Index of /holdings/ihw-c-irftab-2-rdr-gz-v1.0
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aareadme.txt 18-May-2011 12:54 3.7K
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voldesc.cat 10-Jun-2011 10:45 3.6K [PDS catalog file]
PDS_VERSION_ID = PDS3
RECORD_TYPE = "STREAM"
OBJECT = TEXT
PUBLICATION_DATE = 2011-05-18
NOTE = "AAREADME File for re-organized IHW data set"
END_OBJECT = TEXT
END
Re-organized International Halley Watch (IHW) Data Sets
=======================================================
The original IHW HAL_0024 disk contained ground-based observations from
various networks ("nets" in IHW parlance) of comets Giacobini-Zinner and
Crommelin - both used as test targets by the IHW observers. These data
on Comet Giacobini-Zinner, belonging to two dozen individual data sets,
were intermixed on the original volume. The data were sorted
chronologically by date of observation only, and were otherwise not
separated by data set ID or type of observation.
The data were also archived under the PDS1 standards, which bear little
resemblence to the PDS standards of today (currently PDS3, with PDS4 in
development), and formatted to an equally early form of the FITS table
standard, where appropriate, resulting in some particularly arcane
formats for the modern user - including PDS labels with deprecated
terminology and a preponderance of single-record FITS ASCII table
files with header segments separated from data segments.
The reorganization effort sought to separate the data files constituting
the unique data sets into a more contemporary, single-data-set-per-volume
format for ease of access and distribution. The data have been sorted
into a subdirectory hierarchy based on observation date, unless the number
of data files was small enough that this seemed more disruptive than
helpful, in which case all the observations are located directly in the
DATA/ subdirectory.
The data files and most supporting files are presented here in their
original format, problematic though that might be. Users interested in
analyzing the data would probably do well to inquire of the PDS or the
Small Bodies Node for version 2.0 of the observational data set.
The additional ancillary directories, including documentation, ephemerides,
software and such, are duplicated in their entirety in all the related
separate data sets
- A.C.Raugh, 2011-05-18