RSA-1500L User Manual
13
RSA-1500L User Manual 
Geoid Separation    meters
Units  M  meters
Age of Diff. Corr.    second
Null fields when DGPS is not 
used 
Diff. Ref. Station ID  0000     
Checksum  *18     
<CR><LF> 
    End of message termination 
Table 2-3 Position Fix Indicators 
Value  Description 
0  Fix not available or invalid 
1  GPS SPS Mode, fix valid 
2  Differential GPS, SPS Mode, fix valid 
3-5  Not Supported GPS PPS Mode, fix valid 
6  Dead Reckoning Mode, fix valid 
2.1.2  GLL-Geographic Position –Latitude/Longitude 
Table 2-4 contains the values of the following   
Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C 
Table 2-4 GLL Data Format 
Name  Example
Units
Description 
Message ID  $GPGLL      GLL protocol header 
Latitude  3723.2475
  ddmm.mmmm 
N/S Indicator  N    N=north or S=south 
Longitude  12158.3416
  Dddmm.mmmm 
E/W Indicator    W    E=east or W=west 
UTC Position  161229.487
  hhmmss.ss 
Status  A    A=data valid or V=data not valid 
Mode  A    A=Autonomous, D=DGPS, E=DR 
Checksum  *2C     
<CR><LF> 
    End of message termination 










