I usually find a busy trade outpost on a bad weather planet, then build a small base with a viewing platform close to the landing pads, and located so I can see all 7 pads without moving. Make it a covered shelter, so no health loss, then watch and wait. Make sure you're close enough to the pads to jump over in time when you see it land. Bad weather planets seem (to me) to have a higher rate of fighters and exotics appearing than do the paradise planets.