SOHO Daily Meeting Minutes for Wednesday, 07 February 2001
ANNOUNCEMENTS
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* Science Club today, 3:30 pm in the EAF. Refreshments provided.
SPEAKER: Alphonse Sterling (MSFC)
TOPIC: Homologous Solar Flares with EIT Crinkles: Evidence
for the Breakout Model?
* Offpoint timeline at http://soho.nascom.nasa.gov/soc/timeline_feb.html
A current copy is included at the end of this message.
FOT REPORT
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Spacecraft Status: Nominal
Spacecraft Anomalies: None
Accomplished Activities: RSL, New Guide Star (5.8), VIRGO
Planned Activities: VIRGO
Upcoming Operations: 2/8 Offpoint Operations
Ground Anomalies:
037/1530 3 min late AOS. D27. Brake error on x-axis. TM on SSR
037/2050 32 min commanding delay. D16. Unable to lock RCVR#1 for ranging
038/1130 Transmitter Red. D66. delay of 83 min of commanding. Using
backup 2k transmitter.
038/1312 14 min Degraded TM. D66. Reason unkown. recoverable
SOLAR STATUS
------------
02/06 DOY 037 - 02/07 DOY 038
EIT daily On-Line Solar Status and observations:
http://umbra.nascom.nasa.gov/eit/plan/log_form20010207.html
LASCO daily On-Line Solar Status and observations:
http://lasco-www.nrl.navy.mil/observations/2001/obs20010207
INSTRUMENT STATUS
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CDS: Nominal. Today - Oslo active region study on AR 9334 or 9335, then
calibration observations with EIT on two active regions and one quiet
sun region. Thursday - Offpoint calibration studies - idle during the
offpoint. CDS also wants to coordinate with TRACE on a full disk
mosaic following the offpoint.
UVCS: Nominal. Today - Comet observations of SOHO-294 at 8.5 Rsun on the
DSS-27 pass, followed by coronal hole study in the South West from
1.7 to 2.4 Rsun and minisynoptic. Tomorrow - UVCS will ramp down detectors
and conduct a test of the UVCS sun sensor safing loop during the offpoint.
After SOHO returns to normal pointing the FOT enables the offpoint flags,
UVCS will return to normal operations.
LASCO: Nominal. C2 and C3 synoptics today. Tomorrow LASCO C2 and C3 doors
will be closed during the offpoint.
EIT: Nominal. 195 Angstrom CME watch and synoptics. Tomorrow will start
lamp calibrations at 10:30 UT, with synoptics and CME watch in the
gap prior to the offpoint maneuver.
MDI: Nominal. MDI began observing in high res mode at 04:30 UT today.
Will take 5 minutes of dark images just before the offpoint, then
cycle through nominal focus/full disk best focus/out-of-focus
every 3 minutes through the offpoint.
TRACE: Nominal. AR 9334 and full disk mosaics.
--------------------
FEBRUARY 8, 2001 OFFPOINTING
SCEDULE OF ACTIVITIES
Last Updated: 07-FEB-2001 at 14:30 UT
Note: times are in UT and are estimates only
THURSDAY, FEBRUARY 8
--------------------
08:40 - 12:40 DSS-66 Short Contact
16:15 AOS on DSS-24
16:15-17:10 SVM RESERVED (Start of Pass Activities)
17:10-18:10 NRT FOR INSTRUMENT PREPARATIONS
- LASCO CLOSES C2 AND C3 DOORS
- UVCS RAMPS DOWN HIGH VOLTAGES
- MDI OPENS ISS LOOP
(MDI OCD Requests at least 20 minutes of VC2 prior to
offpoint and as much as possible throughout)
18:10- ~22:10 SVM ACTIVITIES
- DISABLE OFFPOINTING FLAG TO MDI, LASCO, SUMER
AND UVCS (SUMER flag should have been disabled
previously).
- DISABLE ESR FLAG TO LASCO AND EIT ONLY
- OFFPOINTING BEGINS
For Step 1 at (0,0):
---------------------
NRT: Execute EIT exposures
Wait for go-ahead from EIT
For Steps 2 to 12:
------------------
Execute profile to offset from table below
NRT: Execute EIT exposures
Wait for go-ahead from EIT
For Step 13, at (0,30):
------------------------
Execute profile to offset from table below
ENABLE ESR flag to LASCO/EIT
NRT: Execute EIT exposures
Open LASCO doors
Wait for go-ahead from EIT
For Step 14, back at (0,0):
---------------------------
Execute profile to offset from table below
NRT: Execute EIT exposures
- AFTER MANEUVER
* ENABLE Offpointing flag to MDI, LASCO, UVCS (SUMER closed)
* CLOSE MDI's ISS Loop (after permission received from MDI)
(then, at least 15 more minutes of VC2 as requested in OCD)
~ 22:10-01:05 NRT for instrument recovery.
01:05-01:50 SVM RESERVED - STATION HANDOVER TO DSS-46 AND RANGING ACTIVITIES
01:50-02:30 NRT if needed.
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Positions (yaw, pitch) in arcseconds are given as deltas from nominal FPSS offset:
----------------------------------------------------------------------------------
step position (arcsec) dwell (min) minutes elapsed
1 (0, 0) 0
2 (-225, 0) 4 10
3 (-100, 0) 4 20
4 (0, 0) 4 30
5 (68, 0) 4 40
6 (383, 0) 4 50
7 (0, 0) 4 60
8 (0, -225) 4 70
9 (0, -100) 4 80
10 (0, 0) 4 90
11 (0, 68) 4 100
12 (0, 383) 4 110
13 (0, 30) 4 120
14 (0, 0) 4 130