[Maryschild]

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I♥ J.M.J.

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NASA Weekly Digest Bulletin. . . Sunday, October 19, 2014 11:22 AM

From: "NASA News Services" <nasa_subscriptions@service.govdelivery.com>
. .To: _________________
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Wiseman and Wilmore Spacewalk Preparations
10/15/2014 12:00 PM EDT
http://www.nasa.gov/content/wiseman-and ... parations/

Flight Engineers Reid Wiseman (right) and Barry Wilmore
spent most of the day on Tuesday, Oct. 14 completing
preparations for their 6 ½-hour Oct. 15 spacewalk. The
two astronauts set up their spacesuits and tools in the
equipment lock of the Quest airlock. Flight Engineer
ion, joined Wiseman and Wilmore for a review of
spacewalk procedures.

During today’s spacewalk, the astronauts will venture
out to the starboard truss of the station to remove
and replace a power regulator known as a sequential -
walkers also will move TV and camera equipment in
preparation for the relocation of the Leonardo Permanent
Multipurpose Module to accommodate the installation of
new docking adapters for future commercial crew vehicles.

This photo was taken on Oct. 1, 2014.
Image Credit: NASA

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Operation IceBridge Turns Five
10/16/2014 12:00 PM EDT
http://www.nasa.gov/content/operation-i ... urns-five/


In May 2014, two new studies concluded that a section of the
land-based West Antarctic ice sheet had reached a point of
inevitable collapse. Meanwhile, fresh observations from
September 2014 showed sea ice around Antarctica had reached
its greatest extent since the late 1970s.
http://www.nasa.gov/content/goddard/ant ... d-maximum/

To better understand such dynamic and dramatic differences in
the region's land and sea ice, researchers are travelling south
to Antarctica this month for the sixth campaign of NASA’s
Operation IceBridge. The airborne campaign, which also flies
each year over Greenland, makes annual surveys of the ice with
instrumented research aircraft.

Instruments range from lasers that map the elevation of the
ice surface, radars that "see" below it, and downward looking
cameras to provide a natural-color perspective. The Digital
Mapping System (DMS) camera acquired the above photo
during the mission’s first science flight on October 16, 2009.
At the time of the image, the DC-8 aircraft was flying at an
altitude of 515 meters (1,700 feet) over heavily compacted
first-year sea ice along the edge of the Amundsen Sea.

Since that first flight, much has been gleaned from IceBridge
data. For example, images from an IceBridge flight in October
2011 revealed a massive crack running about 29 kilometers
(18 miles) across the floating tongue of Antarctica's Pine
Island Glacier. The crack ultimately led to a 725-square-
kilometer (280-square-mile) iceberg.

In 2012, IceBridge data was a key part of a new map of Antarc-tica
called Bedmap2. By combining surface elevation, ice thickness,
and bedrock topography, Bedmap2 gives a clearer picture of
Antarctica from the ice surface down to the land surface. Discoveries
have been made in Greenland, too, including the identification of a
740-kilometer-long (460-mile-long) mega canyon below the ice sheet.

Repeated measurements of land and sea ice from aircraft extend the
record of observations once made by NASA’s Ice, Cloud, and Land
Elevation Satellite, or ICESat, which stopped functioning in 2009.
In addition to extending the ICESat record, IceBridge also sets the
stage for ICESat-2, which is scheduled for launch in 2017.

> NASA's Earth Observatory: Operation IceBridge Turns Five
http://earthobservatory.nasa.gov/IOTD/view.php?id=84549

Image Credit: IceBridge DMS L0 Raw Imagery courtesy of the
Digital Mapping System (DMS) team/NASA DAAC at the National
Snow and Ice Data Center.
Caption: Kathryn Hansen:
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Hurricane Gonzalo Viewed From the International Space Station
10/17/2014 12:00 PM EDT
http://www.nasa.gov/content/hurricane-g ... nal-space-
station/

This image of Hurricane Gonzalo was taken from the International
Space Station by European Space Agency astronaut Alexander Gerst
on Oct. 16, 2014. In addition to the crew Earth observations from
the space station, NASA and NOAA satellites have been providing
continuous coverage of Hurricane Gonzalo as it moves toward Bermuda.

> NASA Hurricane: Gonzalo (Atlantic Ocean)

Image Credit: Alexander Gerst/ESA/NASA


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Peace and Love
♥ Sandy
(Maryschild)