SOHO & the February 26 Eclipse


Latest Images from SOHO instruments (LASCO, EIT, CDS, UVCS)continuously updated


SOHO supports several eclipse expeditions with coordinated observations during the upcoming Solar Eclipse on February 26, 1998. (For SOHO, in orbit around L1, the Sun will of course not be occulted.)

A summary table of observing requests per instrument, followed by a description of the observing plans per instrument is listed here. Links to individual SOHO instrument eclipse homepages:


Contact: Piet Martens, SOHO Science Operations Coordinator
soc@esa.nascom.nasa.gov


Eclipse Information:




SOHO Supported Eclipse Expeditions


NSO/HAO/Michigan State/Rhodes College/Lindau expeditions

CONTACT PERSON: Phil Judge (judge@jabba.hao.ucar.edu )
INTITUTIONS:HAO/NSO/MICHIGAN/RHODES COLLEGE/LINDAU
LOCATION: Curacao and on an NCAR C-130 aircraft
ECLIPSE TIMES:

        CIRCUMSTANCES OF ECLIPSE AT SABINE WESTPUNDT, CURACAO 
                    Duration of Totality = 3 m 34 s
                    Time of mid Totality = 18:13:11 UT
                    Second Contact       = 18:11:26 UT
                    Third Contact        = 18:14:56 UT
      
The orientation of the Sun on 26 February is :
                    P angle = -20.77 deg
                    B angle = -7.18   deg
                    apparent Radius = 16 arc min  9.01 arc sec
GOAL OF OBSERVATIONS:
TYPE OF OBSERVATION:
SOHO OBSERVATIONS REQUIRED:
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Royal Metereological Institute of Belgium

CONTACT PERSON: Frederic Clette ((Frederic.Clette@ksb-orb.oma.be)
INSTITUTIONS: Royal Metereological Institute of Belgium
LOCATION: NW of Curacao Island (Kadushi Cliffs)
ECLIPSE TIMES: close to those of 1.
GOAL OF OBSERVATIONS: absolute determination of the electron density distribution from 1 to 3 Rsun
TYPE OF OBSERVATION: white-light polarization (photographic and CCD)
SOHO OBSERVATIONS REQUIRED:
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ESA/SSD Eclipse Expedition

CONTACT PERSON: Bernard Foing ( (bfoing@estec.esa.nl)
INSTITUTIONS: Solar System Division of ESA/SSD
LOCATION: Pointe a Pitre, Guadeloupe
ECLIPSE TIMES: First contact at Pointe-a-Pitre: 17:05:07. Totality at 18:31:05 to 18:34:00 UT
GOAL OF OBSERVATIONS: TYPE OF OBSERVATIONS:
SOHO OBSERVATIONS REQUIRED:
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Williams College Eclipse Expedition

CONTACT PERSON: Jay Pasachoff ( jmp@williams.edu)
INSTITUTIONS: Williams College, Williamstown, Massachusetts
LOCATION: Aruba
ECLIPSE TIMES: 18:08:45 - 18:12:15 UT (totality)
a search for 1-Hz oscillations in the coronal green line; a coronal temperature map through the Cram method of comparison of ultraviolet bands sensitive to the Doppler broadening of the photospheric absorption spectra at coronal temperatures; and a set of CCD images through a green continuum filter closely matching one of the bands on the LASCO C1 coronagraph and with a similar field of view. The last observation, in collaboration with Guenter Brueckner, should provide a scattered-light calibration for that coronagraph.

SOHO OBSERVATIONS:

Full link at: IAU Eclipses
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NSF, SAO, GSFC Eclipse Expedition

CONTACT PERSON: Shadia Habbal ( shabbal@solar.stanford.edu)
INSTITUTIONS: Smithsonian Astrophysical Observatory, Goddard Space Flight Center, Jet Propulsion Laboratory
LOCATION: Guadeloupe
ECLIPSE TIMES:Totality at Pointe-a-Pitre, 18:31:05 to 18:34:00 UT
GOAL OF OBSERVATIONS: Electron densities and temperatures in streamers and coronal holes, elemental abundances, magnetic field directions, and calibrations
TYPE OF OBSERVATIONS: Photometric observations of the Fe lines: 7892, 6374 and 5303 A
SOHO OBSERVATIONS REQUIRED: Coordination with SOHO, VLA, and radio occultation measurements during the superior conjunction of the spacecraft Galileo which is orbiting Jupiter
Full description: here
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Institut d'Astrophysique, Paris - CNRS Eclipse Expedition

CONTACT PERSON: Serge Koutchmy ( koutchmy@iap.fr)
INSTITUTIONS: Institut d'Astrophysique, CNRS
LOCATION: Guadeloupe, Guery, Grande-Terre
ECLIPSE TIMES:Totality at 18:31:05 to 18:34:00 UT
GOAL OF OBSERVATIONS: Morphological Imaging Analysis, Spectroscopic Analysis, Green Line (Fe XIV) polarisation with Sac Peak, White Light polarization with IZMIRAN
TYPE OF OBSERVATIONS: Low spectral resolution slit- spectra, images
SOHO OBSERVATIONS REQUIRED:
Full description: here
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Last modification: Friday 20 February 1998