Almanacs Service

Almanac information can be provided using a query service. The function of a query service is to provide a single source for a specific information type, and to return it without affecting other continuous streams.

The almanacs service provides a complete GPS almanac each time an application connects to the selected port. Upon connection the receiver returns the reduced precision orbit parameters in RT17 format for each SV, typically for planning purposes. Once all the almanac parameters have been received, the application then should close the port. The almanac for each satellite is provided only once each time the port is opened, it is not a continuous stream.

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