TeeJet RX 400p - Manual (Page 128)

RX 400p
98-05044 6-6
R1
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
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
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