Ephemerides Service

An Ephemeris is a data set containing high-precision orbital parameters, and other data, for a GPS satellite. Ephemeris information can be obtained from the NetRS by using the Ephemerides Service. This allows the user to obtain GPS Ephemeris data for all satellites without affecting any continuous streams.

The Ephemerides Service is triggered whenever an external client program connects to an Ephemerides Service TCP port. In response, the NetRS will transmit the Ephemeris data, for all satellites, to the client, in RT17 format. Once all the Ephemeris information has been sent, the NetRS will close the connection. The client application should then drop its end of the connection. Note that the Ephemerides data is provided only once each time the port is opened. It is not a continuous stream.

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