polar Stereographic projection - Central Meridian 50W - latitude of true scale: 45N Domain: Upper Left Upper Right Lower Right Lower Leftt satellite Corner(deg) Corner(deg) Corner(deg) Corner(deg) lat lon lat lon lat lon lat lon ---------- ------ -------- ------ -------- ------ -------- ------ ------- GOES-EAST 33.330 -140.000 69.249 40.000 24.212 -33.496 11.068 -91.035 METEOSAT 79.598 -140.000 40.730 40.000 14.624 -13.471 25.840 -58.430 NOAA(East) 90.000 0.000 40.728 40.000 18.645 -10.194 32.311 -50.000 NOAA(West) 44.174 -127.471 78.316 -23.435 24.378 -45.914 15.147 -82.735 Image Size and resolution: Size (km) Resolution Size(pixels) satellite channels X(km) Y(km) x(km) y(km) columns rows -------- -------- ----- ----- ----- ----- ------- ---- GOES-EAST 1,2,4,5 7875 6750 7.5 7.5 1050 900 GOES-EAST 3 7875 6750 15. 15. 525 450 METEOSAT VIS 6000 6750 5. 5. 1200 1350 METEOSAT IR, WV 6000 6750 7.5 7.5 800 900 NOAA all 5000 6000 2. 2. 2500 3000 (resolution given at 45N) Range: All data values are between 0 and 255, coded on 8 bits. To retrieve brightness temperature (or Albedo) from the data values, the following fonction should applied: Infrared channels (GOES channels 2,4,5, METEOSAT IR channel, NOAA channels 3,4,5) Tb (Kelvin) = value + 100 Water Vapor channels (GOES channel 3, METEOSAT WV channel) Tb (Kelvin) = value / 3 + 180 Visible channels (GOES channel 1, NOAA channels 1,2) No calibration for METEOSAT VIS channel NOAA channels 1,2: Albedo (%) = 100 * value / 255 GOES channel 1: Albedo (%) = 100 * value / 255 -6.2 Data format File name : Each file name *.grb.gz is made by appending the satellite and domain identifier , the channel, the reception date and time in the YYYYMMDDHHMISS format. The satellite identifiers are G8, MET, ndh, ndl, njh, njl respectively for GOES-EAST, METEOSAT, NOAA-12 Halifax domain, NOAA-12 Lannion domain, NOAA-14 Halifax domain and NOAA-14 Lannion domain. FOR NOAA-12 and NOAA-14, the time is the first time of reception for this orbit (north limit for southbound orbits and south limit for northbound orbits). Files are compressed with gzip. Format description : WMO GRIB files Section 0 (indicator section) : 8 bytes Section 1 (product definition): 40 bytes Section 2 (grid description) : 32 bytes No section 3 Section 4 (binary data) : 11 bytes description + columns*rows bytes + 0 or 1 byte Section 5 (end section) : 4 bytes Main information included in section 1: Satellite identifier (byte no.10 in the section, no.18 since file beginning) 131: GOES-EAST, 121: METEOSAT, 143: NOAA-12, 145: NOAA-14 Spectral band (bytes no.11 and 12 in the section, no.19 and 20 since file beginning) GOES-EAST: channel 1: 129-0 ;channel 2: 128-2 ; channel 3: 135-0 channel 4: 128-0 ;channel 5: 128-5 METEOSAT : VIS channel: 129-0 ;IR channel: 128-0 ;WV channel: 135-0 NOAA : channel 1: 131-0 ;channel 2: 132-0 ; channel 3: 128-3 channel 4: 128-0 ;channel 5: 128-5 Year,Month,Day,Hour,Minute of data (bytes no.13 to 17 in the section, no.21 to 25 since file beginning) Main information included in section 2: Number of points along X axis (bytes no.7 and 8 in the section, no.55 and 56 since file beginning) coded in 2 bytes Number of points along Y axis (bytes no.9 and 10 in the section, no.57 and 58 since file beginning) coded in 2 bytes Latitude of first grid point (bytes no.11 to 13 in the section, no.59 to 61 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate south latitude Longitude of first grid point (bytes no.14 to 16 in the section, no.62 to 64 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate west longitude X direction increment (bytes no.21 to 23 in the section, no.69 to 71 since file beginning) in meters,coded in 3 bytes Y direction increment (bytes no.24 to 26 in the section, no.72 to 74 since file beginning) in meters, coded in 3 bytes Updated: 18 Mar 1998 Top of page
