ACE Weekly 06/04/04 - 06/10/04 All ACE spacecraft subsystems are performing nominally. Attitude and spin control maneuvers were executed successfully on 06/10/04. The next attitude maneuver is scheduled for 06/25/04. ============================================================================ Orbit Events: The ACE transit of the old Solar Exclusion Zone (SEZ) will continue through 06/14/04. For the first time ever, ACE transited the solar disk on 06/01/04. On that date, the Sun's angular radius was 0.2629 degrees (as seen from Earth's center). The solar transit lasted nearly 21 hours (again, as seen from Earth's center). The main features of this transit are given in the following table (times are UTC). 5/19 01:42 4.75 deg inbound 5/27 07:45 2.0 deg inbound 5/30 23:39 0.63 deg inbound 6/01 01:18 0.2629 deg (kissing solar disk inbound) 6/01 10:46 0.197 deg (radius of closest approach to solar center) 6/01 22:14 0.2629 deg (kissing solar disk outbound) 6/02 23:28 0.63 deg outbound 6/06 11:15 2.0 deg outbound 6/14 07:18 4.75 deg outbound The 0.63 deg epochs are included because that radius represents the closest approach during our last transit in February/March. ACE will spend almost exactly 3 days within this zone. ===================================================================== OCRs Executed: NONE ===================================================================== Ongoing Activities: TAPS: - Transition from GTAS to TAPS occurred on 03/18/04. All trending activities are being accomplished using TAPS. - Installation of TAPS release 4.3 is tentatively scheduled for the first week of July 2004. All open DRs will be fixed in this release. ---------------------------------------------------------------------------- Automation (ROBOTT): - Release 0.6 was installed on String 1 on 05/13/04. -- Release 0.6 will not be used operationally, however testing is ongoing. - Release 0.7 is on-schedule for a 06/17/04 release to String 3. - SUG development is ongoing. A DRAFT version has been delivered and is still being reviewed by the FOT. Comments will be provided to the developer. - FOT training on ROBOTT began 05/05/04 and additional sessions are being developed. ============================================================================ Extra Spacecraft Activities: NONE ===================================================================== Anomalies: DOY 04157 (06/04/04) ACE Anomaly G04-0048 - DPS Product Generation Error DPS Products (src2 & src3) generated errors. FOT in response created No_Repeat product specs for DOY 157 products. IMPACT: None. DOY 04160 (06/08/04) ACE Anomaly G04-0049 - DPS/Oracle Problems After Tape Recovery Oracle/DPS still not functioning properly after database recovery (string2), see AR# G04-0046. Receiving DPS message (Note, the RM task deals with releasing Sessions and Products.) IMPACT: None, this is the backup string. TT# 2004060001 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Glen A. Miller ACE Flight Operations Observatory Engineer Honeywell Technology Solutions Inc. Goddard Space Flight Center Building 14, Room W10A Mail Stop 428.2 Greenbelt, MD 20771 Office: 301-286-7071 Pager: 800-425-3174 Fax: 301-286-1729 gamiller@pop500.gsfc.nasa.gov ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~