PDS_VERSION_ID = PDS3 RECORD_TYPE = "STREAM" OBJECT = TEXT PUBLICATION_DATE = 2011-05-25 NOTE = "AAREADME File for re-organized IHW data set" END_OBJECT = TEXT END Re-organized International Halley Watch (IHW) Data Sets ======================================================= The original IHW volume HAL_0025 and HAL_0026 contains data from several spacecraft that flew by comets Halley and Giacobini-Zinner, over 40 data sets in all on the 2 volumes. The data were sorted into subdirectories by spacecraft and instrument, with shared supporting directories. 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, occasionally producing some arcane formats for the modern user - including PDS labels with deprecated terminology and FITS files that sometimmes have their header segments separated from their 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. Although the original disks included executable files for some simple utilities, these have been omitted from the reorganized data. No modern system would run the executables, and in most cases no source code was provided. For those rare cases where source was provided, it has been relocated to a relevant support directory where its principal value is as documentation. Note that PDS does not and will not support this code. - A.C.Raugh, 2011-05-25