Menu Receiver Pos; Menu Sv Constellation - Meinberg LANTIME/GPS Operating Instructions Manual

Menu RECEIVER POS.

This menu shows the current receiver position. The NEXT key lets the user select
one of three formats. The default format is geographic latitude, longitude and altitude
with latitude and longitude displayed in degrees, minutes and seconds. The next
format is geographic, too, with latitude and longitude displayed in degrees with
fractions of degrees. The third format displays the receiver position in earth centred,
earth fixed coordinates (ECEF coordinates). The three formats are shown below:
Lat:51°59'06''N Lon: 9°13'30''E Al: 110m
Lat: 51.9851°
x: 3885422m

Menu SV CONSTELLATION

The SV constellation menu gives an overview of the current satellites (SVs) in
view. The second line of the display shows the number of satellites with an elevation
of 5° or more (In view), the number of satellites that can be used for navigation
(Good) and the selected set of satellites which are used to update the receiver position
(Sel).
In view: 9
The precision of the computed receiver position and time is affected by the geometric
constellation of the four satellites being used. A set of values called dilutions of
precision (DOP) can be computed from the geometric constellation. Those values can
be displayed in a submenu of the SV constellation menu. PDOP is the position
dilution of precision, TDOP is the time dilution of precision, and GDOP, computed
from the others above, is the general dilution of precision. Lower DOP values mean
more precision.
PDOP:
RECEIVER POSITION
RECEIVER POSITION
Lon: 9.2253°
RECEIVER POSITION
y: 631059m
SATELLITE CONSTELLATION
Good: 8
DILUTION OF PRECISION
4.33 TDOP: 2.88
26
Al: 110m
z: 5001868m
Sel: 3 19 26 13
GDOP: 5.20