I ran Mike McCants's program Highecl because it limits the prediction points within 2.5° of the earth shadow. After two years of observation around the specific dates I know the sky areas almost by heart. However every year I discover some details to ease and improve my (visual) observations. Happy geosat observing. Bram Dorreman Collector PPAS observations ----- Original Message ----- From: "Ed Cannon" <ecannon@mail.utexas.edu> To: <seesat-l@satobs.org> Sent: Wednesday, 2005 February 23 07:50 Subject: Calculating declination of geosat belt? > 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 > > > ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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