Seatex DPS 132 - GSA Telegram Format; GST Telegram Format

Seatex DPS 132 Installation Manual, rev. 0 Installation
32
GSA Message
The GSA message presents DOP values and satellites used in the position solution. The
message is as specified in NMEA 0183 versions 2.2, 2.3 and 3.0. The message structure is as
follows:
$GPGSA,m,s,ss,ss,ss,ss,ss,ss,ss,ss,ss,ss,ss,ss,pp.p,hh.h,vv.v*cc
Table 17 describes the GSA message fields.
Field Description
m Mode: M = manual, A = automatic.
s Mode: 1 = fix not available, 2 = 2D, 3 = 3D.
ss Satellites used in position computation: 1-32 for GPS satellites (satellite number), 0 for
unused fields.
pp.p PDOP (range 0 - 99.9).
hh.h HDOP (range 0 - 99.9).
vv.v VDOP (range 0 - 99.9).
*cc Checksum.
Table 17 GSA message fields
GST Message
The GST message presents pseudo-range error statistics. The message is as specified in
NMEA 0183 versions 2.2, 2.3 and 3.0. The message structure is as follows:
$GPGST,hhmmss.ss,r.rrr,a.aaa,b.bbb,e.eee,l.lll,y.yyy,h.hhh*cc
Table 18 describes the GST message fields.
Field Description
hhmmss.ss UTC of position (hours, minutes, seconds).
r.rrr RMS value of the standard deviation of the range.
a.aaa Standard deviation of semi-major axis of error ellipse (meters).
b.bbb Standard deviation of semi-minor axis of error ellipse (meters).
e.eee Orientation of semi-major axis of error ellipse (degrees from true north).
l.lll Standard deviation of latitude error (meters).
y.yyy Standard deviation of longitude error (meters).
h.hhh Standard deviation of altitude error (meters).
*cc Checksum.
Table 18 GST message fields
FSP ref.: A11211400XRBRA0