Operational (TLE Based) Modes
O3b Operation and Maintenance from MtsVLink (ACU)
6-2
OceanTRx™4-500 O3b System Installation Guide
6.1.2
Program Track (and Peak)
Periodically re-peak the Antenna on signal maxima with respect to O3b Satellite Arc
with the Azimuth-Elevation Satellite view angles constantly recalculated using selected
Satellite TLE.
If the signal times out below the threshold level or Antenna view is blocked,
Re-
Acquire (Program Search)
mode is automatically invoked.
If the signal is re-acquired (exceeds the threshold by a predefined "epsilon"), the
Antenna reverts back to
Program Track
If
Re-Acquire
mode times out, the Antenna reverts to
Program Route
, but still if
the signal re-appears, the Antenna will automatically resort to
Program Track
Note that the
Re-Acquire
Timeout may be set to 0.0, thus causing the Antenna to
revert straight to
Program Route
in case of signal loss.
Note that “Program Track” cannot be activated from the Operational screen as a
stand-alone mode. It is used as a sub-mode in “Acquire Program Track” batch below.
6.1.3
Acquire Program Track
This is the nominal operation mode for O3b project. It operates according to the O3b
Constellation screen parameters as well as the parameters in its configuration menu:
Acquire Program Track automatically points the Antenna to the Scheduled O3b
Satellites using their TLE data. Furthermore it controls the weather to transmit onto a
Satellite or not, in order to achieve correct Dual-Antenna Tracking and Handover.
The differentiation for the ACU roles when paired together, is according to "Tx
Permission" parameter: one ACU would normally be set-up "For Even Satellites"
whereas the other "For Odd Satellites"
Note that if the CCU Monitoring is checked, the ACU will automatically disable its Tx, if
the communications with CCU is stopped for over the Timeout defined seconds.
