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4.3.2 Data Logging Output Messages
4.3.2.1 LogData
When the LogData Dump command is sent to the receiver to retrieve the logged data in
binary format, each logged record is send out according to the format listed below with header
and footer described in section 4.2 added. The logged data is output consecutively until all
data stored in the on-board memory is sent out.
Byte # Contents Range Size Unit
1 Message ID = 0x22 Unsigned byte
2 ~ 3 Velocity mode[13]
DGPS[12]
velocity[9:0]
Unsigned 16bit integer
4 ~ 7 GPS Time GPS week [31: 20]
GPS tow [19: 0]
Unsigned 16bit integer
8 ~ 11 EFEC_X +/- 2^31 Signed 32bit integer meter
12 ~ 15 EFEX_Y +/- 2^31 Signed 32bit integer meter
16 ~ 19 EFEC_Z +/- 2^31 Signed 32bit integer meter
mode : Navigation mode ( 0=2D, 1=3D )
DGPS : 0 = no DGPS used, 1 = used DGPS correction
velocity[9:0] : velocity in m/s, range 0 ~ 1023
ECEF_X : ECEF coordinate X axis
ECEF_Y : ECEF coordinate Y axis
ECEF_Z : ECEF coordinate Z axis
4.3.2.2 LogConfig Info
When LogConfig Read or LogConfig Set command is sent to the receiver, data logging
configuration and percentage of the data buffer usage are returned in the format shown below:
Byte # Contents Range Size Unit
1 Message ID = 0x20 Unsigned byte
2 ~ 3 Buffer Used Percentage 0 ~ 10000 Unsigned 16bit integer 0.01%
4 ~ 5 Configuration
1 = log data
0 = stop logging data
Unsigned 16bit integer
6 ~ 7 delta_Tmin 0 ~ 65535 Unsigned 16bit integer Sec
8 ~ 9 delta_Tmax 0 ~ 65535 Unsigned 16bit integer Sec
10 ~ 11 delta_D 0 ~ 65535 Unsigned 16bit integer meter