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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.
15-Apr-04 | Next launch
The next Delta launch will be Gravity Probe B, an intriguing Einsteinian relativity experiment. The spacecraft has been installed atop its two-stage Delta II at Vandenberg’s SLC-2W, and is ready to go on Monday, 19 April. (This is a two-day delay from its previous schedule.) Each launch opportunity is an instantaneous window, so any unexpected hold in the countdown will require a turnaround of at least 23 hours and 56 minutes. Upcoming windows are:
- Monday, 19 April 2004, 17:01 UTC (10:01 PDT)
Tuesday, 20 April 2004, 16:57 UTC (09:57 PDT)
Thursday, 22 April 2004, 16:49 UTC (09:49 PDT)
Friday, 23 April 2004, 16:45 UTC (09:45 PDT)
The two-day stand down in the middle of the week would be necessary to replenish the spacecraft’s Dewar tank with cryogenic helium, which is needed to keep GP-B’s highly sensitive gyroscopes cool.