GM-R700 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C.
20
6.6 $GPGSV
This message transfers information about satellites in view. The $GPGSV message structure is shown
below. Each record contains the information for up to 4 channels, allowing up to 12 satellites in view. In
the final record of the sequence the unused channel fields are left blank with commas to indicate that a
field has been omitted.
Field Format
Min
chars
Max
chars
Notes
Message ID
$GPGSV
6
6
GSA protocol header.
Number of
messages
Int
1
1
Number of messages in the message
sequence from 1 to 3.
Message number Int
1
1
Sequence number of this message in
current sequence, form 1 to 3.
Satellites in view
Int
1
2
Number of satellites currently in view.
Satellite Id
Int
2
2
Satellite vehicle 1.
Elevation
Int
1
3
Elevation of satellite in degrees.
Azimuth
Int
1
3
Azimuth of satellite in degrees.
SNR
Int
(0) 1
2
Signal to noise ration in dBHz, null if the sv
is not in tracking.
Satellite Id
Int
2
2
Satellite vehicle 2.
Elevation
Int
1
3
Elevation of satellite in degrees.
Azimuth
Int
1
3
Azimuth of satellite in degrees.
SNR
Int
(0) 1
2
Signal to noise ration in dBHz, null if the sv
is not in tracking.
Satellite Id
Int
2
2
Satellite vehicle 3.
Elevation
Int
1
3
Elevation of satellite in degrees.
Azimuth
Int
1
3
Azimuth of satellite in degrees.
SNR
Int
(0) 1
2
Signal to noise ration in dBHz, null if the sv
is not in tracking.
Satellite Id
Int
2
2
Satellite vehicle 4.
Elevation
Int
1
3
Elevation of satellite in degrees.
Azimuth
Int
1
3
Azimuth of satellite in degrees.
SNR
Int
(0) 1
2
Signal to noise ration in dBHz, null if the sv
is not in tracking.
Checksum
*xx
(0) 3
3
2 digits.
Message
terminator
<CR> <LF> 2
2
ASCII 13, ASCII 10.
