Maintenance Modes
O3b Operation and Maintenance from MtsVLink (ACU)
6-6
OceanTRx™4-500 O3b System Installation Guide
6.2.8
Acquire Satellite
This is a batch, activating Point-to-Satellite and then Step-track modes one after
the other:
Point to selected O3b Satellite Arch location. If below the Horizon, move to
the point of expected ascend at Minimal Elevation defined in Program Track
configuration (default of 0.0 degrees). To select an O3b Satellite – use the
O3b Constellation screen
Move the antenna on the O3b Arch, until the point of descend below Minimal
Elevation. The movement is calculated as per simple trigonometric trajectory
based on the parameters fed in the General Parameters of the O3b
Constellation screen: Orbital Phase, Altitude, Constellation period.
Periodically re-peak the Antenna on signal maxima with respect to O3b
Satellite Arc with the Azimuth-Elevation Satellite view angles constantly
trigonometrically recalculated using Altitude and Constellation Period
parameters.
If the signal times out below threshold,
Search
mode is automatically
invoked.
If the signal is re-acquired (exceeds the threshold by a predefined
"epsilon"), the Antenna reverts back to
Step-track
Note that this mode does not use TLE information and will point to a Satellite
only if Orbital Phase, Altitude, Constellation period parameters are set to
correct values
6.2.9
Search
Move Antenna in increasing Longitude swings, back and forth along the O3b Arc,
around last selected view angle location
Combine the Search swings with movement of the antenna on the O3b Arc, calculated
trigonometrically using O3b Constellation Period and Altitude
When Signal raises above threshold activate
Step-Track
If timed-out – activate selected revert mode
