Joint planning session

1
Joint planning session

• Preliminary instrument operation science plans
  of SOT/XRT/EIS for several months after the
  launch.
• Instrument checkout and Performance verification
  periods
• There are some items to be coordinated among the
  plans
• The goal is to develop a baseline operation plan
  as the whole satellite in these periods.
• Identify any conflicts among the three
  telescopes.
• Define action items for further iteration before
  the launch.

2
Coordination of the 3 telescopes

• Primary coordination items
• Usage of data recorder
• Satellite pointing (Selection of field of view
  for the telescopes)
• Priority of commanding during USC Contacts
• Initial science observing phase (Y2months
  )
• Scientific coordination
• - How to start to coordinate 3 telescopes
  for dedicated scientific purposes
• priority of scientific purposes
• joint observations
• - How to start to collaborate with other
  missions and observatories?

3
Until aperture door openings (1)

• Spacecraft verification and checkout phase
• Y7 Y20 (TBR)
• Initial power on of telescopes (FPP, EIS) for
  de-contamination heater operations
• Instrument checkout phase (1)
• Y21 Y27 (TBD)
• Between OTA side door and OTA top door
• Power up full telescope systems (FPP/CTM, XRT,
  EIS) for instrument function checkouts

4
Until aperture door openings (2)

• Coordination needed
• Usage of USC contacts for commanding
• Operation planning for these periods
• Katsukawa generated a draft plan for entire SOT
  activities
• Kano generated a draft plan for XRT activities
• Hara generated a draft plan for EIS activities
• They have estimated the duration of each activity
  and identified possible commanding activities
  for each of USC contacts
• Categorizing USC contacts into two purposes
• Dedicated mainly for SOT activities
• Dedicated mainly for XRT activities
• Most of EIS commanding at each contact has very
  limited number of commands. Thus, EIS commanding
  is included in the above passes

USC4
USC3
USC1
USC2
XRT
XRT
E
E
SOT
SOT
E
5
After aperture door openings (1)
Note Periods given below are only for SOT

• Instrument checkout phase (2)
• Y28 Y45 days (TBD)
• First light, Check optical performances, Start
  image stabilizer, Start in-flight calibration
• Data for in-flight calibration should be used for
  scientific purposes
• Performance verification phase
• Y46 days Y2 months (TBD)
• Run combination of all the observables. The data
  is used for confirming performance and
  calibrating the observables also available for
  scientific purposes.

6
After aperture door openings (2)

• Initial science phase for core team
• Y2 Y6 months (maximum)
• (Use standard (baseline) observing sequences, if
  no specific scientific targets exist.)
• Run more complicated sequences for dedicated
  scientific purposes in several periods.
• Start to have joint coordination of the 3
  telescopes
• Need to discuss what kind of joint observations
  (science priorities) among SOT/XRT/EIS will be
  planned.
• The coordination efforts develop the operation
  method. Training for the regular science phase.

7
Telescope Initial Schedule Summary
Pointing (proposed by SOT)
SOT
XRT
EIS
(rough time)
Side-door
note
Y21d
Inst. Checkout(1)
Inst. Checkout
Engineering
Fixed at Disk center
Top-door
Y28d
Top-door
Clam-shell
note
Engineering
Y35d
Track an AR (near disk center)
Inst. Checkout(2) first light phase
Inst. Checkout Performance Verification
Calibration
Y40d
Limbs
Y42d
Y45d
Performance Verification (run simple, then more
complicated sequence)
Y50d
Any regions (follows the following page chart)
Initial science 90days plan
Initial observations (start from simple)
Y60d
Initial science phase
8
Tracking priorities

• Targeting priorities
• Track any active region on the disk
• When no AR on disk
• Disk center QS studies
• Irradiance scans
• Prominence limb scans
• Targets of Opportunity
• Flaring regions
• Active filaments

AR on Sun?
No
Yes
Disk Center QS Programs
AR Tracking Programs
Irradiance Scans
Prominence/Polar Scans
Enough AR Data?
Yes
No
9
Attitude Control System Preparation(from
viewpoint of telescope operation)

• AOCS pointing
• Pointing at a fixed position
• Tracking a region according to solar rotation
• Functional verification before opening OTA top
  door
• Fixed pointing to tracking pointing
• Tracking performance using UFSS output
• Pointing changes to 4 extreme positions (i.e.,
  limbs)
• After opening OTA top door
• Parameter change according to SOT-UFSS
  misalignment
• Tracking performance using SOT data
• Satellite pointing mainly driven by SOT because
  of its narrow FOV
• Some requests from XRT and EIS

10
Usage of data recorder

• Usage of data recorder
• Nominal allocation SOTXRTEIS 701515
• If this allocation needs to be changed for some
  specific purposes, each team needs to propose in
  operation meetings.
• Svalbard downlinks
• Technical and support details under arrangement
• Compatibility test is needed before starting
  nominal operation
• Rough plan (under negotiation)
• Svalbard station attempt to receive X-band
  telemetry from ASTRO-F (Akari) satellite, whose
  CDH system is identical to the Solar-B system.
• Perform test downlinks at early phase (before OTA
  top door opening) to confirm that the data is
  correctly downlinked at Svalbard. The same data
  should be downlinked at USC.
• Then start to have regular downlink supports.
• Our desire is normal downlink supports from
  roughly Y40 days
• Data downlinked at USC are available very soon.
  But a few days delay may be expected for Svalbard
  data.

11
Micro-vibration in flight

• Check whether SOT image performance is influenced
  by micro-vibrations in flight as soon as
  possible.
• Monitor and evaluate CT signals, when telescope
  mechanisms, especially XRT VLS and EIS coarse
  mirror, are in motion.
• Determine the cadence of VLS exposures in
  instrument checkout period.
• This is extremely important for image
  co-alignment.

12
Mercury transit in instrument checkout or PV
phase (2006 Nov 9)
Check item - Alignment between SOT, XRT, EIS,
and ground-based observations - Point spread
function - Scattered light Scientific
objective A proposal from planetary
scientists Diagnosis of Mercurys
atmosphere (NaD for
SOT, HeII for EIS) Need to prepare the plan,
although there is possibility not to observe
Mercury transit.
13
Initial Science Observations(from roughly Y2
months after launch)

• This is for initial scientific observations.
  Start joint observations among SOT/XRT/EIS.
• Also the period for establishing our operational
  scheme for coming regular observation period.
• Start operation meetings
• Science schedule coordinators
• Proposal observations

14
Initial Science Observations(from roughly Y2
months after launch)

• Science priorities
• Joint observations
• Collaboration with other missions and
  observatories

15
XRT Science Priorities (from Ed DeLuca)
All plans and observations will be conducted
jointly with EIS SOT Synoptic program is
currently undefined
16
Initial Science Observations(from roughly Y2
months after launch)

• Collaboration with other missions and
  observatories
• Start to observe the same target
• Target information inputs from Solar-B?
• Eg. Yohkoh SXT La Palma Swedish Telescope LMSAL
  collaboration
• 1992 May July, only half year after the
  Yohkoh launch
• Good target coverage
• More coordinated observations?
• Scheme on determination of observing region
• Preliminary target determined in Solar-B weekly
  meeting, final target determined in Solar-B daily
  meeting
• Coordination with TRACE?
• Information from other observatories,
• Latest images
• Occurrence of emerging flux