SOHO February 26 Eclipse Page

ECLIPSE OF FEBRUARY 26 1998: OBSERVING REQUESTS FOR EXPERIMENTS, PER EXPEDITION, AND EXPERIMENT PLANS

Table 1. EIT, LASCO, SUMER

EXPEDITION/INSTRUMENT	EIT	LASCO	SUMER
NSO, etc: JOP071	Synoptic in Fe IX, Fe XII and Fe XV	C2 White light and Fe XIV	not defined
RMO Belgium	Synoptic in Fe IX, Fe XII and Fe XV	C2 White light and Fe XIV	not defined
ESA/SSD	Synoptic	C1 and C2	Prominences in He and Lyman
Williams College	Synoptic sequence at totality (18:09:56-18:12:56 UT)	C1 in green continuum and C2, at totality	No request
NSF, SAO, GSFC	No request	C2 and C3 polarization, C1 Fe xiv (5303), Fe x (6374), and polarization at 5303 A	No request
Institut d'Astrophysique, Paris - CNRS	HeII 30.4 nm at 18:32 UT. Coronal image as close as possible	C1 Green line (530.3 nm) polarization at 18:30 +/- 15 mn. Synoptic C2 and C3	O VI, Lyman Beta and the C II lines at 1.1 to 1.3 Ro above the pole. At totality +/- 24 hours.

Table 2. CDS, UVCS, MDI

EXPEDITION/INSTRUMENT	CDS	UVCS	MDI
NSO, etc: JOP071	Fe XIII, Si IX rasters	TBD with UVCS team	Simultaneous synoptic
RMO Belgium	No request	No request	No request
ESA/SSD	No request	No request	No request
Williams College	No request	No request	No request
NSF, SAO, GSFC	No request	Polarization of K-corona, 1.8 and 3.0 Ro, Ly-alpha, -beta, O VI and Si XII doublets	No request
Institut d'Astrophysique, Paris - CNRS	No request	No request	No request

                         

EXPERIMENT PLANS:

CDS:   Eclipse Support Activities from CDS. Our current plan is the
       following: We are committed to a collaboration with
       Phil Judge and the NOAO/HAO activities. A target at C.M.
       will be chosen about 7 days prior to the eclipse and we
       will spend about 2 hours on it each day making 4x4
       maps in selected lines. On the day ofthe eclipse, we
       will map the same region on the limb. After the eclipse,
       we will continue to map the region as it passes from sight.
       HOWEVER, if on eclipse day an east limb target is better,
       we will map it and track it to C.M. over the next 7
       days. The entire support activity takes about 2 hours per
       day - encompassing the eclipse period on February 26th.
	    In addition, we will produce some raster 'mosaics'
       running along either the west or east limb, prior to and
       after the eclipse.
	    Since SUMER will be operative, we anticipate 
       medium rate telemetry.

MDI:   For a 10-minute period centered on the eclipse, the MDI instrument 
       will suspend the Dynamics campaign to take full-disk magnetograms
       and continuum images at a one-minute cadence. This will provide 
       one or two low-noise magnetograms averaged over the 5-minute solar 
       oscillation period and continuum images for coregistration and sunspot
       information. 

       Requirements:

       This plan will require the MDI high-rate telemetry channel (i.e., no 
       SSR record mode) and NRT commanding availability just before and just
       after the eclipse to keep the interruption to Dynamics to a minimum.
       It would be preferable to have the data in VC2 for prompt quicklook 
       analysis although VC3 is acceptable if necessary due to bandwidth.

LASCO  Lasco has requested use of SSR or backup antenna to guarantee
       EIT reception of the eclipse data.

       A timeline for the LASCO eclipse observing program can be found
       here

SUMER: The following observing program has been submitted by Spiros Patsourakos
       and Jean-Claude Vial, after approval by Klaus Wilhelm and Philippe
       Lemaire:click

UVCS:  TBD