ACE Weekly Report: 04-18-01 All ACE spacecraft subsystems are performing nominally. An attitude maneuver was performed on 04-16-01. The next attitude maneuver is scheduled for 04-20-01. Maneuver Start Time=16:34:26 Maneuver End Time=16:41:29 Pre-Maneuver HGA = -3.477 deg. Sun Angle = 7.3667 deg. Post-Maneuver HGA = 4.5 deg. Sun Angle = 7.788 deg. Current S/C range: 1422714.433 km OCR ULEIS-040 was executed on 4-18-01 to return the ULEIS shutter to the 100% position. The shutter had been closed to the 6% position on 04-11-01 to avoid saturation during the recent solar flare. SSR A's 30 telemetry sections were scrolled through on 04-18-01 to verify the number of SBEs and DBEs. No DBEs or new SBEs were detected; 15 SBEs were originally detected in December 1999. SSR B's telemetry will be scrolled through on 04-19-01. ================================================ Jacqueline Maldonado Snell Honeywell Technology Solutions Incorporated (HTSI) Goddard Space Flight Center Bldg. 3 Rm N135C, Code 428.2 Greenbelt, MD 20771 Phone: (301) 286-7072 Fax: (301) 286-0218 E-mail: Jacqueline.Snell.1@gsfc.nasa.gov