soho joseph b. gurman us project scientist for soho nasa goddard space flight center philip h....
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SOHO
Joseph B. GurmanUS Project Scientist for SOHO
NASA Goddard Space Flight Center
Philip H. ScherrerPrincipal Investigator, MDI
Stanford University
Bernhard FleckEuropean Project Scientist for SOHO
ESA
S3C Senior Review, 2005•11•14
J.B. Gurman
Updates to proposal
•Science
•farside imaging•magnetoconvection / solar wind / coronal
heating•Great Observatory support
•Publications
•refereed•theses•notable/impact
•Public affairs
S3C Senior Review, 2005•11•14
J.B. Gurman
Science update: farside imaging –
2000•Original method field of view: farside center ± 45º
•Uses information from two “skips” each way (near to far side and back)
S3C Senior Review, 2005•11•14
J.B. Gurman
Science update: farside imaging –
2005
•Uses one skip out, 3 back plus 3 skips out, one back to add annulus from a few degrees on nearside to ~45° onto the farside, then combined with original method
•Also smooths the complex components of phase, rather than the angles
QuickTime™ and aGIF decompressor
are needed to see this picture.
● New method gives nearly complete nearside/farside maps
S3C Senior Review, 2005•11•14
J.B. Gurman
Science update: Can the “magnetic carpet”
accelerate the solar wind as well as heat the
corona?•McIntosh et al. (submitted to Science) have compared SUMER Si II (2x104 K), C IV (105 K), and Ne VII (7.5 x 105 K) intensities and Doppler shifts in quiet Sun and beneath coronal holes
•Observations interpreted as reconnection along supergranular boundaries
S3C Senior Review, 2005•11•14
J.B. Gurman
SOHO plays an integral rolein the Great
Observatory (I)•239 coordinated observations (Joint Observing
Programs, campaigns, intercalibrations) in 2003 - 2005
•140 involving spacecraft other than SOHO
•90 involving groundbased observatories
•only 73 involving only SOHO instruments
•> 2/3 of all coordinated observations involved other facilities
S3C Senior Review, 2005•11•14
J.B. Gurman
SOHO plays an integral rolein the Great
Observatory (II)•Mean number of hours per day at least one SOHO instrument is involved in a coordinated observation
Num
ber
of
hours
/day
S3C Senior Review, 2005•11•14
J.B. Gurman
Refereed publications
update
•2003 - 2005 total now exceeds 2,300
•Also over 2,300 individual authors
Calendar YearRefereed Journals Only
1996 31
1997 126
1998 174
1999 297
2000 294
2001 209
2002 287
2003 303
2004 332
2005 Jan. - Oct. 259
Total 2,312
S3C Senior Review, 2005•11•14
J.B. Gurman
Theses update
•40 Ph.D. theses in the last three years
•Geographical distribution of Ph.D. theses, 2003 - 2005: US (11), Germany and France (8 each), UK (4), Turkey (3), Spain, Switzerland (2 each), Norway, Russia (1 each)
• In addition, a B.Sc., several Masters, and two habilitations
YearNumber of
Ph.D. Theses
1996 81997 8
199818
1999 24
200010
2001 192002 5
200310
2004 14
200516
Total132
S3C Senior Review, 2005•11•14
J.B. Gurman
Notable Publications
• Moran and Davila 2004, Science, 305, 66: 3-D pB imaging of CME's
• Foukal, North, and Wigley 2004, Science, 306 (5693), 68: Limit on solar "forcing" of historical terrestrial climate
• Lallement et al. 2005, Science, 307 (5714), 1447: Interstellar "compass" from different directions of H and He flow
• Tu et al. 2005, Science, 308, 519: Origin of solar wind in coronal hole magnetic funnels
• Prangé et al. 2004, Nature, 432, 78: Tracing a CME/ICME from the Sun (2000 November 8) to Saturn (Saturnian aurorae; 2000 December 7 - 8)
• Kohl et al., 2005, A&A, in press: Review of UV spectroscopy of the extended solar corona (121 pp.)
