soho status update and upcoming changes

Daniel Müller ESTEC RSSD Seminar 2006

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SOHO Status Update and Upcoming

Changes- Spacecraft status (Ton van Overbeek)- Flight ops & ground system metrics (Harold Benefield)- Changes @ NASA (Joe Gurman)- Changes @ ESA (B. Fleck)- Helioviewer (Daniel Müller)





SOHO during the SDO era• Solar Dynamics Observatory (SDO) scheduled for launch in October 2009 (possibly as early as August 2009)

• 3 instruments– Helioseismic and Magnetic Imager (HMI): super-MDI – Atmospheric Imaging Assembly (AIA): super-EIT– Extreme ultraviolet Variability Experiment (EVE)

• After cross-calibration of MDI and HMI during late 2009 / early 2010, MDI will be hibernated

• After cross-calibration of EIT and AIA, EIT will be used for a few synoptic images per day, mainly to monitor long-term response changes of AIA

• All other instruments will continue to be operated in current mode





Changes to ops/sciops• Science operations will be much simpler after hibernation of MDI– No spacecraft transitions – Simpler roll steering law: ecliptic North up– Simplified daily operations

• Automated spacecraft operations following an in-house reengineering effort– New ground software (pass generator, anomaly detection and notification)

– Changes to Central On-Board Software– Night passes fully automated since October 2007– Started automating also day passes in mid September

– “Lights-out” operations to start in the fall of 2009





Cost saving measures

• Appreciate budget pressures on the ESA science programme and that SOHO is an older mission

• Accept increased risk

• To reduce cost, engineering support for SOHO will be implemented remotely from Europe

• Simplified science operations concept alleviates requirement for ESA Science Operations Coordinator





Publications in refereed journals

• > 3300 papers

• > 3000 authors

• > 170 theses

Searchable SOHO bibliography: http://soho.nascom.nasa.gov/publications/publications.html





Data accessibility

• Completely open data policy– “The Sun is shining for everybody”

• All SOHO data available online through– SOHO archive

– PI sites

– Virtual Solar Observatory (VSO)

• IDL Solarsoft routines– Calibration

– Analysis





Community interest - some examples

• EIT: served 794 GB in NASA’s FY 2007 and 2008 to 1,349 unique requesters (not counting downloads through SOHO archive or VSO)

• MDI: served over 17 TB in response to >10,000 requests in the last two years

• LASCO: over 1500 comet discoveries (i.e. over half of all comets for which orbital elements have been determined), and of those over 70% by amateur astronomers accessing LASCO real-time data





• Monthly averages – 27 million requests

– ~ 15 TB downloads

• Last 12 months– 328 million requests

– 176 TB downloads

• Total– 1.5 billion requests

– 450 TB data downloads

Lies, damn lies, statistics, web statistics





SOHO in popular magazines





SOHO and the popular imagination





SOHO archive status

• Developed by ESA SOHO PS team at GSFC• Content identical to that of PI teams

– Exception: high-rate MDI data, which are stored only at Stanford

• Current to within a few months after level-0 data delivery

• Mirror archives at– MEDOC, IAS Orsay, France– Univ. of Torino, Italy– ESAC

• Instrument resources pages – Software tools– Calibration

• Efforts underway for “final archive” (cf. Mission Archive Plan)





Why keep SOHO going?This question was submitted via for SOHO WEBMASTER (SOHO Webmaster) on Wednesday, February 11, 2009 at 21:47:05---------------------------------------------------------------------------Name: AGC(AW/SW) Burt CrapoE-mail: [email protected]: contentQuestion: I am the Chief Meteorologist for the IWO JIMA STRIKE GROUP currently on deployment. One of my functions is to provide a solar forecast to the Staff's for use in determining impacts from solar effects on SATCOM operations. I have using imagery provided on this site to track coronal holes and sun spot regions for this purpose.The imagery is seriously out of date and has been this way for several days now. Is there an expected time that imagery will become current again?Is there a similar web site to this one on a classified web site (SIPR Net)?

Thanks.

Burt Crapo, AGC(AW/SW)OA LCPOUSS IWO JIMA (LHD 7)[email protected]





Why keep SOHO going?

This is bad... I can almost hear it on NPR:

"...Crew of the USS IWO JIMA failed to direct Sea Sparrow type missiles during fierce attacks by Taliban insurgents on inflatable boats after on-board SATCOM operations were severely affected due to bad information provided by a solar physics website hosted at NASA. The Pentagon is investigating two suspects, a Spanish and a Greek national for their possible involvement in the alleged misinformation campaign. This is Corey Flintoff...."





Solar cycle 24

Proposed Mission Extension





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Total Solar Irradiance (TSI)





SOHO mission extension cost

• Current annual cost to ESA: 2 M€

• Extension 2010-2012: 1.28 M€ / year





SOHO archive access





SOHO archive





SOHO instrument resources





SOHO archive access





SOHO archive interface

soho status update and upcoming changes

Documents

soho webmaster soho

esa soho ps team

opssciopsscience operations

highrate mdi data

popular magazinessoho

final archive

tb downloadslast

esa science programme