Another equally ineffective attempt at SAS inoculation was to sleep on an incline with your head lower than your feet. This became popular when the flight surgeons hypothesized that the fluid shift of weightlessness might be causing the inner ear to be disturbed, inducing vomiting. All astronauts experience an uncomfortable eye-popping fullness in the head during weightlessness because of an equalization of body fluid. By sleeping in a bed with bricks under the foot posts to tilt the head down, it was thought the resulting fluid shift to the upper body would somehow prepare it for weightlessness and eliminate SAS. It didn’t. Some of those practicing head-down sleep still got sick in space, suggesting that those head-downers who didn’t vomit had probably been immune anyway. To this day doctors are baffled by the cause of SAS and it continues to affect nearly 50 percent of astronauts.
As the calendar turned to 1983, my fifth year as a TFNG, I was suffering from something far worse than SAS—the depression of being an unassigned astronaut. That status had me doubting everything about myself—my abilities, my personality, even my astronaut friends.
I continued my drab life. I would pull into the Building 4 parking lot by 7:30A.M . so I could fight for a parking space (cringing at the sight of the assigned TFNGs pulling into their reserved parking places), attend some SAIL-related meetings, go to the mail room to sign autographs (wondering why anybody would want mine), go to the gym to exercise, eat lunch in the cafeteria (to catch up on the latest rumors), attend more meetings or study shuttle-training schematics, perhaps take a T-38 flight (if the assigned crews had left any), then go home. On my SAIL days I would pull one of the eight-hour shifts of its 24/7 operation. If I was lucky, I would be called to the SMS for some real shuttle training as a substitute crewmember. When Guy Bluford was absent for an STS-8 simulation I received such a call and eagerly jumped on it.