yee@trident.arc.nasa.gov (Peter E. Yee) (02/25/89)
KSC Weekly Payload Status Report
February 24, 1989
George Diller
TDRS-D/IUS-9 (Discovery/STS-29)
The Interface Verification Test (IVT) and the End-to-End
(ETE) test of the integrated payload were both completed last
week ahead of their respective timelines and without significant
problems.
On Thursday, Feb. 23, the Inertial Upper Stage (IUS)
software was installed aboard the pair of general purpose
computers. Also, the azimuth alignment was performed on the
Redundant Inertial Measurement Unit (RIMU), part of the IUS
guidance system. IUS Flight Readiness Checks began Thursday
night and are continuing today.
IUS battery installation is scheduled for Monday, Feb. 27.
TDRS-D batteries, which are already installed, are scheduled for
activation on Wednesday, Mar. 1. The IUS Simulated Countdown is
scheduled for next Thursday, Mar. 2.
Magellan/IUS-18 (Atlantis/STS-30)
Magellan state-of-health checks were sucessfully performed
on second shift Friday, Feb. 17, after the IUS mechanical mating
operations were completed. Some additional testing was performed
on the IUS on Saturday, Feb. 18. Electrical connections were
established on Monday, Feb. 20 to support Magellan and IUS signal
analysis testing on Tuesday, Feb. 21.
The parabolic High Gain Antenna was installed atop the
spacecraft this morning.
The IUS/Magellan Interface Verification Test (IVT) will
start on Sunday or Monday, beginning one full week of integrated
testing. The IVT is scheduled to run between 40 and 48
consecutive hours. Following will be the Mission Sequence Test,
which includes a simulated deployment of the payload and an IUS
simulated flight. The final test is the end-to-end test which is
an exercise involving the Magellan ground control stations and
the Deep Space Network.
Delta/COBE
The second stage retro package modification, which will back
the stage away from COBE after spacecraft separation, has been
completed. The first stage was powered up on Tuesday, February
21. Telemetry system calibrations for the first and second stage
are expected to start late this week. The Simulated Flight test
is forecast to occur in early March.