ACE Weekly Report:  05-30-01

All ACE spacecraft subsystems are performing nominally.  An attitude
maneuver was successfully performed on 05-24-01.  In addition a
station keeping maneuver (SK-21) was also performed on 05-24-01.  The
next attitude maneuver is scheduled for 06-01-01.

SEPICA ramp up activities have halted since the instrument was ramped
down by its DPU on 05-27-01.  The 30kV power supply is currently at
.80784 kV.  It had been at 4.44312 kV just prior to the autonomous
ramp down.  Ramp up activities had been continuing uneventfully for
SEPICA up until the shutdown.  The Instrument team continues to
analyze telemetry and investigate this anomaly (AR S01-0005).

Several OCRs have been executed as part of the ULEIS team's on-going
investigation of the motor error anomaly.  OCR ULEIS-043 was executed
on 05-17-01, OCR ULEIS-044 on 05-21-01, OCR ULEIS-045 on 05-22-01,
OCR ULEIS-046 on 05-25-01, and OCR ULEIS-047 on 05-29-01.  The motor
error anomaly was first detected in April 2001 (AR S01-0002).

Real-time operations have been temporarily transitioned from the MOR
to the third string in Building 14.  This will allow the FOT to
complete the final phase of their TPOCC 5.1 testing.  The first
support taken on the third string was on 05-29-01.  Real-time
operations are scheduled to return to the MOR in approximately two
weeks.

================================================
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