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■GSA (Positioning status and DOP information)
Version 2.1
$GPGSA, a, x, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx.x, xx.x, xx.x*hh<CR><LF>
1 2 3 4 5
Versions 2.3 and 4.0
$GPGSA, a, x, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx.x, xx.x, xx.x*hh<CR><LF>
1 2 3 4 5
1
: Positioning mode
A=automatic selection
2
: Positioning dimension
3=3 dimensional positioning
3 to 14
: (fixed 4-digit length) (Version 2.1) (Version 2.1)
15
: PDOP (fixed 4-digit length) (Version 2.1)
16
: HDOP (fixed 4-digit length) (Version 2.1)
17
: VDOP (fixed 4-digit length) (Version 2.1)
18
: Check Sum (Version 2.1)
3 to 14
: (fixed 4-digit length) (Versions 2.3 and 4.0)
15
: PDOP (fixed 4-digit length) (Versions 2.3 and 4.0)
16
: HDOP (fixed 4-digit length) (Versions 2.3 and 4.0)
17
: VDOP (fixed 4-digit length) (Versions 2.3 and 4.0)
18
: Check Sum (Versions 2.3 and 4.0)
■GSV (Visible satellite reception status information)
Versions 2.1, 2.3, and 4.0 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
1
: Total number of GSV messages (1 to 3) (Version 2.1)
2
: GSV message sequence number (1 to 3) (Version 2.1)
1
: Total number of GSV messages (1 to 4) (Version 2.3)
2
: GSV message sequence number (1 to 4) (Version 2.3)
3
: Number of visible satellite
4
: PRN number of 1
Indicate the SBAS satellites from 120 to 138 with the numbers from 33 to 51 (Version 2.3)
Reserve 33 to 64 for SBAS satellites. (Version 2.3)
5
: 1
st
satellite elevation angle (00 to 32) (fixed 2-digit length)
6
: 1
st
satellite bearing angle (00 to 90 degrees) (fixed 3-digit length)
st
7
: 1
satellite SNR signal intensity C/No (00 to 99B) (fixed 2-digit length)
nd
8 to 11
: 2
satellite information (same as 4 to 7)
rd
12 to 15
: 3
satellite information (same as 4 to 7)
th
16 to 19
: 4
satellite information (same as 4 to 7)
20
: Check Sum (Version 2.1/2.3)
Note: Since one GSV sentence is formed by signals received from 4 satellites, the number of GSV
sentences varies according to the number of satellites.
Section 14 Appendix/Reference Materials
6 7 8
9 10 11 12 13 14 15
6 7 8 9 10 11 12 13 14 15
M=Manual selection (fixed to 2 dimension or 3 dimension),
6
7 8 9 10 11 12 13 14 15 16 17 18 19 20
st
satellite (01 to 32) (fixed 2-digit length)
16
17 18
16
17 18
1=No positioning, 2=2 dimensional positioning,
14-24
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