We performed ACS testing, blanket measurements, and harness cleanup this week.
Here is the engineering test unit structure with the thermal model
of the cryostat shell on top. The flight spacecraft will look very
much like this. The left photo shows the -y view, with the star
tracker mass model, including shade, clearly visible. The right photo
shows the sun-side of the ETU solar arrays. Delron squares have been
mounted to the panels to simulate the mass of the solar cells.
This is the flight spacecraft during the gyro phasing test. It is
mounted on top of the turn-over fixture so that it can be rotated.
The gyro rates, including direction, are read out while the spacecraft
rotates. The gyros are sensitive enough to measure the rotation rate
of the earth (360 degrees in 86,400 seconds).
We will integrate the flight WIE and pyro box next week.
Previous updates:
August 18, 1997
October 20, 1997
October 31, 1997
November 7, 1997
November 14, 1997
November 21, 1997
December 5, 1997
December 23, 1997