S3C Senior Review, 2005•11•14
J.B. Gurman
Press/Web Releases (2003
Q2-Q4)• 2003 June: "Comet Survivors" (sungrazing comet tails survive after disapperance of nuclei)
• 2003 September: SOHO wins Laurel for Team Achievement award of IAA
• 2003 October 15: "Eight Years of Spectacular Solar Gazing"
• 2003 October 23: "SOHO Spots Jupiter-Sized Sunspot and Earth-Directed Flares"
• 2003 October 29: "Tuesday/Wednesday Solar Punch" (X17 flare, CME, proton, SEP event)
• 2003 October - November: NASA TV "Solar Storm" videos --- video monitoring service wanted to raise NASA's rates
• 2003 November 4: "Space Weather Gone Crazy -- Another Historic Flare"
• 2003 November 19: "Sun Sheds Skin and Flips" (polarity reversal and CME distribution)
• 2003 November 21: "SOHO tracks recent stormy regions on Sun's far side as they turn for second shot at earth"
S3C Senior Review, 2005•11•14
J.B. Gurman
Press/Web Releases (2004)
• 2004 March 15: "SOHO Spots a Prominent Prominence" (large eruptive)
• 2004 April 15: "New Comet to Make Internet Appearance" (Comet Bradfield)
• 2004 July 1: "First 3D View of Solar Eruptions" (pB CME results)
• 2004 July 22: "Sunspot Now Size of 20 Earths"
• 2004 November 10: "An Unusual Light Show" (CME and aurorae)
S3C Senior Review, 2005•11•14
J.B. Gurman
Press/Web Releases (2005)
• 2005 April 24: "Join in the Search for SOHO's 1,000th Comet" (Comet contest)
• 2005 May 19: "Deep Roots of the Solar Wind" (SOHO/TRACE result)
• 2005 May 24: "Highlights from NASA's Sun-Solar System Connection"
• 2005 May 24: "Solar 'Fireworks' Signal New Space Weather Mystery" (2005 January 20 events)
• 2005 May 31: "Solar Cloud on a Sunny Day"
• 2005 August 17: "History's Greatest Comet Hunter Discovers 1,000th Comet"
• 2005 August 23: "Double Solar Flare"
• 2005 September 12: "Huge Solar Flares Continue" (no current SOHO imagery)
S3C Senior Review, 2005•11•14
J.B. Gurman
Backup slides follow
S3C Senior Review, 2005•11•14
J.B. Gurman
Coronal tomography: three vs. two
views•Assume a flux-rope CME model; how does it look to three coronagraphs?
•Two in ecliptic, one over pole:
Original
Reconstruction
S3C Senior Review, 2005•11•14
J.B. Gurman
Coronal tomography: three vs. two
views•Assume a flux-rope CME model; how does it look to three coronagraphs?
•All three in ecliptic:
Original
Reconstruction
S3C Senior Review, 2005•11•14
J.B. Gurman
Coronal tomography: three vs. two
views•Assume a flux-rope CME model; how does it look to just twojust two coronagraphs?
Original
Reconstruction
S3C Senior Review, 2005•11•14
J.B. Gurman
Supergranules and Doppler shifts
• Ne VII blueshifts overly C IV blueshifts only at supergranular boundaries
• These coincident upflows occur only in coronal holes
• Conclusion: reconnection to open field lines within coronal holes conducive to outflow; in closed-field regions, to heating
S3C Senior Review, 2005•11•14
J.B. Gurman
Lies, Damn Lies, Statistics, Web
Statistics•SOHO Website: typically 0.35 - 0.70 Tbyte week -1 of traffic; up to 2.6 Tbyte week -1 during 2003 October - November events
•SDAC Website: ≥ 0.10 Tbyte week -1, mostly SOHO images and data (both Websites hit by lots of bots)
•Stanford MDI Website: ~ 5 Tbyte of data in the last year
•EIT Web catalog/ftp interface: ~ 1.5 Tbyte of data so far this year
S3C Senior Review, 2005•11•14
J.B. Gurman
Consumables: power
S3C Senior Review, 2005•11•14
J.B. Gurman
Consumables: fuel
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