Terra (EOS AM-1) is the flagship of the EOS Earth Observation series and the first satellite to be launched. It was successfully launched on December 18, 1999. Terra carries five sensors, of which ASTER and MODIS are the most useful for land research. ASTER is mainly used to observe the Radiative equilibrium of the earth's surface with high resolution. Compared with the Landsat series satellites, ASTER has improved Spectral resolution and spatial resolution, and significantly increased the short wave infrared and thermal infrared bands. ASTER has a total of 14 bands, including 3 bands in visible and near-infrared, 5 bands in shortwave infrared, and 5 bands in thermal infrared, with resolutions of 15m, 30m, and 90m, and scanning widths of 60km, 30m, and 90m, respectively. The ASTER remote sensing image dataset of the Heihe River Basin was obtained through international cooperation from NASA's data website（ https://wist.echo.nasa.gov/ ）obtain
The data Naming convention is: suppose the name of the ASTER image is "ASTL1B0103190215190103290064", then ASTL1B represents the ASTER L1B product, 003 represents the version number, i.e. VersionID, the next six digits (010319) represent the observation date on March 19, 2001, the next six digits (021519) represent the observation time (02:15:19), and the last six digits (010329) represent the processing date on March 29, 2001, The last four digits (0064) represent the four digit sequence encoding
There are currently 258 ASTER data sets in the Heihe River Basin. The acquisition times are: 2000-04-252000-04-27 (2 scenes), 2000-05-042000-05-15 (4 scenes), 2000-05-20 (9 scenes), 2000-05-29 (3 scenes), 2000-05-31 (2 scenes), 2000-06-122000-06-14 (5 scenes), 2000-06-21 (3 scenes), 2000-06-30 (8 scenes), 2000-07-182000-07-23 (3 scenes), 2000-08-03 (4 scenes), 2000-08-08 (9 scenes), 2000-08-17 (7 scenes), 2000-08-19 (4 scenes), 2000-08-26 (3 scenes), 2000-09-02 (4 scenes), 2000-10-02 (7 scenes), 2000-10-04 (6 scenes), 2000-10-29 (3 scenes), 2000-11-212001-02-18 (2 scenes), 2001-02-2521 (5 scenes), 2001-03-22 (4 scenes), 2001-03-27 (4 scenes), 2001-03-29 (9 scenes), 2001-04-07 (2 scenes), 2001-04-12 (2 scenes), 2001-04-14 (6 scenes), 2001-07-102001-07-12 (8 scenes), 2001-07-19 (2 scenes), 2001-07-21 (8 scenes), 2001 08 13 (8 scenes), 2001 08 20 (7 scenes), 2001 08 22 2001 08 27 (2 scenes), 2001 08 29 2001 09 03 (2 scenes), 2001 11 15 (7 scenes), 2002 02 01 2002 03 30 (2 scenes), 2002 04 17 (2 scenes), 2002 05 24 2002 06 04 (6 scenes), 2002 06 09 2002 06 132002 06 25 2002 08 14 (3 scenes), 2002 09 29 2002 10 19 (2 scenes), 2002 11 11 (2 scenes) 2002-12-29 (4 scenes), 2003-04-182003-05-24 (2 scenes), 2003-07-252003-07-302003-8-10 (5 scenes), 2003-08-122003-08-172003-09-09 (11 scenes), 2003-09-13 (4 scenes), 2003-10-1520003-10-182003-10-29 (9 scenes), 2003-11-302004-03-142005-03-202005-06-052005-08-112007-10-22207-11-142007-11-232007-12-042008-01-282008-02-132008-05-03 (4 scenes), 2008-05-05, 2008-05-17, 2008-06-04 (2 scenes), 2008-06-13
Acquisition of observation instruments
Good data quality
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CSTR:11738.11.ncdc.Westdc.2021.838
10.12072/ncdc.westdc.db3650.2023