Light sail SPS; Sun-Earth L1 (was Correcting my own math -- CORRECTED)

Am 04.02.2012 19:35, schrieb Al Globus:
>
> On Feb 3, 2012, at 11:21 PM, hitssquad wrote:
>
>>
>>
>> --- In spacesettlers@yahoogroups.com, Frank wrote:
>>> I would propose a combination of solar sailing and solar electric.
>>
>> Keith Henson already addressed this proposal three years ago on the
>> SSI list. See the archive links I just posted previously.
>>
>> Henson concluded it couldn't work on the basis of the fact that the
>> original problem is that sunlight pushes the powersats away from the
>> sun. How is a solar sail supposed to stop that phenomenon, rather
>> than simply exacerbate it?
>>
> Keith and I have corresponded on this. Keith has not run any sims on
> the issue (that I know of). I have. The results are pretty simple:
> its a fairly minor problem that can be dealt with by a little station
> keeping.

What does little station keeping mean?
If you have to do that for a couple of years, how does this add up when
time passes by? How often would be refuelling neeeded and with it
transport of fuel from Earth to GEO?

How much fuel does a square km sized power sat need, to compensate for a
constant thrust of about 4.5 N through SRP?

What simulation software did you use, is it a software which specially
addresses solar sailing situations?

Best wishes

Frank