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 October 17, 2014

M4/M9 Firing Range closure The Edwards AFB Combat Arms Firing Range is closed for M4 and M9 firing until further notice. Any required firing for PCS or deployments will temporarily be accomplished at March ARB, Calif. To schedule training, contact the Combat Arms section at 661-277-2103. It is strongly recommended that all firing be scheduled as soon...
 
 
unity

The beauty of unity

Air Force graphic by Staff Sgt. Benjamin W. Stratton What do cheeseburgers, musical groups, sports teams and the United States of America have in common? If you said “the letter ‘s,’ you’re right, but th...
 
 

Up-and-coming awards

2015 Cooke award nominations sought JOINT BASE SAN ANTONIO-RANDOLPH, Texas – Air Force officials are seeking nominations for the 11th Annual Department of Defense David O. Cooke Excellence in Public Administration Award. This award was created to promote, perpetuate and recognize the type of exceptional contributions David O. Cooke made to the federal service. He...
 

 
Courtesy graphic

AF releases criteria for new service medal

Courtesy graphic Graphic of the Nuclear Deterrence Operations Service Medal. WASHINGTON - Air Force officials released nomination criteria for the new Nuclear Deterrence Operations Service Medal, following Secretary of the Air...
 
 

Undergrad flying training applications due in December

JOINT BASE SAN ANTONIO-RANDOLPH, Texas – The 2015 undergraduate flying training selection board originally scheduled for Jan. 20-23 will now convene Feb. 17-20 and associated application suspenses have shifted by approximately a month, Air Force Personnel Center officials said Oct. 10. Eligible active duty officers interested in undergraduate flying training must apply by Dec. 19...
 
 
Air Force photograph by Rebecca Amber

Bunch encourages one enterprise mindset at commanders call

Air Force photograph by Rebecca Amber Maj. Gen. Arnold Bunch Jr., Air Force Test Center commander, discussed his six strategic goals for the test center at a commanders call Oct. 14 in the base theater. Maj. Gen. Arnie Bunch, A...
 




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>