GXB2000 Datasheet, PDF (28/60 Pages) Sony Corporation – 16-Channel GPS Receiver Module

GXB2000
2-3. DARC Data Input
DARC data is output in the communication format noted below. The D-GPS basic data is located in the D-GPS
segments. The D-GPS basic data is comprised of 288 bits (36 bytes).
Data packet 1
22 bytes
Prefix
4 bytes
D-GPS
segment
18 bytes
Data packet 2
22 bytes
Prefix
2 bytes
D-GPS
segment
18 bytes
CRC
2 byte
Checksum
1 byte
xxh
Terminator
1 byte
0Dh
The D-GPS basic data configuration is as follows.
Bit position
1 to 3
4
5 to 38
39 to 72
73 to 106
107 to 140
141 to 174
175 to 208
209 to 242
243 to 276
277 to 288
Description
D-GPS data ID
Correction time
1st GPS satellite correction data
2nd GPS satellite correction data
3rd GPS satellite correction data
4th GPS satellite correction data
5th GPS satellite correction data
6th GPS satellite correction data
7th GPS satellite correction data
8th GPS satellite correction data
Communication data
The GPS satellite correction data configuration is as follows.
Bit position
1
2 to 3
4 to 8
9 to 19
20 to 26
27 to 34
Description
Scale factor
UDRE (User differential range error index)
GPS satellite ID
PRC (Pseudorange correction value)
RRC (Pseudorange rate-of-change correction value)
IODE (Ephemeris data issue No.)
Number of bits
3 bits
1 bit
34 bits
34 bits
34 bits
34 bits
34 bits
34 bits
34 bits
34 bits
12 bits
Number of bits
1 bit
2 bits
5 bits
11 bits
7 bits
8 bits
S-20