ISS reboost calculations

[garyw]

The other night, I was trying to work out how much altitude gain I'd get with a given amount of thrust from a space vehicle and I couldn't work it and nor could I find an equation that would give me the result I was after.

So, can someone please provide me with an equation that I can use to work out ho much thrust I need to gain an altitude increase of X km?

thanks.

 

[boogabooga]

It's not thrust that matters so much as Delta-V.

https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

Once you know delta-V, you can for example use:
https://en.wikipedia.org/wiki/Vis-viva_equation

Compare semi-major axis for V and V plus deltaV at the same r.

I actually have a spreadsheet that does what you are talking about that I made for myself, if you have access to Excel. Or just tell me exactly what the problem is.

 

[ADSWNJ]

The thrust vector for the boosting bessel would be interesting to calculate. If the docking port is not precisely aligned with the COG, you would immediately generate a rotation on one or more axes. You would need a combination of the ISS's stabilizing gyros, its thrusters, and the boosting vessel thrusters to counteract the rotation, or gimballed main thrusters,

 

[garyw]

It's not thrust that matters so much as Delta-V.

I actually have a spreadsheet that does what you are talking about that I made for myself, if you have access to Excel. Or just tell me exactly what the problem is.

Cheers for this, I'd love to have a look at your formula for this. It's not a problem, just one of those "I wonder how..." moments when messing with Orbiter. My math skills are pretty poor compared to most peoples here hence the shout out for help!