[GRASS-user] Preprocessing irsp6 liss4
Ravinder Singh Bhalla
rsbhalla at gmail.com
Wed Jul 29 21:44:32 EDT 2009
Dear Neil/Srini,
I'd like to be able to use a single set of training sites for about 6
adjacent imageries (IRS P-6 LISS-IV).
I've pre-processed the imageries, calculating the apparent radiance at
sensor using the gain and bias values provided in the header (attached
file). I had somehow thought this would fix the problem but results show
that I still need to re-calibrate the imageries by regressing the images
using values for same/similar object pairs (water bodies, field etc.).
Is this the correct procedure?
Header file used for gain/bias(offset) and screenshot of results attached.
Thanks,
Ravi
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Driver: GTiff/GeoTIFF
Files: BAND2.TIF
Size is 6076, 6232
Coordinate System is:
PROJCS["GeoTIFF Version 1.8.1 October 31, 1995, http://www.earthlink.net/~ritter/geotiff/geotiff.htm",
GEOGCS["Indian 1975",
DATUM["Indian_1975",
SPHEROID["Everest 1830 (1937 Adjustment)",6377276.345,300.8016980102425,
AUTHORITY["EPSG","7015"]],
AUTHORITY["EPSG","6240"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4240"]],
PROJECTION["Polyconic"],
PARAMETER["latitude_of_origin",12.159814569919],
PARAMETER["central_meridian",79.5816375647949],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-15215.028340350654616,15587.608734479999839)
Pixel Size = (5.000000000000000,-5.000000000000000)
Metadata:
AREA_OR_POINT=Area
TIFFTAG_IMAGEDESCRIPTION=PRODUCT ID =08003005-01 LOCATION =101/14300 ACQUISITION DATE =20061204
SATELLITE =IRS P6 SENSOR =LISS4 SENSOR MODE =PLD MX LOOK ANGLE = -8.25
LOCATION = ACQUISITION DATE =
SATELLITE = SENSOR = SENSOR MODE = LOOK ANGLE =
LOCATION = ACQUISITION DATE =
SATELLITE = SENSOR = SENSOR MODE = LOOK ANGLE =
LOCATION = ACQUISITION DATE =
SATELLITE = SENSOR = SENSOR MODE = LOOK ANGLE =
PRODUCT TYPE =MAP ORIENTED PRODUCT SIZE =FULL SCENE
TYPE OF PROCESSING =SYSTEMATIC RESAMPLING =CC
VOLUME #/# IN SET =01/01 PIXELS PER LINE = 6076 LINES PER BAND = 6232/ 6232
START LINE # = 1 BLOCKING FACTOR = 1 RECORD LENGTH = 6076 PIXEL SIZE = 5.00
OUTPUT BITS PER PIXEL = 8 ACQUIRED BITS PER PIXEL = 7
BANDS PRESENT =234 PRODUCT CODE =STPC00GTJ
VERSION NO =IRSP6DPSV1R2 ACQUISITION TIME =05:11:24:523
GENERATING COUNTRY =INDIA GENERATING AGENCY =ISRO/NRSA
GENERATING FACILITY =DPS-5 PRODUCT ENDIAN =LITTLE
REV CBIASES AND GAINS IN THE BAND ORDER AS ON THIS TAPE
0.000000000000000 27.165099999999999
0.000000000000000 23.056600000000000
0.000000000000000 36.777299999999997
0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000
SENSOR GAIN STATE = 2 2 1
SENSOR STATE =GOOD
GEOMETRIC DATA MAP PROJECTION =POL ELLIPSOID =EVEREST DATUM =IND-I
USGS PROJECTION PARAMETERS = 6377276.345000000670552 6356075.412999999709427
0.000000000000000 0.000000000000000 79.581637564794903
12.159814569919002 0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000 0.000000000000000
0.000000000000000 0.000000000000000 0.000000000000000
0.000000000000000
UL = 0792630.2977E 121802.5057N -15215.028 15587.609
UR = 0794315.8359E 121802.5065N 15164.972 15587.609
LR = 0794315.3078E 120108.3931N 15164.972 -15572.391
LL = 0792630.8276E 120108.3922N -15215.028 -15572.391
CENTER = 0793453.0673E 120935.5788N -25.028 7.609 3038 3116
OFFSET = 5 ORIENTATION ANGLE = 0.00
SUN ELEVATION ANGLE =67.3 SUN AZIMUTH ANGLE = 96.7 ALTITUDE =821421.00000
HEADING ANGLE = 192.968399
TIFFTAG_SOFTWARE=
TIFFTAG_DATETIME=2008:02:22 16:30:24
TIFFTAG_ARTIST=Sk. Sazid Mahammad,DPSD/SIPG/SIIPA, SAC, ISRO,Ahmedabad-53,India., e-mail: sacsazid at hotmail.com.
TIFFTAG_HOSTCOMPUTER=DPS-5
TIFFTAG_XRESOLUTION=0.0020000001
TIFFTAG_YRESOLUTION=0.0020000001
TIFFTAG_MINSAMPLEVALUE=0
TIFFTAG_MAXSAMPLEVALUE=255
TIFFTAG_RESOLUTIONUNIT=3 (pixels/cm)
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -15215.028, 15587.609) ( 79d26'30.30"E, 12d18'2.51"N)
Lower Left ( -15215.028, -15572.391) ( 79d26'30.83"E, 12d 1'8.39"N)
Upper Right ( 15164.972, 15587.609) ( 79d43'15.84"E, 12d18'2.51"N)
Lower Right ( 15164.972, -15572.391) ( 79d43'15.31"E, 12d 1'8.39"N)
Center ( -25.0283404, 7.6087345) ( 79d34'53.07"E, 12d 9'35.58"N)
Band 1 Block=6076x1 Type=Byte, ColorInterp=Gray
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