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I am wondering if Mars' body provides enough protection against radiation on Phobos. The lack of magnosphere is a significant factor highly worsening the radiation exposure, making the planet difficult to survive on for mankind. On the other hand, Phobos is protected from the Sun by Mars.

A related diagram published by NASA based on their observations The figure is from Li et al. 2016.

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    $\begingroup$ Oh ok, this is probably a better site for the question, though it is probably on-topic in both places. Perhaps there were some helpful comments I'm remembering. It's certainly allowed to delete your own question before answers are posted, but for future reference there is also a process called migration where a site moderator can move your question from one site to another. This can preserve all helpful comments and links and any answers that might have appeared. It's not as fast as deleting/reposting but the advantages are that nothing is lost. Welcome to Space! $\endgroup$
    – uhoh
    Dec 27 '19 at 23:47
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    $\begingroup$ You can still find your deleted question (nothing is ever truly deleted in Stack Exchange) on your profile page under "recently deleted questions". If you feel any links in comments there are helpful you can repost the links here. $\endgroup$
    – uhoh
    Dec 27 '19 at 23:50
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    $\begingroup$ @uhoh Thank you, I updated my post. $\endgroup$
    – loceteg166
    Dec 29 '19 at 10:41
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    $\begingroup$ looks great, thanks; I wish I could upvote twice! $\endgroup$
    – uhoh
    Dec 29 '19 at 10:48
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Phobos, on its surface, has some protection against radiation beyond being just in deep space. But the real advantage comes where Phobos is easy to dig in to, and thus you could have a habitat under the surface of the planet.

But if you compared the surface of Mars and the surface Phobos facing Mars, you would probably get roughly equal exposure. The atmosphere of Mars will absorb some radiation, but on Phobos you have the same protection from half the sky as on Mars, plus whatever area Mars is will protect you from some portion of the sky. Not sure which effect would be stronger.

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