02 02 07

George H Diller Kennedy Space Center, Fla 321-867-2468

STATUS REPORT: ELV-020207

EXPENDABLE LAUNCH VEHICLE STATUS REPORT

Mission: THEMIS (Time History of Events and Macroscale Interactions During Substorms) Launch Pad: 17-B, Cape Canaveral Air Force Station Launch Vehicle: Boeing/United Launch Alliance Delta II Launch Date: Feb 15, 2007 Launch Time: 6:08 - 6:27 p m EST

At the Astrotech payload processing facility near Kennedy Space Center, transportation of THEMIS to Pad 17-B was rescheduled from today until early Saturday morning This was due to high wind and rain associated with an advancing cold front This will not affect the Feb 15 launch date THEMIS will be mated to the Delta II rocket and state-of-health checks will be performed Earlier this week, engineers and technicians mated THEMIS to the upper stage booster as planned on Monday

At Launch Complex 17 on Monday, a "LOX leak check" was performed by loading liquid oxygen aboard the Delta II first stage during a simulated countdown The next day, a Simulated Flight Test was performed, activating the vehicle's post-liftoff flight systems without fuel aboard The electrical and mechanical systems of the entire Delta II were exercised during that test Once the THEMIS payload is attached to the third stage of the launch vehicle, a final major test, the Flight Program Verification will be conducted on Feb 6 This is an integrated test of the Delta II and THEMIS working together This test will simulate all events as they will occur on launch day, but without propellants aboard the launch vehicle

Previous status reports are available on the Web at:

http://www nasa gov/centers/kennedy/launchingrockets/status/2007

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