Index of /holdings/ihw-c-astr-2-edr-crommelin-v1.0

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 catalog/                24-May-2011 11:33    -   
 data/                   24-May-2011 11:33    -   
 document/               25-May-2011 08:27    -   
 DOWNLOAD/               23-May-2012 08:53    -   
 geometry/               24-May-2011 11:04    -   
 index/                  23-May-2012 08:53    -   
 aareadme.txt            24-May-2011 11:26  3.5K  
 dataset.html            30-Mar-2017 12:34  2.5K  
 voldesc.cat             10-Jun-2011 10:51  3.6K  [PDS catalog file]

PDS_VERSION_ID = PDS3                                                         
                                                                              
RECORD_TYPE    = "STREAM"                                                     
                                                                              
OBJECT     = TEXT                                                             
  PUBLICATION_DATE = 2011-05-24                                               
  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 27P/Crommelin, belonging to 18 individual data sets, were in a          
separate subdirectory tree of the original volume.  The data were sorted      
into additional subdirectories by discipline network, but were not            
otherwise separated by data set ID.                                           
                                                                              
The data were ostensibly archived under PDS1 standards, but no catalog        
files or labels were included on the disk.  The information in the PDS        
catalog database is very generic and nearly identical for each data set in    
this collection.  Users interested in the individual observations would       
likely get more useful information from the published IHW books and           
papers. The catalog files provided here were dumped from the PDS catalog      
database but not otherwise altered except to correct the target, which was    
incorrectly listed as Comet 1P/Halley prior to this reorganization effort.    
                                                                              
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 are subdivided into     
directories by date, unless the number of observations is small enough        
that such a division did not seem useful.                                     
                                                                              
The data files and most supporting files are presented here in their          
original format, problematic though that might be.                            
                                                                              
The additional ancillary directories, including documentation, ephemerides    
and such, are duplicated in their entirety in all the related separate        
data sets.                                                                    
                                                                              
- A.C.Raugh, 2011-05-24