The first target location, labeled 'adaptive tracking memory', is reserved for special purposes: If
you store to this target location, this saves the tracking parameters and the tracking memory as
well. When this memory location is recalled later on, the parameters and the memory contents
are restored. This may be useful to track another satellite for a couple of hours and then to
return to the first satellite. If the tracking memory has been saved before the antenna has been
moved to the second satellite, it may be restored after the antenna returned to the old position.
You should not use the first target location for general purposes in order to keep it available for
the short time storage described above.
Targets Page Example:
sat-nms ACUs with the tracking function installed give access to the tracking mode and the fine
tune parameter which lets you adapt the tracking to the individual requirements of the antenna
and the satellite you are tracking to. ACUs without tracking function show an empty page at this
place.
Trackingmode --- The tracking mode parameter selects the tracking method, the ACU
actually uses. Possible selection are:
OFF --- No tracking is performed.
STEP --- Step track mode. In regular intervals, the antenna performs small search steps
to optimize the pointing. Chapter
'8.3.0 Step Track'
gives more information about this
mode.
ADAPTIVE --- The adaptive tracking mode works the same way as step track, but it
additionally is capable to predict the satellite's position when the beacon reception fails.
It computes mathematical models of the satellites motion from the step track results
recorded over a certain time. Details about this tracking mode are given in chapter
'8.4.0 Adaptive Tracking'
.
PROGRAM --- The program tracking mode is different from the modes above. The ACU
moves the antenna along a path which is described in a data file. No beacon reception
is required for this. You have to create such a data file and copy it with FTP to the ACU
before you can use this mode. SatService GmbH provides a PC software which lets you
easily create data files for program track from commonly used ephemeris data sets for
geostationary satellites. Chapter
'8.5.0 Program Tracking'
describes this tracking mode
more detailed.
.ts CLEARMEMORYClicking to this mark clear the tracking memory. You should do this when you
start to track a new satellite. Clearing the tracking memory about half an hour after tracking
started significantly improves the quality of the first adaptive tracking model which will be
evaluated after 6 hours of tracking. This is because the model does not get disturbed by the first
(C) 2022, SatService GmbH
www.satnms.com
ACU-ODM-UM-2209 Page 30/73
