Week beginning 7th June 2008
As of 4th June 012:46 UT (EIT 195) there are essentially no ARs on the disc. Overall activity remains below GOES A. STEREO B shows N- and S-polar CHs and there are also on-disc holes. The weekly EIS summary starts Saturday but there are discussions underway to better align the start with the mission planning process and the CO cycle.
- 0_a. Run SYNOP005_A at Sun-centre during each XRT SYNOP
- 0_b. Run SYNOP006 weekly if possible but still useful at longer intervals
- 0_c. Run SYNOP006 on 9th June (11:00 UT to 14:30 UT) to participate in SOHO/STEREO Intercalibration programme
1. Polar Coronal Hole Observation – Harra, Gabriel
- - EIS should be pointed to include the boundary of the coronal hole and the limb
- - Obtain velocity maps of million degree plasma
- - request Ca II from SOT and the normal polar dynamics study from XRT
- - 1" slit scan, FOV 140"x256", 45sec exp time; DPCM for line profile precision
- - run JS_CH_140x256p; data volume: 77295 kBits, run time: 1h55m13s
- - Note 1: run regcal 071 and regcal 072 before running this study
- - Note 2: ideally this study should run e.g. 2 or 3 times consecutively
- - please inform proposers in advance when study run is planned; SOHO co-ordination necessary (lkh@mssl.ucl.ac.uk, alan.gabriel@ias.u-psud.fr)
2. Quiet sun dynamics study - Muglach
- - run studies in the order: three times (a) - n times (b) - three times (a)
- - a) Study: quiet_sun_slot (#210); 40x512 slot image as context
- - three images should be taken before and after program b)
- - b) Study: qs-dynamics-small (#245)
- - run in areas of quiet Sun, plage and moderately active regions e.g AR 10993
- - slit should at least be partially on the disk
- - avoid large, well developed ARs and coronal holes
- - study observes small-scale short-term variation of QS structures in cool EIS lines.
- - repeat n times to fit into available data volume; at least for 30 min
- - EXPOSURE: 20s, RASTER: Scanning, 4 steps, SLIT: 2", STEP: 2" FOV: 10"x464"
- - if n = 15 for (b), data volume is 110 Mbits; run (b) longer if volume available
Co-observing: - SOT:
- 1). magnetograms in either Fe I or Na I, in 60s cadence (or less if telemetry allows). SOT should start its observations at least 15 min before EIS and continue at least another 15 min after end of EIS observing.
- 2). SP scans of the target regions valuable additions but lower priority than 1.
- 3).BFI images in G-Band can be added; lower priority than 1 and 2.
- - XRT: filtergrams in the thinnest filter(s)
3. QS Brightenings – Bewsher (d.bewsher@rl.ac.uk), Young (p.r.young@rl.ac.uk)
- - EIS to point at quiet Sun region near disk centre
- - run following studies:
- - PRY_slot_context_v2 (dur: 3min; vol: 3 Mbit) once at start of observation
- - tr_bright_lo (dur: 6min; vol: 1.5 Mbit) repeatedly to fill available time slot
- - PRY_slot_context_v2 again, once at end of observation
- - run tr_bright_lo for minimum of 4h; longer if possible
- - request SOT and XRT to observe EIS FoV: 20" x 144"
4. Coronal Hole Density Measurement – Young
- - polar or equatorial CH
- - select pointing based on EIT 195 images; choose darkest part of CH
- - accurate warm pixel removal essential for CH data
- - run REGCAL071 and REGCAL072 on the same day; also context study
- - study sequence is:
REGCAL072
PRY_slot_context_v2
PRY_CH_density
- - Note 1: repeat PRY_slot_context_v2 to fill the available time slot; vol: 20 Mbit; data rate: 5.2 kbps
- - Note 2: for large dark CH areas, stitch two or more repeats of PRY_CH_density
5. Test of QS study for later limb-to-limb observation - Feldman
- - spectral atlas for future tracking of QS region as it crosses disc
- - test before commitment to full observation
- - QS or CH target preferred but could be run on weak AR
- - run FELDMAN_QSCH_ATLASv1; Study ID # 272
- - data volume: 140 Mbits; Slit: 2\u201d; Step: 2\u201d; Positions: 30; Exposure: 120s
Week beginning 7th June and beyond
- - continue with variants of the above programme
- - prepare for data compression test studies
- - prepare for grating focus tests
5. Loop morphology and oscillations - de Moortel (ineke@mcs.st-and.ac.uk), Bewsher (d.bewsher@rl.ac.uk), Young (p.r.young@rl.ac.uk)
- - relatively quiescent (non-flaring) coronal loop system either on disk or limb.
- - point to loops in the active region.
- - run PRY_footpoints_lite (dur: 28min; vol: 55 Mbit), sta_loop_slot_lo (dur: 39min; vol: 22 Mbit).
- - study sequence is:
sta_loop_slot_lo at the same pointing
repeat sta_loop_slot_lo to fill available time slot.
- - run on East limb AR; advise schedule to de Moortel
