The National Aeronautics and
Space Act of 1958 directed the annual Aeronautics and Space Report to include
a "comprehensive description of the programmed activities and the accomplishments
of all agencies of the United States in the field of aeronautics and space activities
during the preceding calendar year". In recent years the reports have been
prepared on a fiscal year basis, consistent with the budgetary period now used
in programs of the Federal Government. This year's report covers activities that
took place from October 1, 1998 through September 30, 1999..