So Ive read the highest skydive occured from a ballon and the entire jump lasted on the order of 10s of minutes. Heres my question: How the do you know where your gonna land? The earth rotates at ~1000mi per hour thats 12 mi per minute or 2.7 miles per 10 secs. So did these people use radar or something to time the exact time to jump? If you jump ~30 sec off target you land 10 miles off course. Does anyone know how they accounted for this? Say you have a bit of a problem jumping and have to wait 1.5 minutes to jump- your 30 miles off target.