DR + GPS
STARTER KIT REFERENCE MANUAL
Lassen DR + GPS Reference Manual 109

0x29-05: Heading Initialization

The data in this message will change after initialization through fixes. To erase
heading initialization information, use the corresponding set command with
source byte equal to zero (Invalid / Clear). To override current heading estimates,
use “host override”.

Table 85: 0x29-05: Heading Initialization Report Message

Byte Name Type Units/LSB Range / Value Meaning
Code U8 0x29
Subcode U8 0x05
0 0-2 Source U3 0
1
2
3
Invalid / Clear
Host Input
Host Override
GPS Fix
0 3 Newness U1 0
1
From BBRAM
New
0 4 Heading Accuracy
status
U1 0
1
Acc’y Unknown
Acc’y Valid
1-2 Heading U16 2-15 sc [0, 2) sc.
3-4 Heading Accuracy U16 2-15 sc [0, 1] sc. 1-sigma accuracy
Real-Time Input Data
The following reports are used primarily for the input of serial data for real-time
aiding (e.g., DGPS corrections, map-match corrections) that are sent form the
host to the DR GPS module.