DR + GPS
STARTER KIT REFERENCE MANUAL
Lassen DR + GPS Reference Manual 106
0x29-02: Latitude / Longitude Initialization
The data in this message will change after initialization through fixes. To erase
latitude / longitude initialization information, use the corresponding set command
with source byte equal to zero (Invalid / Clear). To override current latitude and
longitude estimates, use “host override”.
Latitude and longitude initialization must be done before altitude initialization.
Table 82: 0x29-02: Latitude / Longitude Initialization Report
Byte Name Type Units/LSB Range / Value Meaning
Code U8 0x29
Subcode U8 0x02
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 Lat/Lon Acc’y Status U1 0
1
Acc’y Unknown
Acc’y Valid
1-4 Latitude S32 2-31 sc [-½, ½] sc.
5-8 Longitude S32 2-31 sc [-1, 1) sc.
9-12 Latitude Accuracy U32 2-31 sc [0, 1) sc. 1-sigma accuracy
13-16 Longitude Accuracy U32 2-31 sc [0, 1) sc. 1-sigma accuracy
17-20 Lat/Lon Correlation FLT unitless [-1.0,1.0]