NASA

August 24, 2012

Two hurricane Global Hawks, two sets of instruments

NASA’s Hurricane Severe Storm Sentinel Mission, or HS3, will be studying hurricanes at the end of the summer, and there will be two high-altitude, long-duration unmanned aircraft with different instruments flying over the storms.

The unmanned aircraft, dubbed “severe storm sentinels,” are operated by pilots located in ground control stations at NASA’s Wallops Flight Facility in Wallops Island, Va., and NASA’s Dryden Flight Center on Edwards Air Base, Calif. The NASA Global Hawk is well-suited for hurricane investigations because it can over-fly hurricanes at altitudes greater than 60,000 feet with flight durations of up to 28 hours.

Technicians prepare to install the High-Altitude Imaging Wind and Rain Profiler, or HIWRAP, on the underside of a NASA Global Hawk. HIWRAP is one of the science instruments being carried by the remotely operated high-altitude aircraft during the Hurricane and Severe Sentinel missions.

Using unmanned aircraft has many advantages. Hurricanes present an extreme environment that is difficult to sample. They cover thousands of square miles in area, and can also extend up to 50,000 feet in altitude. Second, they involve very high winds, turbulence and heavy precipitation. Third, ground conditions (high winds that create heavy seas or blowing material) make surface observations difficult.

“Several NASA centers are joining federal and university partners in the Hurricane and Severe Storm Sentinel airborne mission targeted to investigate the processes that underlie hurricane formation and intensity change in the Atlantic Ocean basin,” said Scott Braun, principal investigator for the HS3 Mission and research meteorologist at NASA’s Goddard Space Flight Center in Greenbelt, Md.

Two NASA Global Hawks that will be flying during the HS3 mission. Each will have different payloads, or collections of instruments aboard. Necessary observations are winds, temperature, humidity (water), precipitation, and aerosol (particle) profiles from the surface to the lower stratosphere.

NASA Goddard’s Lihau Li, left, and Gerry Heymsfield adjust the High-Altitude Imaging Wind and Rain Profiler prior to its installation on NASA’s Global Hawk for the upcoming hurricane study.

The first Global Hawk payload, installed in aircraft No. 872, will consist of three instruments. That payload is for sampling the environment that hurricanes are embedded within. A laser system called Cloud Physics Lidar developed at NASA Goddard will be located in the Global Hawk’s nose. CPL measures cloud structure and aerosols such as dust, sea salt particles, smoke particles by bouncing laser light off of those particles and clouds. An infrared instrument called the Scanning High-resolution Interferometer Sounder or S-HIS from the University of Wisconsin in Madison, will be located in the belly of the Global Hawk. It can be used to remotely measure or remotely sense the temperature and water vapor vertical profile along with the sea surface temperature and some cloud properties. A dropsonde system from the National Center for Atmospheric Research and National Oceanic and Atmospheric Administration will be located in the tail of the aircraft. The dropsonde system ejects small sensors tied to parachutes that drift down through the storm measuring winds, temperature and humidity.

Global Hawk No. 871 will also carry a payload of three instruments. That Global Hawk’s prime responsibility is to sample the cores of hurricanes. A microwave system called the High-Altitude MMIC Sounding Radiometer or HAMSR, created by NASA’s Jet Propulsion Laboratory in Pasadena, Calif., will be located in the aircraft’s nose. HAMSR measures temperature, water vapor, and vertical precipitation profiles.

NASA’s Global Hawk No. 871 cruises over low cloud layers above the Dryden Flight Research Center on Edwards Air Force Base, Calif. This was the first Global Hawk built in the original Advanced Concept Technology Demonstration program, joining NASA’s other Global Hawk, No. 872, for high-altitude, long-endurance environmental science missions.

A radar system called the High-altitude Imaging Wind & Rain Airborne Profiler or HIWRAP from NASA Goddard will be located in the second (No. 871) Global Hawk’s belly. It is similar to a ground radar system but pointed downward. HIWRAP measures cloud structure and winds. The Hurricane Imaging Radiometer (HIRAD) from NASA’s Marshall Space Flight Center in Huntsville, Ala., will be located in the aircraft’s tail section. HIRAD measures microwave radiation emitted from the surface and atmosphere. The HIRAD observations yield surface wind speeds and rain rates.

Both Global Hawks will be flying out of NASA Wallops Flight Facility in September, the peak month for the Atlantic Hurricane Season.

 




All of this week's top headlines to your email every Friday.


 
 

 

News Briefs July 25, 2014

Focus group Here’s your chance to be heard. The Edwards Commissary is looking for volunteers to participate in a group discussion about your Commissary. They will be conducting focus groups July 29 from noon to 2 p.m. and again from 2:30 p.m. to 4 p.m. If you would like to participate, send an e-mail to...
 
 
aafes-school

Exchange moves to the head of the class with extra back-to-school savings

With the first bell about to ring on a new school year, the Army & Air Force Exchange Service is giving lessons in savings. The Exchange is helping military shoppers make the grade with competitive prices and tax savings on...
 
 
Air Force photograph by Kenji Thuloweit

Major wins major bucks on ‘Price Is Right’

Air Force photograph by Kenji Thuloweit Maj. Kevin Van Stone, Air Force Operational Test and Evaluation Center Detachment 5, and his wife, Melinda (right), speak to a representative from CBS after being handed a giant check for...
 

 
NASA photograph by Tom Tschida

NASA Armstrong Support Center receives LEED platinum certification

NASA photograph by Tom Tschida Large expanses of windows and curved rooflines highlight NASA Armstrong’s new Facilities Support Center. The 38,000-square-foot structure has been certified that it met the Leadership in Ene...
 
 

Exchange shoppers can keep on ticking with Hello Kitty sweepstakes

Military shoppers can keep time with Hello Kitty thanks to the latest sweepstakes from the Army & Air Force Exchange Service. Twenty-five winners will take home a Hello Kitty watch, valued at $85. From July 25 to Aug. 22, Exchange shoppers can enter to win by emailing patriotfamily@aafes.com and putting “Hello Kitty Sweepstakes” in the...
 
 

Leadership Lessons: Who would you follow?

GRAND FORKS AIR FORCE BASE, N.D.†-†Over the last year I have enjoyed reading articles from our wing leadership on their perspectives and experiences which have made them better leaders. I have great admiration for their words of wisdom and have benefited from their shared experiences. When I was asked to write a leadership piece I...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>