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Lassen-SK8 Embedded GPS Module C-11
Trimble ASCII Interface Protocol (TAIP)
The format of the data string is as follows:
AAAABBCC{DDEEEEFFGG}
Table C-9. RTCM-104 Record Types 1 and 9 Data String Descriptions
The units and scale factors are as defined by RTCM-104 version 1. The SV PRN and
health contains the SV PRN in the lower 5 bits and the health/UDRE/scale factor in the
upper 3 bits. Range corrections are scaled by 0.02 meters times 2 raised to the health
power. Range-rate corrections are scaled by 0.002 meters per second times 2 raised to the
health power.
*
Note – The DC and DD TAIP messages described herein apply only to differential ready
sensors and are provided to enclose differential corrections within the TAIP format.
Use of DC and DD messages to input corrections requires only one communications
channel. Use of the auxiliary port to input RTCM-104 corrections assumes a separate
communications channel is available for broadcast and receipt of differential corrections.
The TAIP software toolkit, GPSSK, does not support DC and DD messages.
Item # of Char Type UNITS Format
Modified Z-count 4 WORD .6 sec AAAA
Station health 2 BYTE n/a BB
Number of SVs 2 BYTE n/a CC
The next 5 bytes (10 characters) are repeated for each SV
SV PRN & health
(UDRE) 2 BYTE n/a DD
Range Correction 4 WORD RTCM-104 EEEE
Range-rate
correction
2 BYTE RTCM-104 FF
IODE 2 BYTE n/a GG