ANSI-C programs: par_RISAT_geo.c
NAME
par_RISAT_geo - reads RISAT-1 GeoTIFF data as provided by ISRO
and creates a DEM parameter file, ISP image parameter, and MLI
image file in the format used by GAMMA software.
SYNOPSIS
par_RISAT_geo <annotation_XML> <GEOTIFF>
<polarization> <DEM_par> <MLI_par>
<MLI>
| <annotation_XML> | (input) RISAT-1 product annotation XML file (product.xml) |
| <GeoTIFF> | (input) image data file in GeoTIFF format (example:
scene_RH/imagery_RH.tif) |
|
<polarization> |
polarization RV, RH of the
GeoTIFF image data |
| <DEM_par> | (output) DEM parameter file |
| <MLI_par> |
(output) ISP image
parameter file |
| <MLI> | (output) calibrated image intensity data extracted from
the GeoTIFF scaled using calibration factor
(FLOAT) |
EXAMPLES
par_RISAT_geo product.xml scene_RH/imagergy_RH.tif RH
20120507.dem_par 20120507.mli.par 20120507.mli
Reads the XML annotationproduct.xml file, GeoTiff data file imagergy_RH.tif. Output is the DEM
parameter file 20120507.dem_par, and the MLI image
and MLI image parameter files 20120507.mli and 20120507.mli.par.
DESCRIPTION
The RISAT-1 radar satellite was launched in April 2012 by ISRO
the Indian Space Research Organization http://www.isro.org/satellites/RISAT-1.aspx
and produces data in the GeoTIFF format similar to that produced
by RADARSAT-2. This program generates the MLI parameter
file and DEM parameter file that describe the scene. The program
extracts the MLI image data from the GeoTIFF file and writes it
as float format to a file with dimensions as described in the
DEM_par and MLI parameter file. The MLI data are in big-endian
byte order.
Here is an example DEM parameter file:
Gamma DIFF&GEO DEM/MAP parameter file
title: 1821sd1_s20 RH
DEM_projection: UTM
data_format: REAL*4
DEM_hgt_offset:
0.00000
DEM_scale:
1.00000
width:
7321
nlines:
8214
corner_north: 2446510.516 m
corner_east: 204043.324 m
post_north: -4.5000000 m
post_east:
4.5000000 m
ellipsoid_name: WGS84
ellipsoid_ra:
6378137.000 m
ellipsoid_reciprocal_flattening: 298.2572236
datum_name: WGS 1984
datum_shift_dx:
0.000 m
datum_shift_dy:
0.000 m
datum_shift_dz:
0.000 m
datum_scale_m:
0.00000e+00
datum_rotation_alpha: 0.00000e+00 arc-sec
datum_rotation_beta: 0.00000e+00
arc-sec
datum_rotation_gamma: 0.00000e+00 arc-sec
datum_country_list Global Definition, WGS84, World
projection_name: UTM
projection_zone:
46
false_easting:
500000.000 m
false_northing:
0.000 m
projection_k0:
0.9996000
center_longitude:
93.0000000 decimal degrees
center_latitude:
0.0000000 decimal degrees
And the associated MLI image parameter file:
Gamma Interferometric SAR Processor (ISP) - Image
Parameter File
title: 1821sd1_s20 RH
sensor: RISAT-1 STRIPMAP-96 RH
date: 2012 5 7 23 46
20.85000
start_time:
85580.850000 s
center_time:
0.000000 s
end_time:
0.000000 s
azimuth_line_time: 0.0000000e+00
s
line_header_size:
0
range_samples:
7321
azimuth_lines:
8214
range_looks:
2
azimuth_looks:
4
image_format:
FLOAT
image_geometry:
GEOCODED
range_scale_factor: 1.0000000e+00
azimuth_scale_factor: 1.0000000e+00
center_latitude:
21.9343905 degrees
center_longitude:
90.2943160 degrees
heading:
192.3745575 degrees
range_pixel_spacing:
4.500000 m
azimuth_pixel_spacing:
4.500000 m
near_range_slc:
466177.2722 m
center_range_slc:
0.0000 m
far_range_slc:
0.0000 m
first_slant_range_polynomial:
0.00000 0.00000
0.00000e+00 0.00000e+00 0.00000e+00
0.00000e+00 s m 1 m^-1 m^-2 m^-3
center_slant_range_polynomial:
0.00000 0.00000
0.00000e+00 0.00000e+00 0.00000e+00
0.00000e+00 s m 1 m^-1 m^-2 m^-3
last_slant_range_polynomial:
0.00000 0.00000
0.00000e+00 0.00000e+00 0.00000e+00
0.00000e+00 s m 1 m^-1 m^-2 m^-3
incidence_angle:
39.5356 degrees
azimuth_deskew:
ON
azimuth_angle:
-90.0000 degrees
radar_frequency:
5.3500000e+09 Hz
adc_sampling_rate:
8.3330000e+07 Hz
chirp_bandwidth:
7.5000000e+07 Hz
prf:
2915.111940 Hz
azimuth_proc_bandwidth: 2341.28857 Hz
doppler_polynomial:
0.00000 0.00000e+00 0.00000e+00
0.00000e+00 Hz
Hz/m Hz/m^2
Hz/m^3
doppler_poly_dot:
0.00000e+00 0.00000e+00 0.00000e+00
0.00000e+00 Hz/s Hz/s/m
Hz/s/m^2 Hz/s/m^3
doppler_poly_ddot:
0.00000e+00 0.00000e+00 0.00000e+00
0.00000e+00 Hz/s^2 Hz/s^2/m Hz/s^2/m^2 Hz/s^2/m^3
receiver_gain:
0.0000 dB
calibration_gain:
0.0000 dB
sar_to_earth_center:
0.0000 m
earth_radius_below_sensor:
0.0000 m
earth_semi_major_axis:
6378137.0000 m
earth_semi_minor_axis:
6356752.3141 m
number_of_state_vectors:
0
SEE ALSO
Users Guide, par_RISAT_SLC,
typedef_ISP.h, typedef_DIFF.h