Maintenance Modes
O3b Operation and Maintenance from MtsVLink (ACU)
6-4
OceanTRx™4-500 O3b System Installation Guide
6.1.4
Re-Acquire (Program 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 using last selected Satellite TLE
When Signal raises above threshold activate
Program-Track
If timed-out – activate
Program-Route
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6.2.1
Point to selected Satellite
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.
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.
6.2.2
Manual
The Antenna is pointed towards the last commanded Orbital Longitude. A control screen
allowing manual incremental corrections is provided. If Manual mode is configured to "Sat
Arc", the "Azimuth" increments will move the Antenna onto the O3b Satellites sky Arc
6.2.3
Satellite Preset
Ask for Orbital Longitude (numeric float value in the range of -180.00 to 180.00
degrees)
Calculate Az/El view angles towards the O3b Arc
Point to O3b Arc location
Note that this mode does not use TLE information and will point to the commanded
Orbital Longitude only if Altitude and Constellation period parameters are set to
correct values.
