MCMAP

1. NAME
2. SYNOPSIS
3. DESCRIPTION
4. EXAMPLES
5. SEE ALSO

NAME

mcmap - maps GOES satellite image onto a latitude longitude grid

SYNOPSIS

mcmap lonlow dlon lonhigh latlow dlat lathigh newname

DESCRIPTION

Mcmap accepts a GOES satellite image in Candis format on the standard input and maps the image to a latitude-longitude grid. The modified file is written to the standard output. The image field between the values of latlow and lathigh and lonlow and lonhigh (all float) is sampled at intervals of dlat and dlon (also float) respectively. The pixels are converted to either brightness (0 to 1) for visible images, and temperature (K) for infrared and water vapor images. The converted pixels are then placed in the float field named by newname. If dlat or dlon are set so that more than 640 positions in lon or 350 positions in lat would be produced, dlat or dlon is increased so a maximum of 640 or 350 points will be sampled. This is done because the resolution of the PC-McIDAS file is only 640x350, so no resolution greater than that is possible. The values of dlat and dlon are considered as absolute values, so dlat of -1 has the same result as dlat of 1. If a point is out of sight of the satellite, the float value is set to BAD.

EXAMPLES

This example would create a field "fim" that contained values for the latitudes between 25 and 45 degrees and the longitudes between -120 and -90 degrees sampled at 1 degree increments.

SEE ALSO

mcselect(1) - extracts GOES images from data stream and stores them as Candis files
mcdisp(1) - displays GOES images