Hdt : Cap Vrai; Hpr : Cap Vrai - Spectra Precision GNSS SP90m Guide Utilisateur

HDT : Cap vrai

$GPHDT,f1,T*cc
Parameter
Last computed heading value, in degrees
f1,T
"T" for "True".
*cc Checksum

HPR : Cap vrai

This message delivers either pitch OR roll angles, not both at
the same time, depending on how the antennas are installed.
$PASHR,HPR,m1,f2,f3,f4,f5,f6,d7,d8,d9,f10*cc
Parameter
m1 UTC time of attitude data (hhmmss.ss).
f2 True heading angle in degrees.
f3 Pitch angle in degrees.
f4 Roll angle in degrees.
f5 Carrier measurement RMS error, in meters.
Baseline RMS error, in meters.
f6
(=0 if baseline is not constrained)
Integer ambiguity:
d7 • 0: Fixed
• >0: Float
Attitude/heading mode status:
• 0: Operation with fixed baseline length
d8
• 1: Calibration in progress
• 2: Flex (flexible) baseline mode ON
Character string of the type "y.xxx" defined
as follows:
• "y" refers to the antenna setup:
y=0: no length constraint is applied
y=1: heading mode (one vector)
y=2: attitude mode (2 vectors)
y=3: attitude mode with 3 or more vectors
• Each "x" (0 to 9) represents the number of
d9
Double Differences (DD) used in the corre-
sponding baseline.
If this number is greater than 9, then "9" is
reported.
If there are only 2 vectors, the last x is "0"
Double differences refer to the very last inte-
ger second time-tagged epoch.
PDOP corresponding to vector V12, as com-
f10 puted for the very last integer second (time-
tagged epoch). Empty if PDOP unknown.
*cc Checksum
Description
Description
Range
0-359.99
*00-*FF
Range
000000.00-
235959.99
000.00-359.99999
±90.00000
±90.00000
Full range of real
variables
Full range of real
variables
0, >0
0, 1, 2
y.xxx
*00-*FF
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