NavCom SF-3050 Rev.B - Manual (Page 116)

SF-3050 User Guide – Rev B

These settings indicate:
• On Change: The receiver outputs the
specified message at the highest rate the
system can output. The rate must be
purchased. For example, if the receiver
has a purchased rate of 25 Hz, the
messages set at On Change are output at
25 Hz. (This rate only applies to MEAS1B
and PVT1B.) Some messages, like
satellite almanac, are output after an
update is received over the air.
• On Time: The receiver outputs the
specified message at a rate
≤ the
purchased rate. For example, if the
receiver has a purchased rate of 25 Hz, a
message may be set at a lower output rate,
such as On Time, 10 Hz, or 0.1 seconds.
Message Descriptions
The following message descriptions are fully defined
in the Sapphire Technical Reference Manual (see
Related Documents).

ALM1B Packed Almanac:
Data corresponding to each satellite in the GPS
constellation, including: GPS Week number of
collected almanac, GPS Time of week [in
seconds] of collected almanac, almanac reference
week, almanac reference time, almanac source,
almanac health, pages 1-25, and sub-frames 4
and 5. Packed almanac data for 32 GPS or 24
GLONASS satellites.

CHNLSTATUS1B Channel Status:
Receiver channel status information containing:
Sapphire engine status, number of satellites
viewed/tracked, PDOP, tracked satellite identity,
5-114