re: Wasn't there a solar activity issue?
There is always some drag - even when the sun is quiet. Solar activity swells the Earth's atmosphere and the drag is increased - necessitating more frequent reboost burns.
Space/Science » in reply to Wasn't there a solar activity issue?
There is always some drag - even when the sun is quiet. Solar activity swells the Earth's atmosphere and the drag is increased - necessitating more frequent reboost burns.