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Joint planning session

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The goal is to develop a baseline operation plan as the whole ... according to solar rotation ... attempt to receive X-band telemetry from ASTRO-F (Akari) ... – PowerPoint PPT presentation

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Title: 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
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