Index of /holdings/ihw-c-rssl-n-ndr-halley-v1.0
Name Last modified Size Description
Parent Directory -
catalog/ 16-May-2011 09:07 -
data/ 16-May-2011 09:08 -
document/ 18-May-2011 14:13 -
DOWNLOAD/ 24-May-2012 11:18 -
geometry/ 11-May-2011 13:12 -
index/ 24-May-2012 11:18 -
software/ 11-May-2011 12:13 -
aareadme.txt 16-May-2011 08:06 3.2K
dataset.html 03-Jun-2014 08:46 3.3K
errata.txt 11-May-2011 13:19 1.5K
voldesc.cat 16-May-2011 09:09 3.6K [PDS catalog file]
PDS_VERSION_ID = PDS3
RECORD_TYPE = "STREAM"
OBJECT = TEXT
PUBLICATION_DATE = 2011-05-16
NOTE = "AAREADME File for re-organized IHW data set"
END_OBJECT = TEXT
END
Re-organized International Halley Watch (IHW) Data Sets
=======================================================
The original IHW "mixed disks" contained ground-based observations from
various networks ("nets" in IHW parlance). These data, belonging to
over two dozen individual data sets, were intermixed on the orignal
set of volumes called HAL_0019 to HAL_0023. The data were sorted
choronologically by date of observation only, and were otherwise not
separated by data set ID or type of observation.
The data were also archived under a fairly early form of the PDS
Standards, 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.
- A.C.Raugh, 2011-05-11