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The SLOG interface in the command window supports real time data display. By pressing the 'L' key
when the SLOG script is running a summary display including signal tracking information will be
provided in the command window.
SLOG will automatically log all raw data collected from the GPStation-6 receiver to *.GPS file(s) for
post-processing. The NovAtel data parsing utilities described in the next section can be used along
with Excel, MatLab or any other data processing software (including custom software) to process and
analyze the raw data as desired.
2.7
TEC Calibration
2.7.1
What is TEC?
Total Electron Content (TEC) is an important descriptive quantity for the ionosphere of the Earth.
It is defined as the total number of electrons present along a path between two points and is significant
in determining the group delay of a radio wave through a medium.
2.7.2
How does TEC affect GNSS?
Ionospheric TEC is characterized by observing carrier phase delays of received radio signals
transmitted from satellites located above the ionosphere (e.g., GNSS). It is strongly affected by solar
activity.
25
10
electrons/m
= 1 TEC unit (TECU)
16
2
Figure 4: Ionospheric TEC Characterized
Ionosphere
Reference Station
Baseline
Mobile Station
GPStation-6 User Manual Rev 2
Operation
Satelite
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