Mission Status Report #3 Star Date: June 26, 1999
Photos: FUSE launch photos, courtesy of NASA. (Click photos to see larger version.)
FUSE CHECKOUT CONTINUES SMOOTHLY
Date: Fri, 25 Jun 1999 17:48:09 -0400 (EDT) From: Bill Oegerle Subject: FUSE IOC, day 2 FUSE IOC (in-orbit checkout), day 2 All spacecraft subsystems continue to work as planned. The attitude solution from the magnetometers has converged, and the drift rate appears to very low -- however, this won't be confirmed until we can take some pictures with the FES. The Coarse Sun Sensor "follow" test was executed today, in which the attitude of the spacecraft was controlled by the coarse sun sensors. This went very well. The spacecraft was also succesfully commanded into safe-pointing mode. Over the next few hours, plans are being made to transition into "inertial science mode", where the gyros control the attitude (from filtered magnetometer data). The orbit is still not well determined, but the latest indications are that the eccentricity is somewhat higher than expected (e=0.0011). This would imply a 14 km difference between perigee and apogee. Even if this holds up, it should not have any adverse effect on the mission. Current plans are to turn on the instrument flight computer (IDS) this Sunday, and begin turning on the instrument heaters. --Bill Oegerle, Science Ops Lead
Date: Sat, 26 Jun 1999 10:03:53 -0400
From: JB Joyce
Subject: FUSE Status Report-June 26,1999
Please be advised of the latest FUSE status:
Accomplishments:
0 Control modes verified:
- Coarse Sun Sensor Follow
- Safe Pointing
- Inertial Science
- Inertial Hold
0 Solar Arrays moved to the 60 degree position
0 Clock Correlation and adjustment implemented
0 All primary spacecraft subsystems continue to function nominally
0 FUSE Satellite Control Systems continues to operate nominally.
Planned Activities for June 26,1999
0 Coarse Sun Sensor Calibration
- 7 Slews
0 Instrument Data System (IDS) Turn on
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* *
* J.B.Joyce *
* FUSE Mission Operations Manager *
* *
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Reported by: Bill Oegerle, Science Ops Lead, and J. B. Joyce, Mission Operations Manager
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