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Copernicus GPS Receiver 197
TRIMBLE ASCII INTERFACE PROTOCOL (TAIP) B
LN Long Navigation Message
Note – The first character of latitude, longitude, altitude or vertical speed (S) is“+” or “-”.
Data String Format:
AAAAA.BBB(S)CCDDDDDDD(S)EEEFFFFFFF(S)GGGGGGHHIIIJ(S)KKKLM
MMNOOPPQQPPQQ...PPQQRRRRRRRRRRXT
Note – At least 2 satellites are required to get the LN Message.
Position is in degrees, minutes, and decimal minutes. Latitude is (positive north);
longitude is (positive east) WGS-84. Heading is in degrees from True North
increasing eastwards. The GPS time of day is the time of fix rounded to the nearest
second.
Note – The data in this message is to be considered invalid and should not be used if
the Age of Data Indicator is equal to 0 (signifying data not available).
Item # of
Char
Units Format Value
GPS Time of Day 8 Sec AAAAA.BBB
Latitude 10 Deg (S)CC.DDDDDDD
Longitude 11 Deg (S)EEE.FFFFFFF
Altitude above
MSL
9 Ft (S)GGGGGG.HH
Horizontal speed 4 MPH lll.J
Vertical speed 5 MPH (S)KKK.L
Heading 4 Deg MMM.N
Number of SVs
used
2n/aOO
SV ID (see note) 2 n/a PP
IODE (see note) 2 n/a QQ
Reserved 10 n/a RRRRRRRRRR
Fix Mode 1 n/a X 0=2D GPS
1=3D GPS
2-8 reserved
9=no fix avail.
Age of Data
indicator
1 n/a T 2=fresh,<10 sec.
1=old,>10 sec.
0=not available
Total number of characters is 65 + 4x (number of SVs used)