STEREO Weekly Meeting Minutes for 2025-05-06 (Week 19)

ANNOUNCEMENTS
-------------

* None 

INSTRUMENT and SPACECRAFT STATUS
--------------------------------

* Ahead is operating nominally.  PLASTIC is in operational mode,
  but with a moderately higher than normal background rate.

* Four years after the initial loss of communications anomaly with
  the Behind observatory, NASA has directed to cease periodic
  recovery operations with the last support on October 17, 2018.
 

DISCUSSION AND OPERATIONS CONSTRAINTS
-------------------------------------

Week 18 (Apr 28 - May 4)

* On day 119 (Apr 29), during the DSS-35 support, turbo decoder lock was lost
  briefly at 1755z.  This anomaly resulted in the loss of 12 frames of SSR
  data.  The MOPs team repositioned the SSR pointers during the support and
  recovered all the affected data.

* As of day 124 (May 4), all PLASTIC systems are behaving well, except there is
  a moderate background count rate, which the team is continuing to monitor.

* The average daily science data return for Ahead was 8.3 Gbits during this
  week.

Week 19 (May 5-11)

* Ahead has fourteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.  A track on Tuesday, May 6, was removed from the
  schedule.

* The 176th momentum dump is scheduled for tomorrow, May 7th, at 13:00 UT.

Week 20 (May 12-18)

* Ahead has thirteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.

* The DSN network maintenance event originally scheduled for Wednesday, May 14, 
  has been canceled.

Week 21 (May 19-25)

* Ahead has fourteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.

Week 22 (May 26 - June 1)

* Ahead has fourteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.

* APL will be closed on Monday, May 26, for the Memorial Day holiday.

* An ESA Malargue track is scheduled for Wednesday, May 28.

Week 23 (June 2-8)

* Ahead has fifteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.

* The 75th SECCHI stepped calibration roll is scheduled for Tuesday, June 3rd,
  at 14:50 UT.

Week 24 (June 9-15)

* Ahead has fifteen passes during the week, all at 720 kbps, and overall
  coverage is nominal.

* The 18th battery discharge cycle is scheduled for Wednesday, June 11,
  starting at 17:40 UT.

* APL will be undergoing power maintenance starting Friday, June 13, at
  19:00 UT, and continuing until Monday, June 16 at 12:00 UT.  The MOC
  shouldn't be impacted.

* Parker Solar Probe will be starting their perihelion pass on Sunday, June 15.

Other



COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 19:

M May 05 (125)
T May 06 (126)
W May 07 (127)  Ahead: Momentum dump, 13:00 UT
T May 08 (128)
F May 09 (129)
S May 10 (130)
S May 11 (131)

-------------------------------------------------------------------------------
Scheduled activities for Week 20:

M May 12 (132)
T May 13 (133)
W May 14 (134)
T May 15 (135)
F May 16 (136)
S May 17 (137)
S May 18 (138)

-------------------------------------------------------------------------------
Scheduled activities for Week 21:

M May 19 (139)
T May 20 (140)
W May 21 (141)
T May 22 (142)
F May 23 (143)
S May 24 (144)
S May 25 (145)

-------------------------------------------------------------------------------
Scheduled activities for Week 22:

M May 26 (146)	Memorial Day holiday
T May 27 (147)
W May 28 (148)
T May 29 (149)
F May 30 (150)
S May 31 (151)
S Jun 01 (152)

-------------------------------------------------------------------------------
Scheduled activities for Week 23:

M Jun 02 (153)
T Jun 03 (154)	Ahead: SECCHI stepped calibration roll, 14:50 UT
W Jun 04 (155)
T Jun 05 (156)
F Jun 06 (157)
S Jun 07 (158)
S Jun 08 (159)

-------------------------------------------------------------------------------
Scheduled activities for Week 24:

M Jun 09 (160)  
T Jun 10 (161)  
W Jun 11 (162)	Ahead: Battery discharge cycle, 17:40 UT  
T Jun 12 (163)  
F Jun 13 (164)  
S Jun 14 (165)  
S Jun 15 (166)  Parker Solar Probe perihelion pass, June 15-24

-------------------------------------------------------------------------------



Upcoming events:

2025:

* Jun 15-24		Parker Solar Probe perihelion pass
* Sep 7-12              Solar Orbiter Remote Sensing Window 22
* Sep 13-23             Solar Orbiter Remote Sensing Window 23
* Sep 12-20             Parker Solar Probe perihelion pass
* Oct 1-6               Solar Orbiter Remote Sensing Window 24
* Dec 9-17              Parker Solar Probe perihelion pass

2026:

* Mar 8-16              Parker Solar Probe perihelion pass
* Jun 4-12              Parker Solar Probe perihelion pass
* Sep 1-9               Parker Solar Probe perihelion pass
* Nov 28-Dec 6          Parker Solar Probe perihelion pass
* Dec 24                Solar Orbiter Venus flyby

2028:

* Mar 18		Solar Orbiter Venus flyby

2029:

* Jun 10		Solar Orbiter Venus flyby
* Jun 30		Ahead: Mercury transit

2030:

* Sep 3			Solar Orbiter Venus flyby