Reading this question, what is the best way to make sure most of ISS (or any other large object planned to be destroyed in the atmosphere) will burn and break into relatively small pieces in the atmosphere?
For instance, will it be a retrograde burn? Or will there be some radial composant in this burn, in order to raise apogee, and make a more brutal/steeper entry? For a given amount of de-orbit fuel, what's the best de-orbit burn profile?
Edit: It may be completely irrelevant in comparison with reality, but:
I tested something using stock KSP. Initial conditions (using orbit cheat) is perfectly circular orbit at 86750m Spacecraft setup is one large command pod (white apollo like) one heatshield, two sepratrons (simulating identical de-orbit delta V)
First de-orbit burn was retrograde. resulting perigee was 52966m, ablative material used during re-entry : 153
Second de-orbit burn was 45 deg. between retrograde and radial. Resulting perigee was 60355m, ablative material used : 161
Which would mean, for identical de-orbit delta V, burning with radial composant raises apogee immediately after burn, but leads to higher perigee too (less steep entry) More heat is produced, and landing site is less predictable.