Query Services

Query services provide a one-time retrieval of information which is initiated simply by connecting to the port for which that service is configured. An explicit query is not required to retrieve this information, only connection to the port. Information provided by one of the query services typically changes only on an infrequent basis, such as ephemeris, almanac, or tracking information.

The availability of the query services makes it possible for multiple applications to share a continuous stream, and retrieve additional, related information without changing the nature of the continuous stream for all users.

Query services include:

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