[SAC-HELP] flat-earth angles, distances, and src/rec locations

[Carl Tape]

Dear sac-help:

I am wanting to compare synthetic seismograms computed using a
flat-earth model using two different techniques. It seems like it
would be easiest to "turn off" the sphericity/ellipticity of the
Earth, and then input the source and station locations in, say, km.
And then the azimuth and back-azimuth angles would differ by exactly
180 degrees. I do not see a sac header that might do this -- is there
a simple solution? Alternatively, it seems I could set LCALDA = false,
and then manually enter at least some information, but it would be
safer to have sac to the computations based on input source and
station locations.

Thanks,
Carl

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Carl Tape
Assistant Professor
Geophysical Institute
University of Alaska Fairbanks
Phone: 907-474-5456
Email: carltape at gi.alaska.edu
Web: http://www.giseis.alaska.edu/input/carl/
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