Reference Information
LD8 Operations Manual
AB- V-MA-00635_RevA6
35
5.3.6 GSV Sentence
The NMEA GSV sentence provides information relating to the number of satellites (SV) in view, satellite ID
numbers, elevation, azimuth, and SNR value in one sentence.
GSV Sentence Structure & Example
$GPGSV, a, b, cc, dd, ee, f ff, gg, dd, ee, f ff, gg, dd, ee, f ff, gg, dd, ee, f ff, gg, *hh,
$GPGSV, 4, 1, 13, 02, 10, 043, 41, 05, 05, 103, 38, 10, 04, 238, 42, 12, 13, 030, 44, *7E,
(Satellite 1)
(Satellite 2)
(Satellite 3)
(Satellite 4)
GSV Sentence Defined
Field
Content
GSV
GNSS Satellites in view
a
Total number of sentences (1-9)
b
Sentence number (1-9)
cc
Total number of satellites in view, within the talker ID constellation
dd
Satellite ID number
GPS = 1 to 32
GLONASS = 65 to 96
ee
Elevation, degrees (90° maximum)
fff
Azimuth, degrees true, 000 to 359
gg
SNR (C/No) 00-99 dB-Hz, null when not tracking
hh
Checksum
NOTE
Fields dd, ee, fff and gg will be repeated a maximum of 4 times per sentence, where all
satellite info is already output null values will be output.
5.3.7 GLL Sentence
The NMEA GGL sentence provides Latitude and Longitude position data for the present position.
GLL Sentence Structure & Example
$GNGLL, ddmm.mmmmmmm, a, dddmm.mmmmmmm, b, hhmmss.ss, S, I *hh
$GNGLL,
5708.7104685, N,
00217.1169613, W, 062859.00, A, D *72
GLL Sentence Defined
Field
Content
GLL
Geographic position - Latitude and Longitude
ddmm.mmmmmmm
Latitude of position
a
Latitude direction (N or S)
dddmm.mmmmmmm
Longitude of position
b
Longitude direction (E or W)
hhmmss.ss
UTC time of position
S
Status (A = data valid ; V = data not valid)
I
Positioning mode indicator (A = Autonomous, D = Differential,
E = Estimated (Dead reckoning), M = Manual, N = Data not valid)
*hh
Checksum