CSI Wireless GBX, Справочное руководство

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GBX Reference Manual 55
Table 4-4 GSA Data Message Defined
Field Description
a Satellite acquisition mode M = manually forced to 2D or 3D, A = automatic swap
between 2D and 3D
b Position mode, 1 = fix not available, 2 = 2D fix, 3 = 3D fix
cc to oo Satellites used in the position solution, a null field occurs if a channel is unused
p.p Position Dilution of Precision (PDOP) = 1.0 to 9.9
q.q Horizontal Dilution of Precision (HDOP) = 1.0 to 9.9
r.r Vertical Dilution of Precision (VDOP) = 1.0 to 9.9
*cc Checksum
<CR><LF> Carriage return and line feed
4.8.4 GSV Data Message
The GSV message contains GPS satellite information. Null fields occur
where data is not available due to the number of satellites tracked.
Table 4-5 breaks down the GSV data message into its components.
This message has the following format:
$GPGSV,t,m,n,ii,ee,aaa,ss,…ii,ee,aaa,ss,*cc<CR><LF>
Table 4-5 GSV Data Message Defined
Field Description
t Total number of messages
m Message number, m = 1 to 3
n Total number of satellites in view
ii Satellite number
ee Elevation in degrees, ee = 0 to 90
aaa Azimuth (true) in degrees, aaa = 0 to 359
ss SNR (dB), ss = 0 to 99
*cc Checksum
<CR><LF> Carriage return and line feed