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STS-99, Mission Control Center
Status Report # 23 Tuesday,
February 22, 2000 - 6:00 a.m. CST
Endeavour's crew
is preparing for a return home today, working toward a touchdown at
the Kennedy Space Center, Florida, at 3:50 p.m. CST, the first of three
landing opportunities. A second opportunity to land in Florida is available
with a touchdown at 5:22 p.m. CST. Endeavour also may land at Edwards
Air Force Base, California, with a touchdown at 6:48 p.m. CST.
Flight controllers
are closely monitoring the weather at the Kennedy Space Center and at
Edwards Air Force Base. High winds and possible cloud cover are forecast
for Kennedy that could prohibit a landing there. The forecast for Edwards
calls for acceptable landing weather.
To land on the
first opportunity to Florida, Endeavour would fire its engines to begin
its descent at 2:53 p.m. CST. For the second Florida landing opportunity,
Endeavour would fire its engines at 4:24 p.m. to leave orbit. For a
landing in California, Endeavour would fire its engines at 5:51 p.m.
CST.
Along with the
six astronauts, aboard Endeavour are 332 high-density tapes from the
Shuttle Radar Topography Mission containing data that will be used to
produce global maps more accurate and more unified than any available
today. During 222 hours and 23 minutes of operation, Endeavour's radar
covered 99.98 percent of the planned mapping area - land between 60
degrees north latitude and 56 degrees south latitude - at least once.
About 94.6 percent of it was covered twice. Only about 80,000 square
miles in scattered areas remained unimaged, most of them in North America
and most already well mapped by other methods. The data on the tapes
would fill about 20,000 CD's. The total area mapped is more than 47.6
million square miles.
Also aboard Endeavour
is a student experiment called EarthKAM which took 2,715 digital photos
during the mission through an overhead flight-deck window. The NASA-sponsored
program lets middle school students select photo targets and receive
the images via the Internet. The pictures are used in classroom projects
on Earth science, geography, mathematics and space science. More than
75 middle schools around the world participated in the experiment, which
set a record. On four previous flights combined, EarthKAM sent down
a total of 2,018 images.
The last Space
Shuttle mission to land at Edwards was STS-76 in March 1996. Since then,
20 missions have landed at Kennedy. The next status report will be issued
Tuesday after landing or as events warrant.
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