Tri-M Systems FV-25 GPS Receiver User Manual


 
89
CFG – DAT (0x06 0x06)
It’s a poll request. Poll datum setting. The module will respond the same message
defined below (I/O message).
Header ID Data Length Data Checksum
0xB5 0x62 0x06 0x06 0 None CK_A CK_B
CFG – DAT (0x06 0x06)
It’s an input message. Set the standard datum.
Header ID Data Length Data Checksum
0xB5 0x62 0x06 0x06 2 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U2 Datum number Referred to Appendix A
CFG – DAT (0x06 0x06)
It’s an input message. Set user-defined datum.
Header ID Data Length Data Checksum
0xB5 0x62 0x06 0x06 44 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 R8 Semi-major axis (m) 6,300,000.0 ~ 6,500,000.0
8 R8 1.0/flattening 0.0 ~ 500.0
16 R4 Offset from the origin – X axis
(m)
-5000.0 ~ 5000.0
20 R4 Offset from the origin – Y axis
(m)
-5000.0 ~ 5000.0
24 R4 Offset from the origin – Z axis
(m)
-5000.0 ~ 5000.0
28 R4 Rotation about X axis (milli-arc
seconds)
-20.0 ~ 20.0
32 R4 Rotation about Y axis (milli-arc
seconds)
-20.0 ~ 20.0
36 R4 Rotation about Z axis(milli-arc -20.0 ~ 20.0