Liens and other notes from 1999 PDS Asteroids Review.
April 12, 1999.

Note: For the NEAR data, liens will be corrected by SDC, with help from PDS 
where appropriate. For the non-Near data sets, liens will be corrected by 
Carol Neese except where noted. Liens on non-NEAR data sets which are to be 
cleared by people other than Carol are highlighted with a *.

. NEAR Mathilde MSI

. Add the following informaton to the existing index.
	a) a flag telling whether the asteroid is present in the image
	b) a note to the purpose of each image (optical navigation,
		   satellite search, etc.)
	c) range to target   
	d) pixel resolution 
	f) flag to show which images are grouped

. Explicitly state in the archieve (in the aareadme or voldesc file) that the
	only instruments on for the mathilde flyby were MSI and RS.

. Include in the data set catalog a short writeup detailing the imaging 
	objectives throughout the flyby, and identifying the images
	containing resolved images of Mathilde. If the resolved images fall
	into groups suitable for mosaicing, these groups should also be 
	identified. 

. Expand the section of the mission catalog referring to the mathilde mission
	phase to include a summary of imaging objectives.

. The two papers in the document directory are not referenced. Add references 
	to the published papers.

. Change document filename extensions to give information about the format,
	e.g. .word6. (This is already the case for many files.) 

. For documents presently given only in .pdf format, provide an ascii version.

. The table of bandpasses should be rendered as a PDS data table with its own 
	label, and moved to the calibration directory.

. Provide document labels for all documents.

0. Add to data set catalog the processing history, i.e. none.
1. Data labels should give processing history, i.e. flat field no, dark no,
	geometry no, etc.
2. Add to data set catalog a description of the files provided and where 
	different kinds of information can be found.
3. Add range to target to the PDS data labels. (Should be N/A if the object is
	not in the field).
4. Get from the team the spreadsheet planes for image planning and include in 
	the archive as a document.


For the future: The reviewers strongly urged SDC to obtain the calibration 
Software MSICAL and make it available to users through PDS. Calibration files 
and the information necessary to calibrate images will need to be archived
as well. Reviewers also consider it very important to archive the shape model,
control net, and an image labeled with names of all named features, and/or
a list of all named features with latitude and longitude.

. NEAR Earth-Swingby data.

These data were not under review. the discussion produced the following 
suggestions for these data sets.

Provide a top-level description of what is in each of the files so users can 
find what they need.

For the images, provide pixel scale, grouping status, processing history, and 
latitude and longitude of image center. (Also mentioned above for Mathilde 
images.)

Add a document (such as an index) with imaging objectives, sequence planning,
resolution and/or range, and maybe thumbnail images.

It was agreed that the binary table format (as opposed to ascii tables) is
acceptable for these data files due to long line lengths.

If possible, choose better names for the FITS keywords in the FITS headers. 
Understandable names rather than numbers.

An index to the data would be very valuable since it is harder to browse in 
binary table.

II. NEAR Mathilde Radio Science

.. The filenaming convention is directed incorrectly in the documentation.
	This should be corrected. Also, in the filenames, the year is encoded 
	by a single digit. Document how this digit is to be interpreted, 
	e.g. last digit of calendar year or years since start of mission, or 
	whatever it is.

.. Add descriptive text at the top to tel users where to find the information 
	they need, and what is in all the directories and files. Also tell 
	where to find the final answer, i.e the mase of Mathilde.

.. Remove the section in the data set catalog entitled "Limitations", or simply
	say that there are no known defects in the data.

.. Dick Simpson provided additional formatting corrections by email. These
	corrections are to be implemented.

. Pluto-Charon Mutual Events

.. Add a reference to the data set catalog for the most applicable published 
	paper(s) for the Tholen data, which gives background information to the
	experiment.

2. There were difference between the Buratti data supplied to Dave and that 
	which was in the published paper. Dave needs to talk with Bonnie 
	Buratti and find out which one is correct.

. Write instrument and instrument host catalogs or find them if they already 
	exist.

. Add a keyword to the labels to identify the telescope(s) used. Also identify
	in the text which data were taken with which telescope and with which 
	CCD. Telescopes must be described in the inst host cat, and given 
	telescope id's.

Note: Reviewers suggested that the "Plubib" bibiliography be acquired and 
added  to this data set in a future update.

V. Gaffey Meteorite Spectra

1. Observer full name should be Mike Gaffey. Remove "data provider full name"
	from data set catalog as this is an obsolete keyword.

2. Dan Britt will contact Gaffey to make sure he knows his data are being 
	archived.

3. In the index, meteorite names should be capitalized.

4. Many meteorite classifications have been updated since Gaffey compiled them.
	Update the meteorite classifications to current classifications. Dan
	Britt has voulnteered to do this.

5. Change microns to nanometers in the data label.

6. Add information to the data set catalog about how the data were taken, the
	instrument used, how the samples were prepared, particles sizes, etc.
	Dan Britt will reproduce this information from Gaffey or other sources
	and provide to Carol inclusion in the data set.

7. Add descriptions to the column objects in the index label.

Note: Dan Britt offered to take the lead in gathering meteorite spectra for 
	archiving in PDS. He plans to start by doing the work outlined here
	for the Gaffey spectra, as well as producing a list of potential data
	providers.

