NASA's Airborne Science Program has
unveiled their latest tool for studying Earth's atmosphere - the Northrop
Grumman RQ-4 Global Hawk unmanned aircraft system.
In partnership with Northrop Grumman
and NOAA, NASA's Dryden Flight Research Center located at Edwards Air Force
Base in California formally unveiled the
first of their Global Hawks in a Thursday ceremony.
The fully autonomous aircraft can
carry a 2,000-pound (907-kg) science payload at 65,000 feet (19,812 meters) on
a flight lasting over 30 hours without refueling. Two pre-production RQ-4s, the
first and sixth built (designated AV-1 and AV-6) were transferred to NASA in
the fall of 2007, and AV-6 is undergoing final preparations to begin its
scientific career in about 10 weeks.
NASA Dryden Director Kevin Petersen
termed the aircraft and its capabilities a "paradigm shift in airborne science
capabilities", providing "unprecedented earth sciences opportunities."
Under the five-year Space Act
Agreement, NASA and NG will jointly operate the aircraft. A number of NASA
facilities will be involved, with Dryden operating the aircraft and Ames
Research Center providing technical support and equipment. Goddard Space Flight
Center scientists helped define mission objectives as well as built some of the
sensors the aircraft will carry, and the Marshall Space Flight Center will
provide real-time mission monitoring and communications with the science
payloads.
NOAA is also involved as a partner,
and has a strong interest in using the
Global Hawk for the study of hurricanes, flying the UAV into storms that
are too dangerous for manned aircraft. NOAA Project Scientist Dr. David Fahey
described the use of the RQ-4 to study hurricanes as "the big prize", although
he indicated that scientific use of the aircraft is primarily being limited at
this point by funding, as the technology is so new. "Financially, there's a
struggle to do what we want to do, when we want to do it with this program.
There isn't somebody throwing money at it. Its progress is being measured, or
limited, by the available funding," said Fahey.
After several initial aircraft and
equipment checkout flights which will take place in the Edwards area, AV-6's
first science program, Global Hawk Pacific 2009, or GloPac,
will get under way this spring. For the six-flight program, twelve
one-of-a-kind atmospheric science sensors will be mounted on the RQ-4 in place
of its previous
military surveillance payload and flown over the Pacific and Arctic oceans.
According to NASA, GloPac will use the aircraft to validate instruments
onboard NASA's Aura Earth Observing System satellite, as
well as to explore "trace gases, aerosols and dynamics of remote upper
troposphere/lower stratosphere regions." On another of the GloPac
flights, the Global Hawk will be flown from the North Pole down to
the equator and back twice in order to obtain atmosphere samples from vastly
distant areas all on the same day, a task only made possible by the aircraft's
long endurance.
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