MINUTES OF SHARE MEETING			4/25/01

We started with a series of planned presentations on the status of several
"works in progress":

1. Daryl Swade gave us a summary of OTFR and its implications.
   OTFR changes our notion of an archive from "stored calibrated data" to
   "stored telemetry and s/w needed to process and calibrate it".  
   This makes it an "active archive".

2. Paolo Padovani talked about the data "scrapbook" being rolled out by the
    archive:
	- Prototype for release by June AAS meeting
	- Delivers previews for all bands/instruments at a given point/object
	  on the sky
	- SHARE should provide input on where to go next
	- This process has provided databases that now make it possible to do
	  searches like "all WFPC2 images with > 1 filter at a given location."

3. ACS pipeline described by Bill Sparks and Marc Postman

	1- alignment module - get registration right
	2- PyDrizzle
	3- sextractor - object detection, photometry, classification
	4- BPZ - Bayesian Photometric Redshift algorithm
	5- Morphological fits - bulge/disk decomposition etc.

4. ECF/WFPC2 Processing
	- Defining WFPC2 associations to produce stacked images.
	  Had to recreate some jitter files.
	  Uses a PRE-BUILT CATALOGUE to be delivered later this year.
	- Basically restricted to CR-SPLIT images
	- Can't deal with dithered images

5. New archive distribution system slated for August
	- Will deliver compressed data, different formats, selected files.
	- No accounts will be required for public data.
	- Will handle multimission data.

We then heard from various committee members on a wish list of potential
processing/reprocessing ideas for SHARE to consider in its implementation
timetable:

1. Anton K.
	- Produce generalized overlap/combined/drizzled images
	- Allow different representations - color images, contours

2. Mark D.
	- Discussed crucial science issues that are important prior to
	  producing ditheredimages:

	  How good is my astrometry?
	  ==> Tune-up the WCS as a post-processing step.
	      This may give a better starting point for cross-correlation
	      registration techniques.
	      As an example, SIRTF in working on identifying 2MASS stars
	      in their images as astrometric references.

3. Bill S.
	- agreed that better astrometry and WCS updates were important
	- As a value added-product for later use, it would be good to enhance
	  the data quality array-- create a unique mask for CRs and hot pixels
	  for each image and save it.

By email, Dorothy F. suggested the following (brief summary-- she sent emails
to the full group):

	- If users create valuable products, encourage them to submit them
	  to the archive.
	- Consider encouraging users to write processes for OTFR implementation
	- More generalized searches across the archive
	- Allow the use to choose the delivery media (charge, if necessary)
	- SHARE group should discuss qulaity information associated with a
	  data set.
	- Specific special processing examples:
		* Create an image <M x N> in <N> wavelength band(s) at <pos>
		* Create a spectrum covering <w1 to w2> for <object>
		* Process data sets with the provided calibration files
		* Process data sets with the calibration algorithm
		  provided by the user