To:      Visiting Committee

From:    Eric Greisen

Date:    1 April 1994

Subject: Annual Report on Classic AIPS


     There were two releases of Classic AIPS during the past year.  The
15JUL93 release was shipped to 94 institutions (33 on 4 kinds of
magnetic tape, 61 electronically).  The 15JAN94 release has already
been shipped to 44 institutions, 80 per cent electronically.  Two
institutions, CIT and CfA, have subscribed to the 15JUL94 release that
is under active development.  As has been done for Socorro for years,
their copies of AIPS are updated automatically and electronically on
nearly a daily basis.

     During the year, AIPS was ported to a number of new operating
systems.  These are (1) Solaris, Sun's new Bell System V based OS, (2)
OSF/1, used on DEC's Alpha computer, (3) HPUX, Hewlett-Packard's Unix,
and (4) Linux, a public-domain Unix OS for 80386 and 80486 type
personal computers.  The AIPS verification and performance package
DDT was modernized and used to test these and numerous other
computers.

     The AIPS Group lost almost all of the time of two of its core
members.  Gustaaf van Moorsel was promoted to Head of the Computer
Division at the AOC and Bill Cotton has moved from the Computer to the
Scientific Services Division in Charlottesville.  Leonid Kogan, a VLBA
employee, and a new-hire post doc, Athol Kembal, will attempt to
replace Gustaaf at the AOC.  No one can replace Bill.

     A large amount of new or improved software was added to AIPS
during the year.  Major areas of concern were reading VLBA Correlator
data, wide-field imaging (for VLA surveys), general imaging problems,
VLBI data calibration, and improved access to information about the
large volume of tasks available to the user.  Since the Visiting
Committee was unwilling to hear details last year, I will not bore you
with them this year.  Anyone who is interested may consult NRAO's
Quarterly Reports and/or the AIPSLetter which is issued with each
release.