Supported ENVISAT Products

Geolocation Grid ADSRs

  Fields of ENVISAT ASAR_Geo_Grid_ADSR Records

Index Identifier Field Type Field Length Description Units
0 "first_zero_doppler_time" MJD 1 Zero Doppler Time in azimuth of first line of the granule. Gives azimuth location of grid line for first line of the granule. MJD
1 "attach_flag" UChar 1 Attachment Flag (set to 1 if all MDSRs corresponding to this ADSR are blank, set to zero otherwise). flag
2 "line_num" ULong 1 Range line number corresponding to the first line of the granule -
3 "num_lines" ULong 1 Number of output lines in this granule lines
4 "sub_sat_track" Float 1 Subsatellite track heading (relative to North) for first line of granule. This is the heading on the ground (includes Earth rotation). deg.
5 "first_line_tie_points.samp_numbers" ULong 11 Range sample number. Gives the range location of the grid points. First range sample is 1, last is M. Zero filled samples are included. -
6 "first_line_tie_points.slant_range_times" Float 11 2 way slant range time to range sample ns
7 "first_line_tie_points.angles" Float 11 Incidence Angle at range sample deg.
8 "first_line_tie_points.lats" SLong 11 geodetic latitude (positive north) (1e-6) degrees
9 "first_line_tie_points.longs" SLong 11 geodetic longitude (positive east) (1e-6) degrees
10 "spare_1" Spare 1 Spare -
11 "last_zero_doppler_time" MJD 1 Zero doppler time for the last line of the granule MJD
12 "last_line_tie_points.samp_numbers" ULong 11 Range sample number. Gives the range location of the grid points. First range sample is 1, last is M. -
13 "last_line_tie_points.slant_range_times" Float 11 2 way slant range time to range sample ns
14 "last_line_tie_points.angles" Float 11 Incidence Angle at range sample deg.
15 "last_line_tie_points.lats" SLong 11 geodetic latitude (positive north) (1e-6) degrees
16 "last_line_tie_points.longs" SLong 11 geodetic longitude (positive east) (1e-6) degrees
17 "spare_2" Spare 1 Spare -