Spectra Precision ProMark 800 Reference Manual - Manual (Page 414)

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Output Message Library
Reminder on How
to Output SNV
Messages
Use the $PASHS,RAW command with the syntax below:
$PASHS,RAW,SNV,<port_ID>,ON,<Rate>
For more details on the $PASHS,RAW command, refer to the
Set Command Library Chapter.
As an example, the command below will output SNV
messages on port A at a rate of 15 seconds:
$PASHS,RAW,SNV,A,ON,15
SNW: SBAS Ephemeris Data
This message contains the SBAS ephemeris data for one
satellite.
The message is as follows:
$PASHR,SNW,<structure>
The message’s binary structure is described in the table
below.
Double i0 8 Inclination angle (semicircles)
Float omega dot 4 Rate of right ascension (semicircles/sec)
Float I dot 4 Rate of inclination (semicircles/sec)
Short Accuracy 2 User range accuracy
Short Health 2 Satellite health
Short fit 2 Curve fit interval
Char prn 1 Satellite PRN number minus 1 (0-31)
Char 1 Reserved byte
Unsigned
short
Checksum 2
The checksum is computed by breaking the struc-
ture into 37 unsigned shorts, adding them
together, and taking the least significant 16 bits of
the result.
Total 76
Type Name Size Contents
Type Name Size Contents
char - 1 Spare field
char accuracy 1 Accuracy
long T0 4
Ephemeris data reference time within the
day expressed in the SBAS time scale (sec-
onds)
double 3*8 Satellite ECEF X,Y,Z coordinates (meters)