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Galaxy 15 Fly-by Procedure Preparations for Galaxy 23
Given that the solution for mitigating interference is different for each customer case, we are gathering technical requirements from each of our customers independently and developing customized mitigation plans and maneuvers. The following provides a general overview of our plans for the fly-by of the Galaxy 23 satellite.
Fly-by Interference Mitigation Plans for Galaxy 23
Fly-by plans for the Galaxy 23 satellite are being communicated to all Galaxy 23 customers. We have examined various scenarios and have established a plan for the Galaxy 23 fly-by, which begins 22 August (with the closest pass occurring on 26 August).
•Intelsat will employ techniques demonstrated during the Galaxy 13 and Galaxy 18 fly-bys to mitigate interference to Galaxy 23 services.
•Galaxy 23 is a multi-band (C/Ku) satellite, which limits its ability to maneuver in a similar fashion to Galaxy 13 & Galaxy 18, rendering a turn less effective.
•Attenuation will be removed from all Galaxy 23 transponders to minimize multipath from Galaxy 15. This technique provides sufficient protection against multipath for most links, even when the satellites are at their closest proximity.
•Link analysis results have been validated on a ground simulator in the lab with positive results.
•Galaxy 23 will be maneuvered within the orbital box
(+-0.05) to maximize separation from Galaxy 15.
For all Fly-bys, receive station engineers play a vital role in the success of these plans, as follows:
•Ensure your receive antenna is properly peaked at the center-of-box of the satellite from which you are receiving signals. Intelsat’s interference elimination strategy is based on all receive antennas being peaked at the center-of-box at all times during the fly by.
◦Center-of-box Information for Galaxy Fleet
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