Teejet RX 400p Manual do Utilizador descarregar pdf (Página 128)

RX 400p

98-05044 6-6

6.5.4 GST Data Message

The GST message contains Global Navigation Satellite System (GNSS) psuedorange

error statistics. Table 6-6, breaks down the GST message into its components. This

message has the following format:

$GPGST,hhmmss.ss,a.a,b.b,c.c,d.d,e.e,f.f,g.g *cc<CR><LF>

Table 6-6 GST Data Message Defined

Field Description

hhmmss.ss UTC time in hours, minutes, seconds of the GPS position

a.a Root mean square (rms) value of the standard deviation of the range inputs to the

navigation process. Range inputs include pseudoranges and differential GNSS

(DGNSS) corrections

b.b Standard deviation of semi-major axis of error ellipse (meters)

c.c Standard deviation of semi-minor axis of error ellipse (meters)

d.d Orientation of semi-major axis of error ellipse (meters)

e.e Standard deviation of latitude error (meteers)

f.f Standard deviation of longitude error (meters)

g.g Standard deviation of altitude error (meters)

*cc Checksum

<CR><LF> Carriage return and line feed

6.5.5 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 6-7 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>

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 150 151

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