I'm not sure how to ask this one, so please bear with me.
Short question: How close to overhead of the launch site does the orbit of the ISS need to be to be within the window.
Long version: The ISS passes 16 times per day, so each pass is around 1500 miles apart. So if the shuttle can adjust its orbit (laterally?) by 750 miles, then I would assume a 50% chance of a launch window on any given day (if you want to launch in daylight). At 75 miles this would be 5%.
Are there other factors are required for launch window?
I know you can speed up and slow down relatively easily by changing altitudes (or the other way around)
Also; if there is lateral variation between orbit and launch, then does the launch turn into the orbit, or go into somewhat parallel orbit and then kind of slide sideways into the correct one?
Would the factors be similar in getting a geostationary orbit by not launching from the equator?
And the reason I ask? I heard the other day about the delay of the shuttle and the next launch window to the ISS being (some months?). So I was just trying to understand how that is determined.