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1、 Himawari-8/9 Himawari Standard Data Users Guide Version 1.0 31 October, 2013 Japan Meteorological Agency 1-3-4 Otemachi, Chiyoda-ku, Tokyo, 100-8122 Japan Documentation Change Record Issue/revision Date Description Version 1.0 31 October, 2013 Original edition i Contents 1. Introduction . p. 1 2. O
2、bservation Areas p. 2 3. Map Projection Method p. 5 4. File Naming Convention p. 6 5. Himawari Standard Format (Version 1.0) p. 8 6. Back-up Operation by Himawari-7 (MTSAT-2) . p. 18 ii 1. Introduction The Japan Meteorological Agency (JMA) plans to begin the operation of its Himawari-8 satellite in
3、2015 and backup-operation by its Himawari-9 satellite in 2017, with both units scheduled to continue observation until 2030. The information derived from the satellites will be processed to create Himawari Standard Data in Himawari Standard Format as master data for all products related to informati
4、on from Himawari-8 and -9. Himawari Standard Data will be provided for each observation (see Section 2) and each band (see Table 1). Note: In the event of a Himawari-8 failure before Himawari-9 enters stand-by orbit, Himawari Standard Data will be provided using information from Himawari-7 (MTSAT-2)
5、 (see Section 6). Table 1 Himawari-8 and -9 observation bands Band number Central wavelength m (nominal values) 1 0.46 2 0.51 3 0.64 4 0.86 5 1.6 6 2.3 7 3.9 8 6.2 9 7.0 10 7.3 11 8.6 12 9.6 13 10.4 14 11.2 15 12.3 16 13.3 - 1 - 2. Observation Areas Himawari-8 and -9 will each carry an Advanced Hima
6、wari Imager (AHI) scanning five areas: Full Disk (images of the whole Earth as seen from the satellite), the Japan Area (Regions 1 and 2), the Target Area (Region 3) and two Landmark Areas (Regions 4 and 5). While the scan ranges for Full Disk and the Japan Area will be preliminarily fixed, those of
7、 the Target Area and Landmark Areas will be flexible to enable prompt reaction to meteorological conditions. At the beginning of Himawari-8s operation, Landmark Area data will be used only for navigation, and are not intended for use as satellite products. In the future, JMA plans to use Region 5 fo
8、r observation of phenomena such as rapidly developing cumulonimbus clouds and to provide the resulting data to users. In each 10-minute period, the AHI will scan the Full Disk once, the Japan Area and Target Area four times, and the two Landmark Areas twenty times. These 10-minute divisions are basi
9、c units of an observation schedule called a timeline. In Himawari-8 and -9s baseline observation, the timeline will be repeated every 10 minutes except in their housekeeping operation. The observation areas and frequencies are shown in Table 2, and scan images on a timeline are shown in Figure 1. Th
10、e observation areas and numbers of pixels are shown in Table 3 (pixel numbers for regional observations may be changed in orbit testing after launch). - 2 - Table 2 Himawari-8 and -9 observation areas and frequencies Observation area Observations per timeline Time cycle min. Observations per day Ful
11、l Disk Fixed 1 10 144 Japan Area (Region 1 + Region 2) Fixed 4 2.5 576 Target Area (Region 3) Flexible 4 2.5 576 Landmark Area (Region 4) Flexible 20 0.5 2,880 Landmark Area (Region 5) Flexible 20 0.5 2,880 Figure 1 Himawari-8 and -9 scan images on a timeline - 3 - Table 3 Himawari-8 and -9 observat
12、ion areas and numbers of pixels Observation area Band number (see Table 1) Spatial resolution at SSP (sub satellite point) 1 km Numbers of pixels East-west direction North-south direction Full Disk 3 0.5 22,000 22,000 1, 2, 4 1 11,000 11,000 5 16 2 5,500 5,500 Japan Area (Region 1 + Region 2) 3 0.5
13、6,000 4,800 1, 2, 4 1 3,000 2,400 5 16 2 1,500 1,200 Target Area (Region 3) 3 0.5 2,000 2,000 1, 2, 4 1 1,000 1,000 5 16 2 500 500 Landmark Area (Region 4) 3 0.5 2,000 1,000 1, 2, 4 1 1,000 500 5 16 2 500 250 Landmark Area (Region 5) 3 0.5 2,000 1,000 1, 2, 4 1 1,000 500 5 16 2 500 250 (During backu
14、p operation by Himawari-7 (MTSAT-2) Full Disk VIS 1 11,000 11,000 IR 1 4 4 2,750 2,750 (During backup operation by Himawari-7 (MTSAT-2) Half Disk VIS 1 11,000 5,500 IR 1 4 4 2,750 1,375 1 The point of intersection between the surface of the Earth and a straight line connecting the satellite and the
15、Earths center - 4 - 3. Map Projection Method For Himawari Standard Data, Normalized Geostationary Projection is adopted as defined in LRIT/HRIT Global Specification 2 Section 4.4. The projection describes the view from the satellite to an idealized earth. The parameters of the geographic coordinate
16、system used for Himawari Standard Data are based on WGS84 (World Geodetic System 1984) 3 as recommended in ETSAT6/Doc. 16 (1) Implications of Using the World Geodetic System 1984 (WGS84) 4. 2 LRIT/HRIT Global Specification, CGMS, 2013 http:/www.cgms-info.org/publications/technical-publications 3 http:/earth-info.nga.mil/GandG/wgs84/ 4 http:/www.wmo.int/pages/prog/sat/meetings/ET-SAT-6.php - 5 - 4. File Naming Convention In the naming convention for Himawari Stan
