Someone asked me how to determine the declination of the geosat (Clarke) belt from his location. I know there's a formula, but I don't know what it is and can't locate it online right now. (There's something close on Celestrak.org, because it shows how to calculate altitude/elevation and azimuth -- http://celestrak.com/columns/v04n09/ --.) What I do is just run predictions for a location and look for the declinations of the active geosats -- the ones that stay on the same declination all night. Here are some geostationary azimuth and elevation javascript calculators: http://www.csgnetwork.com/geosatposcalc.html http://www.sfwx.com/softworks/geoBearing.html http://web.bsu.edu/tti/3_2/3_2e.htm The third one shows formulas and code. But I don't find any that calculate RA and Dec. (Of course to calculate RA it would want a specific time, but all we need is the declination.) Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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