Upper Left Upper Right Lower Right Lower Leftt satellite Corner(deg) Corner(deg) Corner(deg) Corner(deg) lat lon lat lon lat lon lat lon ---------- ------ -------- ------ -------- ------ -------- ------ ------- GOES-EAST 33.330 -140.000 69.249 40.000 24.212 -33.496 11.068 -91.035 METEOSAT 79.598 -140.000 40.730 40.000 14.624 -13.471 25.840 -58.430 NOAA(East) 90.000 0.000 40.728 40.000 18.645 -10.194 32.311 -50.000 NOAA(West) 44.174 -127.471 78.316 -23.435 24.378 -45.914 15.147 -82.735
Size (km) Resolution Size(pixels) satellite channels X(km) Y(km) x(km) y(km) columns rows -------- -------- ----- ----- ----- ----- ------- ---- GOES-EAST 1,2,4,5 7875 6750 7.5 7.5 1050 900 GOES-EAST 3 7875 6750 15. 15. 525 450 METEOSAT VIS 6000 6750 5. 5. 1200 1350 METEOSAT IR, WV 6000 6750 7.5 7.5 800 900 NOAA all 5000 6000 2. 2. 2500 3000 (resolution given at 45N)
Tb (Kelvin) = value + 100
Tb (Kelvin) = value / 3 + 180
NOAA channels 1,2: Albedo (%) = 100 * value / 255 GOES channel 1: Albedo (%) = 100 * value / 255 -6.2
Data format File name : Each file name *.grb.gz is made by appending the satellite and domain identifier , the channel, the reception date and time in the YYYYMMDDHHMISS format. The satellite identifiers are G8, MET, ndh, ndl, njh, njl respectively for GOES-EAST, METEOSAT, NOAA-12 Halifax domain, NOAA-12 Lannion domain, NOAA-14 Halifax domain and NOAA-14 Lannion domain. FOR NOAA-12 and NOAA-14, the time is the first time of reception for this orbit (north limit for southbound orbits and south limit for northbound orbits). Files are compressed with gzip. Format description : WMO GRIB files Section 0 (indicator section) : 8 bytes Section 1 (product definition): 40 bytes Section 2 (grid description) : 32 bytes No section 3 Section 4 (binary data) : 11 bytes description + columns*rows bytes + 0 or 1 byte Section 5 (end section) : 4 bytes Main information included in section 1: Satellite identifier (byte no.10 in the section, no.18 since file beginning) 131: GOES-EAST, 121: METEOSAT, 143: NOAA-12, 145: NOAA-14 Spectral band (bytes no.11 and 12 in the section, no.19 and 20 since file beginning) GOES-EAST: channel 1: 129-0 ;channel 2: 128-2 ; channel 3: 135-0 channel 4: 128-0 ;channel 5: 128-5 METEOSAT : VIS channel: 129-0 ;IR channel: 128-0 ;WV channel: 135-0 NOAA : channel 1: 131-0 ;channel 2: 132-0 ; channel 3: 128-3 channel 4: 128-0 ;channel 5: 128-5 Year,Month,Day,Hour,Minute of data (bytes no.13 to 17 in the section, no.21 to 25 since file beginning) Main information included in section 2: Number of points along X axis (bytes no.7 and 8 in the section, no.55 and 56 since file beginning) coded in 2 bytes Number of points along Y axis (bytes no.9 and 10 in the section, no.57 and 58 since file beginning) coded in 2 bytes Latitude of first grid point (bytes no.11 to 13 in the section, no.59 to 61 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate south latitude Longitude of first grid point (bytes no.14 to 16 in the section, no.62 to 64 since file beginning) in degrees*1000, coded in 3 bytes bit 1 equal 1 indicate west longitude X direction increment (bytes no.21 to 23 in the section, no.69 to 71 since file beginning) in meters,coded in 3 bytes Y direction increment (bytes no.24 to 26 in the section, no.72 to 74 since file beginning) in meters, coded in 3 bytes Updated: 18 Mar 1998 Top of page
Section 0 (indicator section) : 8 bytes Section 1 (product definition): 40 bytes Section 2 (grid description) : 32 bytes No section 3 Section 4 (binary data) : 11 bytes description + columns*rows bytes + 0 or 1 byte Section 5 (end section) : 4 bytes
GOES-EAST: channel 1: 129-0 ;channel 2: 128-2 ; channel 3: 135-0 channel 4: 128-0 ;channel 5: 128-5 METEOSAT : VIS channel: 129-0 ;IR channel: 128-0 ;WV channel: 135-0 NOAA : channel 1: 131-0 ;channel 2: 132-0 ; channel 3: 128-3 channel 4: 128-0 ;channel 5: 128-5
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