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SOHO Status Report - January 2009

SOHO Status Report - January 2009

Mission StatusThe spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. All SOHO instruments are nominal and science operations are progressing smoothly.

Operations & Archiving

A nominal station keeping manoeuvre and 180° roll were performed on 21 August 2008, for which 0.059 kg of fuel was used. The remaining hydrazine is 117 kg. The solar array degradation after 153 months of flight is 19.8%, which corresponds to 1.55% per year. All SOHO data is in the public domain. Links to the SOHO archives (including mirrors) are accessible at http://soho.esac.esa.int/data/.

Science Highlights

On 25 June 2008 SOHO captured its 1500th comet.

On 11-15 August 2008 the 21st SOHO Workshop was held in Boulder, Colorado, USA, covering all areas of helio- and astroseismology, with special emphasis on what these methods have taught us about the dynamo generation of solar and stellar magnetic fields.

A new method for predicting the approach and intensity of hazardous particles from extreme solar events that would threaten astronauts and technology was for the first time tested under operational conditions during the Atlantis Shuttle Mission. Based on COSTEP measurements of relativistic electrons, it permits up to an hour of warning for the later arriving protons in solar energetic particle events.

A correlation is found between energy in the solar oscillation spectrum from 10 years of VIRGO disk-integrated sunlight data and the solar X-ray flux suggesting that flares drive global oscillations in the Sun in the same way that the entire Earth is set ringing for several weeks after a major earthquake.

Over 3250 papers have been published in the refereed literature.

Legal disclaimer This report is based on the October 2008 SPC submission and the December 2008 Council submission. Please see the copyright section of the legal disclaimer (bottom of this page) for terms of use.

Legal disclaimer
This report is based on the October 2008 SPC submission. Please see the copyright section of the legal disclaimer (bottom of this page) for terms of use.

Last Update: 1 September 2019
18-Sep-2021 06:50 UT

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