I. Asteroid Lightcurve Parameters (Update)

. Check with AL Harris to find out what appears in the sidereal period flag in
	the case of a trojan or other orbit type with a long rotation period.
	The rotation period flag should take precedence over orbit information.
	Also confirm that 'A' always stands for Aten and not Apollo or Amor.

Note: Reviewers noted that this is a very useful data set and should be updated
	 each year that an update is available.

II. Asteroid Taxonomy (Update)

.. Add the asteroid Pholus to the table.

. Two entries at the end of the table are in reverse chronological order.
	Reverse them to chronological order.

Note: Reviewers made several suggestions for future updates to this data set.
They recommend collecting asteroid taxonomies from additional sources 
including Wisniewski's classifications and Hammergren's. Ideally, for each
asteroid spectrum archived in PDS there should be a taxonomic classification in
this table. Dan Britt also asked Dave Tholen to create an additional taxonomy 
file with his personal assignment of taxonomic clasifications. Mark Sykes asked 
for a piece of code which could take a spectrum in the appropriate wavelength 
range and resolution and produce a taxonomic classification. Rick Binzel may 
already have such a program. This program could be available as a resource to
users of PDS. The Wisniewski classifications were originally assigned "by eye".
What would be best would be to reclassify them from W's spectra by Dave's 
method.

III. Radar Detections (Update)

1. Correct typo in data set catalog, "This data set" rather than "This data".

2. Remove the coverage comment from the data set overview to the data coverage
	and quality section.

X. Asteroid Polarimetry (Update)

. Reword the awkwardly worded "Ancillary Data" section of the data set catalog.

. Move modification history to come right after the data set overview.

. Document in the label all filters listed in the data table. Convert filter 
	wavelengths to microns. If possible, add bandpass information for
	filters. If that's not possible now, try to get it for the next update.

. Remove list of observatories from the label to its own table, with label.
	Augment the list of observatories to include all observatories cited 
	in the data table.

. Note in the confidence level note that the apdcurv data file has no error 
	values.

Note: It was suggested to separate out the polarimetry bibiliography into its 
	own separate data set for the next year.

. Discovery Circumstances (Update)

. For asteroid names with diacritical marks, the marks should simply dropped 
	in this ascii version, without adjusting the spelling. Change "Roesen"
	back to "Rosen" to comply with this. Note this policy in the data set 
	catalog and/or data label so that users will know how to search the 
	file.

Note: Dave will correct "Roesen" to "Rosen" in his file as well, and continue
to observe this policy with respect to directional marks, so that future 
updates will be consistent.

. Reorder the data table to place the note code before the observer name so 
	people can see it.

I. Asteroid Absolute Magnitudes (Update)

. Only one asteroid in this data set has a note. Take out the note from the 
	table and put the information in the description. Put in as a NOTE 
	keyword in the reference column object in the label.

Note: Dave is compiling a file of absolute magnitudes from the literature, with
quality codes assigned by him. The intent is to provide a file that is complete
for the numbered asteroids. Reviewers encouraged that this file be completed 
and reviewed for PDS, and that it include multiple entries or asteroids with 
multiple observations. They suggested that the MPC values could be included in 
the same file as one of the entries for each asteroid. They also suggested that 
references be given.

II. For all data sets:

. In labels and catalogs, when a published paper is mentioned, its full 
	citation should be given rather than just its PDS designation.

2. In many data sets, information is duplicated in the data set catalog and 
	data label. Remove this duplication by keeping background information
	in the catalog, and immediate information on the data in the label.

3. Formatting corrections to all data sets were supplied by both Anne Raugh and
	Tyler Brown to Carol by email. These corrections are to be implemented.

Discussions:
Larson FTS data: The data tapes have been copied from 9-track to exabyte and 
the decoding of the data into ascii files is near completion. Documentation of 
the data appears to be a major difficulty. It was suggested that we meet with 
Hal Larson again to get his help in documenting the data. Does he have the 
observing logo? Does he have listings of the contents of the tapes? Does he 
have hard copies of any of the spectra for comparison? Also, the data of 
primary interest pertains to Eros and to several comets. Concentrate on 
retrieving, validating, and documenting these first.

-ink comet spectra and images. Mark gave us an update. All the data have been 
written to CD, and the observing logs have been scanned. A significant fraction 
of the information in the FITS headers is incorrect, so the observing logs are 
a necessary supplement to the data.

Anita Cochran offered her own comet spectra for archiving in PDS. She will 
supply it to Mike.

Anita also may be able to supply the Sawyer spectra which are missing from PDS.
Carol will email her with a list of the missing data and he will check if she 
has them.

Asteroid albedos. Don made a start on compiling albedos from different sources,
but found the data to be so inhomogeneous that such a compilation may not be 
useful. He has been unable to locate an electronic copy of the radiometric
albedos from TRIAD. Dan and Mark both indicated that they may have an 
electronic copy of TRIAD, so they will provide it to Don. The suggestion was 
also made to include albedos derived from size. -ave Dunham has an occulation 
diameters file which he sent to Dave Tholen and which is a mess. It needs to be 
fixed up and included in PDS.