cFS Packet Preprocessor¶

A preprocessor for verifying and identifying NASA (National Aeronautics and Space Administration) cFS packets.

cFS packet headers are assumed to consist of a primary CCSDS Space Packet header (6 bytes), seconds (4 bytes), and subseconds (2 bytes).

Class Name¶

org.yamcs.tctm.cfs.CfsPacketPreprocessor

Configuration Options¶

byteOrder (string)

One of BIG_ENDIAN or LITTLE_ENDIAN. This option is used when reading the seconds and subseconds from the packet header. It is not used for reading the CCSDS primary header, which is always in BIG_ENDIAN.

Default: BIG_ENDIAN.

useLocalGenerationTime (boolean)

If true, packets are timestamped with local mission time rather than the time extracted from the packets. Default: false.

timeEncoding (map)

Configure how time is read from the packet. See Time Encoding. The type option is ignored.

If unset, Yamcs defaults to the following configuration:

timeEncoding:
  epoch: GPS

Which is equivalent to:

timeEncoding:
  epoch: CUSTOM
  epochUTC: "1980-01-06T00:00:00Z"
  timeIncludesLeapSeconds: true