
Mission Briefing

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Mission preview - Our in-depth story previewing this launch of the first Delta 4-Heavy.

Launch timeline - Chart with times and descriptions of events to occur during the launch.

Launch Hazard Area - Map showing the restricted area around Cape Canaveral during launch.

Delta 4-Heavy - Overview of this heavy-lift rocket in the Delta 4 family.

DemoSat - Description of the satellite simulator and two nanosats being flown on this launch.

Pre-launch flow - Illustration of the rocket checkout and assembly at Cape facilities.

D4-H archive - Collection of past stories and pictures of the Delta 4-Heavy.

Delta directory - See our coverage of previous Delta rocket flights.


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Launch weather forecast
Posted: December 18, 2004
| Forecast for Tuesday, December 21 |
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Issued: Saturday, December 18
Launch Weather Officer: Kathy Winters, 45th Weather Squadron
Synoptic Discussion: "A cold front will move through the area Sunday bringing Arctic air into Central Florida. Freezing temperatures will occur in Central Florida for both Monday and Tuesday mornings, but temperatures will begin to moderate by Tuesday afternoon. Strong winds will follow the front on Monday, but high pressure will set into Florida Tuesday allowing for winds to subside. A slight concern remains for a violation of ground winds."
Clouds: Scattered at 4,000 feet with 3/8ths sky coverage and tops at 6,000 feet
Visibility: 10 miles
Launch Pad Winds: East-northeasterly from 070 degrees at 8 gusting to 12 knots
Temperature: 63 degrees F
Relative Humidity: 60 percent
Weather: Partly cloudy
Probability of Violating Weather Constraints: 10 percent
Concerns: Ground wind
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Tuesday's launch window: 2:36 to 5:31 p.m. EST (1932-2231 GMT)
Tuesday's sunset: 5:31 p.m. EST (2231 GMT)
Wednesday's launch window: 2:36 to 5:32 p.m. EST (1932-2232 GMT)
Wednesday's sunset: 5:32 p.m. EST (2232 GMT)
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| 24- and 48-hour Delay Forecasts |
Wednesday's Probability of Violating Constraints: 30 percent
Concerns: Ground wind, flight through precipitation and cumulus cloud rules
Thursday's Probability of Violating Constraints: N/A
Concerns: N/A
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