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Projected ISS reboost requirements?



 
 
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  #1  
Old May 28th 06, 03:48 PM posted to sci.space.station
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Default Projected ISS reboost requirements?



Does there exist an estimate of, or can someone here calculate, what
the ISS reboost requirements will be in the coming years (i.e., out to
2010 or 2015) if construction goes more or less as now envisaged and
the solar cycle follows current predictions?

Perhaps the appropriate measure would be newton-seconds per year or
kilograms of propellant per year.

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Old June 3rd 06, 03:51 PM posted to sci.space.station
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Default Projected ISS reboost requirements?


Dr John Stockton wrote:

For the present rate of drop of about 1 mm/s, the drag is equivalent to
about 0.05 micro-g; for M = 200 tons, that's 0.1 N implying 3 MN-s/yr.


So if the reboost is done with the Progress main engine with a nominal
Isp 305 s = Ve ~= 3,000 m/s that's 3e6/3000 ~= 1,000 kg/yr of
propellant, no? That seems low from what I remember of the Progress
fuel capacity, but I may be misremembering.

 




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