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Mon, Apr 13, 2015

OSU Uses Unmanned Aircraft To Take Temperatures Up In The Air

Oregon State University Uses A UAV To Attain Precise Atmospheric Measurements Previously Not Available

For the first time, scientists at Oregon State University are measuring atmospheric temperatures with fiber optic thermometers suspended from unmanned aircraft, combining two emerging technologies to probe a poorly understood swath of Earth’s atmosphere.

With funding from the National Science Foundation, John Selker is buying two new unmanned aerial vehicles (UAVs) to loft sophisticated measuring instruments of his own design into an atmospheric zone that’s been hard to study until now.

“These two technologies together will add orders of magnitude to the precision and resolution of our atmospheric measurements,” said Selker, a hydrologist and professor in OSU’s College of Agricultural Sciences. “We’ll be able to take a continuous slice of data through space and time, getting information that no one has been able to capture before.”

The high-powered thermometers use a fiber-optic cable, similar to that used for telephone and internet communication. By measuring tiny pulses of light zipping along spun-glass strands, the fiber cables capture thousands of temperature readings along their length, detecting differences as slight as 0.01 degree Celsius.

The Earth’s surface and near atmosphere, which is up to about 1,000 meters above the ground, is a critical zone of feedbacks between air, water and earth, Selker said. “It’s where processes interact, where synergies occur. And temperature is a critical driver of these interactions.”

Until now, he said, scientists have had a hard time taking comprehensive measurements of the lower atmosphere.

Selker is a co-director of CTEMPs along with Scott Tyler of the University of Nevada. Wing is director of AirCTEMPs and directs UAV flights at OSU for agriculture, engineering, fish, wildlife and natural resource applications.

The $1.2 million NSF grant renewal will also fund CTEMPs’s purchase of other UAV-mountable instruments, including thermal imaging cameras and a small LIDAR, or laser-powered imaging tool, that captures three-dimensional measurements of landscape features.

(Image of UAV flying over wind generator near Hermiston, OR captured from OSU website.)

FMI: www.oregonstate.edu

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