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Sources
kevinforsyth.net
To Reach the High Frontier: A History of U.S. Launch Vehicles
"A valuable contribution to the field of aerospace literature," this book includes an extensive overview of Delta history and development along with chapters on Atlas, Titan, Scout, Space Shuttle, and much more.
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Many other excellent books about spaceflight are recommended here.
19-Apr-04 | GP-B scrubbed
SCRUB! The first attempt at launching Gravity Probe B has been called off. Upper level winds had been a constraint for much of the morning, yet had come within acceptable parameters in time to come out of the scheduled T-minus 4 minute hold. But with about 3 minutes remaining in the countdown, Boeing engineers found they had insufficient time to confirm that the proper flight profile for the current upper level wind conditions had been uploaded to the Delta’s RIFCA. Thus, Boeing manager Rich Murphy called a hold, resulting in a one-day turnaround. The next attempt will be Tuesday, 20 April.