Chandra Status Report
June 24, 1999

George H. Diller
Kennedy Space Center, Fla.

The Chandra X-ray Observatory with the attached Inertial Upper Stage booster arrived at launch pad 39-B this morning at 3:50 a.m. It left the Vertical Processing Facility last night at 12:30 a.m. inside the payload canister riding atop the payload transporter. It is now being removed from the payload canister and installed inside the payload changeout room at the pad.

The installation of the Chandra/IUS combination into Columbia's payload bay is currently scheduled to occur on Sunday, June 27 and will be followed the next day with the electrical connections. On June 30, the interface verification test (IVT) is scheduled to be performed. This will verify the electrical connections and the ability of the astronauts to command the payload from Columbia's flight deck.

An end-to-end test will follow on July 2. This will verify the communications path to Chandra, commanding it as if it were in space aboard Columbia. Participating are Chandra's Operations Control Center located in Cambridge, MA, Mission Control at the Johnson Space Center in Houston, the IUS control facility at Sunnyvale, CA and the communications assets of both the Deep Space Network and the Tracking and Data Relay Satellite (TDRS) system.

The remaining milestone activity primarily involves the IUS and includes a flight readiness test on July 5, the installation of batteries for flight on July 7-8, and an IUS standalone countdown simulation on July 9.

Columbia's payload bay doors are to be closed for flight on July 17 based on the current Chandra/IUS-27 processing schedule which targets a launch on July 20.

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