Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 331)

331 Appendix E Technical Reference Manual-4.0.0en
Format
$GPGSV,
x,
x,
xx,
xx,
xx,
xxx,
xx
.....,
xx,
xx,
xxx,
xx
*hh
<CR>
<LF>
GSV - GPS Satellites in View
Content
Header, incl. Talker ID, message sent from
Receiver
Total number of messages, 1 to 3
Message number, 1 to 3
Total number of satellites in view
Satellite PRN number
Elevation, degrees, 90° maximum
Azimuth, degrees True, 000 to 359
SNR (C/No) 00-99 dB, null when not tracking
2nd-3rd SV
4th SV
Checksum
Carriage Return
Line Feed
Note
- Satellite information may require the transmission of
multiple messages. The first field specifies the total
number of messages, minimum value 1. The second field
identifies the order of this message (message number),
minimum value 1.
- A variable number of “PRN-Elevation-Azimuth-SNR” sets
are allowed up to a maximum of four sets per message.
Null fields are not required for unused sets when less than
four sets are transmitted.
Format
$GPLLK,
hhmmss.ss,
mmddyy,
eeeeee.eee,
M,
nnnnnn.nnn,
M,
x,
xx,
x.x,
x.x,
M
*hh
<CR>
<LF>
LLK - Leica Local Position and GDOP
Content
Header, incl. Talker ID,message sent from
Receiver
UTC time of position
UTC date
Grid Easting, meters
Meter (fixed text “M”)
Grid Northing, meters
Meter (fixed text “M”)
GPS Quality
0 = fix not available or invalid
1 = No Realtime position, navigation fix
2 = Realtime position, ambiguities not fixed
3 = Realtime position, ambiguities fixed
Number of satellites used in computation
GDOP
Altitude above/below mean sea level for
position of marker. Note, if no orthometric
height is available the local ell. height will be
exported.
Meter (fixed text “M”)
Checksum
Carriage Return
Line Feed