�� . �� : http://www.naic.edu/~phil/rfi/gps/gps.html
�� : Mon Dec 2 01:43:24 2013
�� : Fri Feb 28 06:45:10 2014
��:
�� : explosion

gps_satellites

GPS satellites

idl routines for AO satellite prediction.

Info from different sources

Other links:

General info (from wikipedia)

Orbits	6 planes of 4 satellites each.. as of mar 2008 31 satellites in a non uniform arrangement ?? planes inclined 55 degrees to earths equator planes separated by 60 degrees in ra on their ascending nodes. The planes are centered on the earth but fixed with the stars (sidereal) so each ascending node has a fixed ra. satellites at 20200 km altitude
freqs:	L1 (1575.42): nav msg, coarse-acquisition (C/A) and encrypted P(Y), L1C on blk III satellites L2 (1227.60) P(Y) plus L2C on blkIIR-M and newer satellites L3 (1381.05) Nuclear detection L4 (1379.913) being studied for additional ionospheric correction L5 (1176.45 +/- 12.5) blk F launch 2009? S2 (2228.524 BW:.35Mhz null to Null. LHCP . downlink new satellites:
signals	wikipedia gps signals

Processing: x101/070206/chkgps.pro