Fallon
Super Member
The idea isn't to be a magnetic sweeper. It is to attach to a piece of debris tightly enough to push it into deorbiting in a controlled manner. This is zero gs, so it might not take much, and, rather than magnetic attraction, eddy currents might do the job. I've seen proposals to use harpoons. TBD if any of these ideas work, as the deorbiting satellite has to run down the debris, attach, and have enough propellant left over to get the whole shebang out of orbit without hitting anything else.
Definitely in the "lesser of two evils" category to me as I can't imagine what the insurance looks like.
All the best,
Peter
It actually takes a lot of energy. As much as it did to put it into orbit. Most of the energy in a satellite launch isn't getting it up out of the atmosphere it's getting it sped up to orbital velocity. The satellites are going a couple miles per second, 10-20,000mph. Slowing one down hundreds of miles an hour changes its orbit very slightly, but doesn't make it fall out of the sky.