SEPTENTRIO PolaRx5TR, Reference Manual

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3 Command Line Reference
sem
gem
setElevationMask
getElevationMask
Engine
Engine
Mask
+ Tracking
+ PVT
all
-90 . . . 0 . . . 90 deg
RxControl: Navigation > Receiver Operation > Masks
Use these commands to set or get the elevation mask in degrees. There are two masks
defined: a tracking mask and a PVT mask.
Satellites under the tracking elevation mask are not tracked, and therefore there is no mea-
surement, nor navigation data available from them. The tracking elevation mask does not
apply to SBAS satellites: SBAS satellites are generally used to supply corrections and it is un-
desirable to make the availability of SBAS corrections dependent on the satellite elevation.
The tracking elevation mask does not apply to satellites that are manually assigned with the
setChannelAllocation
command.
Satellite under the PVT mask are not included in the PVT solution, though they still provide
measurements and their navigation data is still decoded and used. The PVT elevation mask
do apply to the SBAS satellites: the ranges to SBAS satellites under the elevation mask are
not used in the PVT, but the SBAS corrections are still decoded and potentially used in the
PVT.
Although possible, it does not make sense to select a higher elevation mask for the tracking
than for the PVT, as, obviously, a satellite which is not tracked cannot be included in the PVT.
The mask can be negative to allow the receiver to track satellites below the horizon. This can
happen in case the receiver is located at high altitudes or if the signal is refracted through
the atmosphere.
Example
COM1>
sem, PVT, 15<CR>
$R: sem, PVT, 15
ElevationMask, PVT, 15
COM1>
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