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GSV
GPS Satellites in View
Number of satellites (SV) in view, PRN numbers,
elevation, azimuth and SNR value. Four satel-
lites maximum per transmission, additional
satellite data sent in second or their message.
Total number of messages being transmitted and
the number of messages being transmitted is
indicated in the first two fields.
1 2 3
4
5
6
7
GSV,x,x,xx,xx,xx,xxx,xx..........xx,xx,xxx,xx*hh<CR><LF>
1
Total number of messages, 1 to 3
2
Message number, 1 to 3
3
Total numer of satellites in view
4
Satellite PRN number
5
Elevation, degrees, 90 maximum
6
Azimuth, degrees True, 000 to 359
7
SNR (C/No) 00-99 dB, null when not tracking
8-9 2nd-3rd SV
10-11 4th SV
Notes: 1) 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.
2) 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.
38
8
9
10
11
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