[bananas] Third set of patches for 15APR98

[Pat Murphy]

There are two new patches for 15APR98 AIPS now available, in addition to
those already announced on May 5 and April 23 (and the correction on May
6).  The patches are:

   Task     Description of problem                             Date
   -------------------------------------------------------------------
   BPASS    handles flagged channels and interpolation wrongly 1998-05-05
                                                     corrected 1998-06-18
   <tape>   Digital Unix version 4.0D tape tasks               1998-06-05
   <fits>   Y2K addition to FITS table readers                 1998-06-05

Complete information on these, including the modified source code and
instructions for rebuilding the affected tasks, can be obtained via:

	 http://www.cv.nrao.edu/aips/15APR98/patches.html

Descriptions of the individual problems for the tape and fits patches are
shown below; the BPASS bug description was not changed but the patch
itself (BPASS.FOR) was corrected.  If you applied the patch for BPASS
anytime between May 5 and June 18, please accept our apologies and
retrieve the latest version.

				- Pat

  ------------------------------------------------------------------------

Task:    Digital Unix version 4.0D tape tasks

Summary: The new release of the Digital Unix operating system version 4.0D
         generates a serious error condition when a back-file operation
         encounters the beginning-of-tape.  Code to handle this condition
         has been patched into the basic tape manipulation subroutine.
         Apply this patch ONLY if you have a DEC ALPHA computer running
         OSF/1 4.0D (look for "vmunix: Digital UNIX V4.0D" in
         /var/adm/messages). 

Documentor: Eric Greisen
Date:       1998-06-05

  ------------------------------------------------------------------------

Task:    FITLD, UVLOD, IMLOD

Summary: Some FITS writers including AIPS and the VLBA correlator
         will begin writing dates as 'YYYY-MM-DD' rather than
         'DD/MM/YY' beginning on 1 January 1999.  15APR98
         installations may wish to prepare to receive such tapes next
         year.  This patch should be enough. 
              
         The TABHDR patch also disables "gain transfer" from the VLBA
         correlator which is not working properly.

Documentor: Eric Greisen
Date:       1998-06-05

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-- 
  \|/  ____  \|/   Pat Murphy; email http://orangutan.cv.nrao.edu/kippure.html
   @~ / oO \ ~@                  Division Head, NRAO/Charlottesville Computing
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