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3

If my understanding of the question is correct, the OP is asking why exactly the CSM/LM stack longitudinal axis (from nozzle bell to pointy front end) was oriented perpendicular to ecliptic plane during Passive Thermal Control (PTC) mode, when it would've been also possible to orient it within the ecliptic plane thus maintaining the line of sight with Earth ...


1

The four antenna dishes were mounted at the bottom side of the Service module. For continous communication during a PTC the central roll axis of the CSM should be oriented towards the ground stations on Earth. The nozzle of the SM engine and the bottom of the SM should not pass between antennas and ground station during PTC roll to ensure continous radio ...


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