Mpc: Gnss Measurements - Magellan ProFlex 500 Reference Manual

Data Output

MPC: GNSS Measurements

280
Type Name Size
Unsigned Check-
2
short sum
Total 76
This message contains the measurement of one satellite for
one epoch.
The message is as follows:
$PASHR,MPC,<structure>
The message's binary structure is described in the table
below.
Type Size
Unsigned short 2 Sequence tag (unit: 50 ms) modulo 30 minutes
Number of remaining structure to be sent for current
Unsigned char 1
epoch
Satellite index number
GPS: 1-32
Unsigned char 1
SBAS: 33-51
GLONASS: 65-88
Unsigned char 1 Satellite elevation angle (degree)
Unsigned char 1 Satellite azimuth angle (2-degree increments)
Channel ID
GPS: 1-4, 15-18, 29-32
Unsigned char 1
SBAS: 5, 6
GLONASS: 49-54, 63-68
29 C/A code data block (29 bytes)
Contents
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.
Contents