***** File ERRSINFO.TXT Original identification of the errata reported in this directory is principally due to the IHW Lead Center (LC) at the Jet Propulsion Laboratory (JPL), and in particular to Mikael Aronsson. The major exception to this is the errata for the Large-Scale Phenomena (L-SP) Discipline, which is reported by the L-SP Discipline Specialist (M. B. Niedner). We at the NASA/Goddard Space Flight Center (where the CD-ROMs were produced and pre-mastered) received Aronsson's errata files well enough in advance of actual CD-ROM fabrication to edit some, but by no means all, of the FITS headers which either contained erroneous keyword values or possessed some defect in (FITS) structure. In many instances, it should be pointed out, the errors were of a straightforward nature and were incontrovertible. When a correction was made to a header or a table, Aronsson's comment in the relevant errata file was (at least in most cases) deleted. Very rarely, if ever, was material edited when the "error" was a matter of opinion or conjecture, or was a "close call": the original headers (or tables) were allowed to stand and Aronsson's comments were preserved. The attitude was that the archive end-user should make up his or her own mind in these (many) instances. Although a great deal of effort in error detection had been expended by Mikael Aronsson (through years of receiving and reviewing submissions from the IHW Discipline Specialists), once the archive was "on-line" on NASA/GSFC's mass storage facility (refer to ACKNWLDG.TXT file in root directory), it was possible to run the entire corpus of datafiles, headers, tables, etc., through a series of simple and routine "checks". These tests had mostly to do with file size, FITS structure, uniqueness of internal filenumbers, and so on. We detected some additional errors (not seen by Aronsson) during this phase of data preparation, and the appropriate corrective measures were taken. Additionally, a letter went out from the CD-ROM production team at NASA/GSFC to the Discipline Specialist community stating that the archive was on-line, and hence the opportunity existed to make final corrections in a reasonably small number of files; several of the Discipline Specialists sent us requests to make such changes and they were made. According to Mikael Aronsson, who produced the so-called "Printed Archive indices" contained on these CD-ROMs (in the /INDEX/NETABLES directory), as well as the two Discipline-specific indices NETRADIO.IDX and NETSPECT.IDX (same directory), many of the errors listed in the errata files were corrected by him in those indices which he produced. [It should be pointed out that many indices on these CD-ROMs, including the "quick look" indices, were produced at NASA/GSFC] What we have, then, is a situation in which the errors resident in some of the FITS headers and table files may or may not be present in the relevant Printed Archive indices or Discipline-specific indices. The archive user is simply encouraged to compare the contents of the errata files with the appropriate headers, tables, and indices. Malcolm B. Niedner, Jr. IHW Discipline Specialist for Large-Scale Phenomena NASA/Goddard Space Flight Center