D Logs summary

MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 223

WALB

Format: Message ID = 81 Message byte count = 92

Table D-13 Health and Status Bits

*Note: Read the binary output from the Health field from right to left. The first bit to the right, the least significant bit,
is bit 0 and so on to the left.

Table D-14 Data ID Type

Field # Data Bytes Format Units Offset
1Sync 3char 0
(header) Checksum 1char 3
Message ID 4integer 4
Message byte count 4integer 8
2Week number 4ulong weeks 12
3Seconds of week 8double seconds 16
4WAAS week number 4integer weeks 24
5WAAS seconds of week 4integer seconds 28
6WAAS satellite PRN number 4integer 32
7WAAS signal specification version 4integer 36
8WAAS satellite health 4integer 40
9Position x coordinate of WAAS satellite 8double meters 44
10 Position y coordinate of WAAS satellite 8double meters 52
11 Position z coordinate of WAAS satellite 8double meters 60
12 Velocity x coordinate of WAAS satellite 8dou ble m/s 68
13 Velocity y coordinate of WAAS satellite 8dou ble m/s 76
14 Velocity z coordinate of WAAS satellite 8dou ble m/s 84
Bit Number* Description Range Values
0Ranging 0 = On 1 = Off
1Corrections 0 = On 1 = Off
2Broadcast integrity 0 = On 1 = Off
3Reserved -
4-7 Service Provider ID -

Data ID Type (Service Provider)

0WAAS (Wide Area Augmentation System)
1EGNOS (European Geostationary Navigation Overlay Service)
2MSAS (Multi-Functional Transport Satellite (MTSAT) based Augmentation System)
3-15 Reserved