R&S SMW-K44, User Manual

Page: 47 / 455

Receiver Type and Position Satellite Navigation
47 User Manual 1178.6379.02 ─ 01
Waypoints File
Selects a predefined or user-defined waypoint files to simulate a moving scenario.
A waypoint file is description of a moving scenario with possibly attitude coordinates
that can have different forms, like, for example, a sequence of positions or vector arc
movement. A waypoint file must have the extension
*.txt
,
*.nmea
,
*.kml
or
*.xtd
.
See also Chapter A.1, "Movement or Motion Files" , on page 390 for detailed descrip-
tion of the file formats.
The parameters "Latitude", "Longitude" and "Altitude" are set according to the first
simulated position defined in the selected file. Current trajectory is schematically
visualized, too.
To observe the graphical display in greater detail, select "Receiver > Monitor".
Remote command:
[:SOURce<hw>]:BB:GNSS:RECeiver[:V<st>]:LOCation:WAYPoints:FILE
on page 231
Readout Mode
Defines the way the waypoint/attitude file is processed.
If
*.xtd
files are used, the "Readout Mode" is retrieved from the file
(
<endbehaviour>
) and cannot be changed, see Chapter A.1.4, "Trajectory Descrip-
tion Files" , on page 394.
"Cyclic" The waypoint file is processed cyclically. Once the last waypoint is
reached, file processing starts again form the beginning.
Using this mode is only recommended if the waypoint file describes
on of the fowlloing:
●
A circle moving scenario
●
A moving scenario in which the start and the end point are close
to each other.
"One Way" The file is processed once.
By reaching the end of the file, the last described position is assumed
to be a static one.
"Round Trip" By reaching the end of the file, the file is processed backwards.
Remote command:
[:SOURce<hw>]:BB:GNSS:RECeiver[:V<st>]:LOCation:WAYPoints:ROMode
on page 231
Reference Frame
Select the reference frame used to define the receiver coordinates.
The transformation between the reference frames is performed automatically.
The following applies:
●
X
WGS84
= (1 - 0.008*10 -6 )*X
PZ 90
- 0.2041*10 -7 *Y
PZ 90
+ 0.1716*10 -7 *Z
PZ 90
- 0.013
●
Y
WGS84
= (1 - 0.008*10
-6
)*Y
PZ 90
- 0.2041*10
-7
*X
PZ 90
+ 0.1115*10
-7
*Z
PZ 90
+ 0.106
●
Z
WGS84
= (1 - 0.008*10
-6
)*Z
PZ 90
- 0.1716*10
-7
*X
PZ 90
- 0.1115*10
-7
*Y
PZ 90
+ 0.022
Both reference frames are ECEF frames with a set of associated parameters.
"WGS-84" The World Geodetic System WGS-84 is the reference frame used by
GPS.
Moving Receiver