NavCom SF-3050 Rev.I - Manual (Page 122)

SF-3050 GNSS Product User Guide – Rev I
103

These settings indicate the following:

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 applies only 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 in the fore-matter).
 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, satellite elevation and
azimuth, C/No for the track signals, and correction age for each satellite.
 EPHEM1B Packed Ephemeris:
Individual satellite tracking information including: GPS Week number of collected
ephemeris, GPS Time of week [in seconds] of collected ephemeris, IODC, and sub-
frame 1, 2, and 3 data. Packed ephemeris data for 32 GPS or 24 GLONASS satellites.
 MEAS1B Raw Measurement Data:
Raw Measurement Data Block containing: Raw measurements from satellites so
measurements can be post-processed to achieve precise point positions, the GPS
Week, GPS Time of Week, Time Slew Indicator, Status, Channel Status, CA
Pseudorange, L1 Phase, P1-CA Pseudorange, P2-CA Pseudorange, L2 Phase, GPS
L5, GLONASS G1 and G1 Code and Phase, and SBAS Code and Phase. This data
stream is repeated for each individual tracked satellite.
 MSGPRODUCTINFO Product Information:
Product type, digital serial number, and system revision number (incremented at every
hardware change).
 MSGVERSION Firmware Version:
Version number, date and time stamp for the requested firmware component.
 PVT1B (Position, Velocity, and Time):
Provides: GPS Week number, GNSS satellites used, latitude, longitude, navigation