Sun Sensor Performance in Earth's Shadow

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Discussion Overview

The discussion revolves around the functionality of a sun sensor when a satellite is in the Earth's shadow. Participants explore the implications for attitude determination systems that rely on sun sensors and other sensors like magnetometers.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants suggest that a sun sensor will not work when the satellite is in the Earth's shadow.
  • Others point out that attitude determination systems typically require multiple sensors, including a sun sensor and a magnetometer, raising questions about how attitude can be determined if the sun sensor is inactive.
  • A participant proposes further analytical questions regarding the construction and orientation of the sun sensor, specifically whether it senses light or heat and what it is aimed at.
  • One participant expresses confusion regarding the original question, indicating a lack of clarity in the discussion.
  • A request for clarification on what a sun sensor is has been made by another participant.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on whether a sun sensor can function in the Earth's shadow, and multiple competing views remain regarding its role in attitude determination.

Contextual Notes

There are unresolved questions about the specific design and operational principles of sun sensors, including their sensitivity to light or heat and their orientation in relation to the sun and Earth.

Who May Find This Useful

This discussion may be of interest to those studying satellite systems, sensor technology, or anyone curious about the operational challenges faced by satellites in varying conditions.

bookimal
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Hi,

Will a sun sensor work if the satellite is in the Earth's shadow?

thanks!
 
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Please, just think just a little bit on this.
 
I think it won't work..

but I'm reading things that says the attitude determining system uses a magnetometer and a sun sensor, and don't you need 2 sensors to work out the attitude? if the sun sensor doesn't work then it won't know the attitude..
 
Bookimal, first off... Welcome to PF.
As regards your posts—I'm really sorry to say that they are totally incomprehensible to me. I have no idea what you're talking about.
 
bookimal said:
I think it won't work..

but I'm reading things that says the attitude determining system uses a magnetometer and a sun sensor, and don't you need 2 sensors to work out the attitude? if the sun sensor doesn't work then it won't know the attitude..

I'm not being sarcastic in any way, but try this. Think of your original question and then ask yourself the more analytical/in depth questions of:
1. Is the sun sensor sensing light or heat (how is it constructed/designed).
2. Is the sun sensor aimed at the sun itself or sensing what is reflected off of the Earth (what's it's orientation, what is it aimed at).
 
Can any1 tell me what a sun sensor is??
 

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