Spectra Precision ProMark 800 Reference Manual - Manual (Page 411)

399
Output Message Library
Reminder on How
to Output SAW
Messages
Use the $PASHS,RAW command with the syntax below:
$PASHS,RAW,SAW,,ON,
For more details on the $PASHS,RAW command, refer to the
Set Command Library Chapter.
As an example, the command below will output SAW
messages on port A at a rate of 15 seconds:
$PASHS,RAW,SAW,A,ON,15
SNG: GLONASS Ephemeris Data
This message contains the GLONASS ephemeris data for one
satellite.
The message is as follows:
char Health 1
Satellite Health&Status bitwise meaning is:
Bit0 – Ranging On(0), Off(1)
Bit1 – Corrections On(0), Off(1)
Bit2 – Broadcast Integrity On(0), Off(1)
Bit3 – Reserved
Bit4-7 – SBAS provider ID (0-15):
0 – WAAS,
1 – EGNOS,
2 – MSAS,
3-13 – Not assigned yet,
14-15 – Reserved
long T0 4
Almanac data reference time within the day
expressed in the SBAS time scale (seconds)
float 3*4 Satellite ECEF X,Y,Z coordinates (meters)
float 3*4
Satellite ECEF velocity X’, Y’, Z’ coordinates
(m/s)
long Tow 4
Time within week in GPS time scale when
SBAS almanac was received
char Wn 1
Week number in GPS time scale modulo 256
when SBAS almanac was received
char Prn 1 Satellite number (33 to 51)
Unsigned short
Check-
sum
2
The checksum is computed by breaking the
structure into 18 unsigned shorts, adding them
together, and taking the least significant 16
bits of the result.
Total 38
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