India Demonstrates Anti-Satellite
NASA did not 'get it wrong'. They said (as I did) that it was an irresponsible act. I don't think that they have predicted that the debris will be highly persistent in the way that certain previous anti-satellite missile have been. They did, however, point out that solar minimum was a particularly bad time to have done this, which I hadn't thought of.
Thank you. Am I correct in assuming that some debris will pass through the ISS orbit altitude?
Do you assume constant energy? If so wouldn't the interceptor have increased the overall energy of the system?
Do you assume constant energy? If so wouldn't the interceptor have increased the overall energy of the system?
No, you don't have to assume a constant energy. Any input of energy at perigee cannot influence the altitude of the perigee regardless of how much you add. Even so, assuming that the warhead was kinetic and the impact was close to head on (as the animations suggest), then the mean orbital velocity of the constituent parts of the satellite should have been lowered slightly. Nevertheless, the distribution of energy between individual fragments would have been very non-uniform, with some particles re-entering, and some being given a lot of additional energy.