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STS-99, Mission Control Center
Status Report # 20 Sunday, February
20, 2000 - 6:30 p.m. CST
Earth radar mapping continues
smoothly on its last full day with Endeavour’s crew scheduled to
wrap up operations early Monday morning at 5:53 Central Time. As
of noon today, 99 percent, or about 47 million square miles of the target
area had
been mapped once. More than 87 percent of the target area – nearly
42 million
square miles – has been mapped twice.
With another 10 minutes added
to mapping operations, complete mapping of
Australia will be completed with Flinders Island on the northeast corner
of
Tasmania being the final area mapped. Stowage of the 200-foot-long mast
is set to
begin at 7:14 a.m. By 7:50 tomorrow morning, the radar system and pallet
should
be deactivated.
The additional 10 minutes
of mapping brings the total imaging time to nine days, 18
hours, 10 minutes, which equates to 99.96 percent of the planned coverage
area
being mapped during the mission. The coverage area extends from Hudson
Bay in
the north to the tip of South America, an area equal to 47.6 million
square miles.
Only 80,000 square miles of the target area – about the size of
West Virginia – will
remain unmapped by the end of mapping operations. However, the majority
of this
unmapped area is in North America and already has been accurately mapped.
Images released today included
Oahu, Hawaii; Miquelon Island and St. Pierre
Island, Newfoundland; Kamchatka, Russia; and Oberpfaffenhofen, Germany
(home of the German Aerospace Agency). Other new images showed Katmandu,
Nepal; Cotopaxi, Ecuador; and Baikal, Russia. Data of volcanic sites
around the
world, such as Hawaii and Kamchatka, will be useful for studying the
history of
volcanic activity in dormant volcanoes, as well as for hazard preparedness
in active
volcanic areas. Areas mapped today include Yellowstone National Park;
Mauna
Loa, Hawaii; and Ayers Rock, Australia.
Shuttle Radar Topography Mission
program scientist Dr. Earnest Paylor described
the mission as “a magnificent accomplishment,” noting that
equatorial regions of the
Earth previously unmapped due to constant cloud cover have been mapped
by
SRTM radar. Tom Hennig, SRTM program manager for the National Imagery
and
Mapping Agency, called the success of the mission “absolutely wonderful.”
Tomorrow, Endeavour’s
crew turns its attention to returning home, with landing
scheduled for 3:52 Central Time Tuesday afternoon at the Kennedy Space
Center,
Florida. Check out of the flight control surfaces and orbiter thruster
jets is
scheduled to begin at noon. After the orbiter systems checks are complete,
the
crew will begin stowing the cabin for Tuesday’s landing.
The next status report will
be issued Monday morning upon completion of mast
retraction.
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