Bill Frost wrote: > Hi Tom, > > Everyone has their favourite. Mine is Orbitron and by coincidence [snip] > Here's the data from a few seconds ago: > > CALIPSO > Lon 28.0621° W > Lat 49.1764° N Just a remark that when it concerns very accurrate geographic positions, the map datum of the given coordinates becomes of concern. I believe the standard SGP routine used by most software provides coordinates in WGS72 datum? GPS-es on the other hand and for example our Dutch topographic maps, employ the WGS84 datum. The difference between WGS72 and WGS84 is not of much concern (it is a difference of about 10 yards maximum) but for some other map datums, it can go up to a few hundred yards. So when a few hundred yards matter, take note of the map datum used and convert if necessary! - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, Cospar 4353 Leiden, the Netherlands. 52.15412 N, 4.49081 E (WGS84), +0 m ASL SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html Station (b)log: http://sattrackcam.blogspot.com Atom RSS: http://sattrackcam.blogspot.com/atom.xml e-mail: sattrackcam@wanadoo.nl ----- ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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