[amsat-bb] Satellite propulsion thrust equations

[G0MRF@xxxxxxx]

Hi folks.
 
Last week I saw the thread on the South African satellite, which rapidly  
developed into a "we need higher orbit satellites" discussion.
 
I wondered how high you need to go above a LEO orbit to get some reasonable  
coverage and scribbled a few 'daft' ideas at  _www.g0mrf.freeserve.MEOSAT.htm_ 
(http://www.g0mrf.freeserve.MEOSAT.htm) 
 
To take this forward, or to dismiss it as the case maybe...
My question is:   Is there any available software which can  calculate the 
increase in orbital height for particular changes in mass /  propellant / exhust 
velocity etc?
I've found various formulae at the NASA and ESA sites but there are so many  
variables its difficult to know where to start. - Well, it is rocket  science.
 
Regards
 
David  G0MRF
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