This function requires a TeraScan Oceansat license.
ocmcal [ parameter=value ... ] [ outputfile ... ]
Parameters are: byte_output, channels.
ocmcal performs radiometric calibration on uncalibrated OCM datasets. The calibration converts counts to radiance. The resulting output datasets contain the calibrated channel data.
Specifies whether the output is to be saved as 8-bit or 16-bit integer data. In the former case, radiance is converted to 8-bit values by multiplying by 2 and rounding to the nearest integer. In the latter case, radiance is converted to 16-bit values by multiplying by 100 and rounding to the nearest integer.
Valid responses are [yes or no]. The default is no.
This is a list of the OCM channels to calibrate from the OCM dataset. The eight correspond to 412, 443, 490, 510, 555, 670, 765 and 865 nm.
Valid responses are [1,2,3,4,5,6,7,8]. The default is 1,2,3,4,5,6,7,8.
Create calibrated output from an OCM TeraScan dataset:
[1] ocmcal in/out files : char(255) ? o1.00298.1850.tdf o1.00298.1850.cal byte_output : char( 3) ? [no] channels : int ( 8) ? [1 2 3 4 5 6 7 8] Processing: o1.00298.1850.tdf: Lines: 10000 Samples: 6020 Line 0 Line 100 Line 200 ...etc
$SATDATA/oceansat-1/ocm, orbdata, devtable, $SATDATA/oceansat-1/ocm_calib.dat
ocmin, ocm_color, ocm_chlor, OCM overview
Calibration is performed according to ISRO specifications as outlined in the document: Radiometric Normalization for IRS-P4:OCM Author: A. Senthil Kumar, OCM-Data Products Team Signal and Image Processing Group, Space Applications Center Ahmedabad 380053. e.mail: skumar@ipdpg.gov.in
Last Update: $Date: 2002/05/02 23:28:48 $