ashtech G12 - MSV: Minimum Satellites for Raw Measurement Output

131
Commands
j = 1,2...N; N = the order number of the PRN record in the message.
MSV: Minimum Satellites for Raw Measurement Output
$PASHS,MSV,d1
This command allows you to set the minimum number of satellites the receiver is
required to track in order for it to output raw measurement data (MBN, MCA, etc.),
where d1 is a number between 1 and 9. The receiver stops outputting measurement
data if the number of satellites it is tracking falls below this minimum. You can view
the current setting for minimum satellites by entering the $PASHQ,RAW command
and checking the MSV field.
Examples
Set minimum number of satellites to 4:
$PASHS,MSV,4
Set minimum number of satellites to 1:
24*j-7 POL unsigned
char
1 This number is either 0 or 5, 0
meaning satellite is just locked, and
5 meaning the beginning of the first
frame has been found.
MCA record,
polarity_known
24*j-6 CN0 unsigned
char
1 Signal-to-noise of satellite
observation
MCA record, ireg
24*j-5 PHASE double 8 Full carrier phase measurements in
cycles. Not available unless carrier
phase option is installed.
MCA record,
full_phase
24*j+3 RANGE unsigned
long
4 Pseudo-range in seconds,
sf=3.0e10
G-8 ITA record,
raw_range
24*j+7 DPL long 4
Doppler (10
-4
Hz)
MCA record, doppler
24*j+11 LCK_TIME unsigned
long
4 Continuous counts since satellite is
locked. This number increments
about 500 timesper second
MBN record,
lost_lock_ctr
24*N+15 checksum unsigned
char
1MCA record
Table 4.63. MACM Data String (Continued)
Byte # Name Type Size Content Origin
G12RevD.book Page 131 Tuesday, April 2, 2002 4:33 PM