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Launch Coverage

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Virtual Launch Control Center - CALIPSO/CloudSat
The Virtual Launch Control Center was activated at 4:00 a.m. EDT

The Virtual Launch Control Center was deactivated at 4:27 a.m. EDT

                                                   + View All Launch Videos

                                                   + View First Launch Attempt - April 21, 2006

                                                   + View Second Launch Attempt - April 25, 2006

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NASA TV Commentator Bruce Buckingham announces the launch attempt is scrubbed for the day.
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4:24 a.m. - We are scrubbing the launch for today due to weather issues.

4:21 a.m. - An updated weather briefing has been given to the launch team and we are still looking at a 20% chance of launch. Cryo tanking has been delayed, but there is extra time built into the schedule so this is not currently an issue for launch.

4:12 a.m. - T-80 minutes and counting. The road block to the launch area is in place and the flight hazard area is secured.

The launch team is polled to begin "cryo tanking."
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4:06 a.m. - NASA Launch Manager Chuck Dovale has conducted a poll of the NASA team on readiness to begin loading supercold liquid propellants into the rocket, a process known as "cryo tanking." The team is go as long as the current issues being considered are cleared.

NASA TV Commentator Bruce Buckingham introduces coverage of today's launch attempt of CALIPSO and CloudSat.
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3:57 a.m. - At T-95 minutes, the launch weather officer has briefed the Delta II team on today's forecast. Extensive low level clouds will be moving into the launch area in the next few hours, which triggers "red," no-go conditions for clouds. Light rain showers have been developing across the area and moving toward the west. We currently have no weather warnings, watches or advisories at this time and winds have remained fairly light. Visibility is forecasted to be five miles with air temperatures in the lower 50s. We are currently red for thick clouds, but green on all other constraints. Our probability for violation of weather criteria is 80%, primarily for thick clouds. Should we go into a 24-hour scrub, weather improves to only a 20% chance of weather violation.

**** The previous events took place before the start of live coverage. ****

3:52 a.m. - We are at T-100 minutes into the countdown. A weather briefing will be given in five minutes. The rocket's tracking beacon and engine heaters are on.

3:24 a.m. - Pressurization of the rocket's first stage nitrogen and helium tanks is now finished.

3:02 a.m. - Today's countdown began at the end of the T-150 minute planned hold. Space Launch Complex 2 has been cleared of workers and a warning horn has been sounded as a precaution for any remaining personnel. This alert comes at the start of the pressurization of the helium and nitrogen storage tanks inside the rocket's first and second stages.

Yesterday, the rocket was preloaded with 10,000 gallons of RP-1 kerosene propellants. Kerosene is usually loaded on launch day, but engineers elected to do it a day early for this mission.

Virtual Launch Control Center Team
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Lynda Warnock (InDyne, Inc.)
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Charlie Plain (InDyne, Inc.)
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Mike Chambers, Chris Chamberland and
Chris Rhodes (InDyne, Inc.)
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Dennis Armstrong and Jeanne Ryba (NASA)