GPS Satellites Orbits: Resonance

Horseshoe Periodic Orbits for Saturn Coorbital Satellites

We consider the motion of coorbital satellites in the framework of the Restricted Three Body problem for We show a mechanism to generate horsehoe periodic orbits and we compute some families of horseshoe periodic orbits when vary ing the Jacobian constant We conclude that there exist stable horseshoe periodic orbits which t with the motion of Saturn coorbital satellites Janus and Epimetheus

Orbital phasing of satellites on circular orbits

Time Synchronizing Signal by GPS Satellites

-In many industrial and trading activities such as navigation, mapping, power distribution, telecommunication, weather station, digital radio, industrial control systems and research centers,... one of the main exchanged information which has been transferred between different parts is time tag, indicats the precise time of action taking place. Synchronization between these tags is the main por...

GPS/IMU Navigation and Simulation for Higher-Than-GPS Orbits

NAVSYS Corporation has modified its software GPS receiver (SGR) and built an engineering development unit of the High-gain Advanced GPS Receiver (HAGR) optimized for GPS tracking in an orbital environment. Enhancements to the SGR include the ability to track both direct GPS signals, as well as weaker GPS sidelobes. This requires digital beam steering and beam nulling to increase gain towards th...

Determination of GPS Orbits to Submeter Accuracy

Orbits for satellites o f the Global Positioning System (GPS) have been determined with submeter accuracy. Tests used to assess orbit accuracy include orbit comparisons from independent data sets, orbit prediction, ground baseline determination, and formal errors. One satellite tracked for 8 hours each day shows rms errors below I m even when predicted more than 3 days outside of a 1-week data ...