Measuring the rarified air

Cessna Citation II research jet

UND’s Cessna Citation research jet testing new sensor for private industry partner

By Kate Menzies, University & Public Affairs student writer

With an operating ceiling of more than 43,000 feet, the University of North Dakota’s Cessna Citation research jet can really soar!

Having the ability to fly about 10,000 feet higher than commercial airlines typically fly, the Citation Research Aircraft has an up close look at the clouds, and the physics behind them.

When private industry partner Ophir Corp., a Colorado-based subcontractor to major U.S. Aerospace corporations, wanted to test its latest instrument, the Optical Air Data Sensor, they chose UND. They came to the right place, as UND is the only public university that owns and operates a research jet.

“If you want to test or develop an instrument, the Cessna serves as a platform,” said Dr. David Delene, a UND Atmospheric Sciences faculty member who specializes in atmospheric research.

The aircraft, owned and operated by the UND Department of Atmospheric Sciences, is equipped with several instruments used to measure atmospheric properties.

The Optical Air Data Sensor, created by Ophir Corporation, is being installed and tested this summer over a targeted range of conditions in a series of dedicated Citation flights. The Optical Air Data Sensor uses laser beam reflections from particles to characterize the air flow around the aircraft.

The sensor measures airflow in three dimensions approximately a meter away from the aircraft. At the same time, the Citation measures atmospheric winds, temperature, pressure, true air speed, angle of attack and angle of sideslip.

In an initial test by the NASA Glenn Icing Research Tunnel, the sensor was able to provide accurate information in clear, as well as icing conditions.

This sensor will be advantageous to commercial as well as military aircraft by being able to produce accurate data in poor weather conditions.

Companies, such as Ophir, fund jet testing to try out their instruments, while UND provides the aircraft, flies with the prototype, provides high-quality atmospheric measurements and does post-flight analysis.

UND’s Cessna Citation II aircraft also measures aerosols and state-of-the-atmosphere conditions over the range of flight conditions typically encountered by commercial and general aviation aircraft.

Although the jet does sample aerosols from storm clouds, it does not fly through any conditions a commercial aircraft won’t fly through.

Instrument testing takes place year-round and all over the world. Students in the UND Atmospheric Sciences program have the ability to ride in the jet and observe first-hand how instruments are tested.

Delene emphasized how the Cessna Citation is not reserved only for Atmospheric Science majors. In fact, departments such as space studies, chemistry and chemical engineering are collaborating on Citation research projects.

UND Atmospheric Sciences has operated the Cessna Citation since the early 1970’s and has been continuously improving the aircraft to provide top-notch research opportunities for companies and students.

Contact:
David L. Dodds
Media Relations/Writer & Editor
Office of University Relations
264 Centennial Drive Stop 7144
Grand Forks, ND 58202-7144
701.777.5529 | 701.777.4616 fax
david.dodds@UND.edu
www.UND.edu

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