Chandra Status Report
April 6, 1999

George H. Diller
Kennedy Space Center, Fla.

In the Vertical Processing Facility (VPF) at KSC, work continues on schedule toward the launch on July 9 of the Chandra X-ray telescope aboard Space Shuttle Columbia on mission STS-93.

The solar arrays were installed on March 26 and testing of the mechanical and electrical interfaces was successfully finished on April 1. Their high performance could be noticed when during the deployment test of one of the arrays a small amount of power was already being generated with only the available lighting of the VPF.

On April 2, Chandra was hoisted from its test stand onto a fueling stand. Preparations for fueling are now underway. Loading of the nitrogen tetroxide oxidizer into the spacecraft is currently planned to occur on April 9. Then the bi-propellant hydrazine, used by the telescope's propulsion system to achieve final orbit, will be loaded aboard April 13. Hydrazine, used by a subsystem that contributes to pointing the telescope, will be loaded April 15.

Finally, the spacecraft's batteries will be installed. Chandra will then be ready for the arrival at the VPF of the Inertial Upper Stage Booster on April 19 as scheduled.

Chandra arrived at KSC's Shuttle Landing Facility aboard an Air Force C-5 airplane on Feb. 4.

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