D Logs Summary
156 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
DOPB

Format: Message ID = 07 Message byte count = 68+(sats*4)

Field # Data Bytes Format Units Offset
1Sync 3char 0
(header) Checksum 1char 3
Message ID 4integer 4
Message byte count 4integer 8
2Week number 4integer weeks 12
3Seconds of week 8double seconds 16
4gdop 8double 24
5pdop 8double 32
6htdop 8double 40
7hdop 8double 48
8tdop 8double 56
9Number of satellites used 4integer 64
10 1st PRN 4integer 68
11... Next satellite PRN
Offset = 68 + (sats*4) where sats = 0 to (number of sats-1)