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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 # 

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: 

   

1 

Message ID = 0x20 

 

Unsigned byte 

 

2 ~ 3  Buffer Used Percentage  0 ~ 10000 

Unsigned 16bit integer 

0.01% 

4 ~ 5  Configuration 

 

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