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C NMEA-0183 Messages
116 DSM 132/132RS Receiver User Guide
C.14 MSS (Beacon Receiver Signal Status)
The MSS message identifies the status of the beacon signal, including
the beacon signal strength, beacon signal-to-noise ratio (SNR), beacon
frequency, and beacon bit rate.
The MSS message structure is:
$GPMSS,52.5,23.7,287.0,100*4C
Table C.12 describes these fields.
Note – Because the contents of this NMEA message do not change
significantly during a one-second interval, the receiver outputs this
message at a maximum rate of 1 Hz.
Table C.12 MSS message fields
Field Description
1 Signal strength (SS), dB ref: 1 υV/m
2 Signal-to-Noise Ratio (SNR), dB
3 Beacon frequency, 283.5–325.0 kHz
4 Beacon bit rate (25, 50, 100, 200), bits per second
5 Channel number