High Frontier can help Mars Direct

In a message dated 5/14/01 9:00:58 AM Eastern Daylight Time, mikecombs@...
writes:

<< I have heard estimates that
ionising radiation levels at the Martian surface, are a factor of three less
than those at the moons surface.

The figures that I've heard suggest that Mars may be a factor of two to
three less than free space. I suspect the moon would be a factor of two
below space (half of your surroundings is blocked by the moon), so I think
Mars has a slim margin over the moon. That to me makes sense, since the
only thing Mars presently has over the moon is an atmosphere only 1% as
dense as ours.
>>

On Phobos there is a crater called Stickney that is always facing Mars, I
wonder if Mars would fill the whole sky as seen from the bottom of Stickney
crater. If so then this would be a natural radiation free area since the
crater walls would protect from the sides, Phobos would shield from below and
Mars would block radiation from above.

Tom Kalbfus