JLR-10 Instruction Manual.pdf - Echomaster Marine Ltd.

JLR-10 GPS Compass
GSA (GPS DOP and active satellites)
$GPGSA, a, x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx.x,xx.x,xx.x*hh
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 : Mode
M = Manual (fixed in 2D or 3D)
A = Automatic
2 : Dimension mode
1 = Fix not available
2 = 2D
3 = 3D
3 to14 : PRN numbers of satellites used in solution ("00" field when satellites are less than 12)
15 : PDOP (fixed length with 4 digits)
16 : HDOP (fixed length with 4 digits)
17 : VDOP (fixed length with 4 digits)
18 : Checksum
GSV (GPS satellites in view)
$GPGSV, x, x, xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx*hh
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1 : Total number of GSV messages (1 to 3)
2 : GSV message number (1 to 3)
3 : Total number of satellites in view (fixed length with 2 digits)
4 : 1st satellite PRN number (01 to 32) (fixed length with 2 digits)
5 : 1st satellite's elevation (00 to 90˚) (fixed length with 2 digits)
6 : 1st satellite's azimuth (000 to 359˚ true) (fixed length with 3 digits)
7 : 1st satellite's SNR (C/No) (00 to 99 dB) (fixed length with 2 digits)
8 to 11 : 2nd satellite's data (same procedure as 4 to 7)
12 to 15: 3nd satellite's data (same procedure as 4 to 7)
16 to 19: 4nd satellite's data (same procedure as 4 to 7)
20 : Checksum
DTM (Datum reference)
$GPDTM, ccc, a,,,,,,ccc*hh
1 2 3 4
1 : Local datum W84 - WGS84
W42 - WGS72
IHO - datum code
✽✽✽ - another datum number
2 : Local datum subdivision code
3 : Reference datum
Null or W84-WGS84
4 : Checksum
113