This week we ran the spacecraft as if it were in orbit. We used a computer call the dynamic simulator to simulate attitude control sensor inputs. The dynamic simulator uses mathematical models of the spacecraft and environment combined with inputs from the spacecraft's torquer bars and reaction wheels to change the inputs to the sensors. The spacecraft software doesn't know the spacecraft is sitting on the ground. In fact, to the operators in the control center, the spacecraft also looks like it is in orbit. The ground system got a very good work-out.
Also this week, we completed the +x array and performed the flash test to check its power output. It looks fine.
Today we removed the transponder to test it for a problem which was noticed on the TRACE transponder at the launch site.
The left photo shows the spacecraft with the +x array installed.
The array was later removed so it could go for environmental testing.
The instrument mass simulator is in place in preparation for vibration
testing.
The right photo shows Bruce making a blanket template for the
spacecraft battery.
Next week we will move the spacecraft to building 7 and begin ACS comprehensive testing.
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
January 9, 1998
January 16, 1998
January 23, 1998
January 30, 1998