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