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ObservationsBuffer

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Emanuele Ziglioli edited this page Jan 31, 2016 · 2 revisions

Description

In live processing observations may arrive from a mobile device, from a serial connection, from RTCM source or other asynchronous sources. Before goGPS can use them they have to be synchronized by GPS epoch and must be kept locally. ObservationsBuffer act as a buffer of received observations.

ObservationsBuffer can also act ad NavigationProducer in case the source provide this information (ie. a serial connection from uBlox)

Logging

ObservationsBuffer may also log received messages in a file for post processing purposes. Logfiles can be read by same ObservationsBuffer class.

Streaming

ObservationsBuffer implements StreamEventListener interface to enable diffent observation sources ( StreamEventProducer ) to feed the buffer.

The StreamEventProducer interface is implemented by:

  • RTCM3Client - connects to a RTCM source to gather master data on Fixed Station or Virtual Reference Station (VRS)
  • UBXReader - Reads from InputStream UBX RAW,AID messages
  • UBXSerialConnection - Connects a uBlo xwith serial interface, requires RxTx lib
  • UBXSerailReader - used in UBXSerialConnection

Note: a StreamEventProducer can feed more StreamEventListener, this enable to perform several processing at the same time using same live data

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