Data Logging - R&S SMW-K44 User Manual

Satellite Navigation

15 Data Logging

Data logging is a feature that enables you to acquire and download navigation data.
Data is acquired (i.e. logged) in real time or offline. Logged data is stored in files on the
hard disk, in any network directory or on a remote computer.
Download and offline postprocessing of navigation data can be useful source for basic
analysis, for example for validation of the received parameters, for monitoring or docu-
mentation tasks. For example, you can log the simulated longitude, latitude and alti-
tude parameters or the ionospheric errors and compare these values with the values at
the receiver.
Filename syntax
The generated files are stored in the selected
syntax log_<Mode>_<Logging_Category/
Format>[_<YYMMDD>_<HHMMSS>]_<Stream#>_<V#>_<A#>_<L#>, where:
●
<Mode> corresponds to the selected
●
<Logging_Category/Format> corresponds to the enabled category/format in
the
The available categories/formats are: Satellite, User Motion.
●
<YYMMDD>_<HHMMSS> is the system time, appended if
according Time
●
<Stream#>_<V#>_<A#>_<L#> indicate the logged stream, vehicle and antenna
number, and the RF band.
File format of the generated files
Logged navigation data is stored as *.csv files. The coma separated file format is
self-explanatory.
File content
Two kinds of parameters define the content of the logging files: parameters that set
what is logged and parameter that set how long and how often it is logged.
The logged data per file format and logging category is defined in the dialogs:
●
"Logged Satellite Paramters"
●
"Logged User Motion Parameters"
The time span, the number of logged records and the timestamp of the first logged
recorded are:
●
Time span
If logging is performed offline, the parameter "Duration" defines the time span that
is logged.
In real-time mode, the time span is the time that elapses between the moment you
start and stop the logging (select "On" and "Off").
●
Number of logged records
User Manual 1178.6379.02 ─ 01
Logging formats and categories
> "On".
Directory and their filenames follow the
"Mode" on page 173
table.
on page 177
on page 179
Data Logging
Store in Subdirectories
171