JRC JLR-21, Инструкция по эксплуатации

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Appendix 2-7
 GSV - GNSS satellites in view
Version 2.1, 2.3 only
$GPGSV, x,x,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
IEC
$GPGSV, x,x,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,xx,xx,xxx,xx,1*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1: Total number of GSV messages (1 - 3) (Version 2.1)
2: GSV message number (1 - 3) (Version 2.1)
1:
Total number of GSV messages (1 - 4) (Version 2.3, IEC)
2: GSV message number (1 - 4) (Version 2.3, IEC)
3:
Total number of satellites in view
4:
1st Satellite ID number (01 - 32)
SBAS satellites 120 to 138 are represented by 33 to 51. (Version 2.3, IEC)
33 to 64 are reserved for SBAS satellite use.
(Version 2.3, IEC)
5: 1st satellite Elevation, degrees, 90° maximum
6: 1st satellite Azimuth, degrees true, 000 to 359
7: 1st satellite SNR (C/No) 00-99 dB-Hz, null when not tracking
8 - 11: 2nd satellite information
(same as 4 - 7)
12 - 15:3rd satellite information (same as 4 - 7)
16 - 19:4th satellite information
(same as 4 - 7)
20: Checksum (Version 2.1, 2.3)
20: Signal ID 1: fixed
21: Checksum
Note1
Each GSV sentence includes 4 satellites, so the number of GSV sentences
varys based on
the number of satellites detected.
 MSS - MSK beacon receiver signal status
Version 2.1
$GPMSS,
ＩＩＩ
,SSS,FFF.F,BBB*hh<CR><LF>
1 2 3 4 5
Version 2.3
$GPMSS,
ＩＩＩ
,SSS,FFF.F,BBB,x*hh<CR><LF>
1 2 3 4 5 6
1: Signal strength (SS), dB/1 μ V/m
2: Signal-to-noise ratio (SNR), dB
3: Beacon frequency, kHz
4: Beacon bit rate, bits/s
5: Checksum (Version 2.1)
5: Channel Number "1" or null (Version 2.3)
6: Checksum (Version 2.3)