Dr. Tim Kroeger, professor of environmental, earth and space studies at Bemidji State University, was joined by BSU students Jeanice Ess, Sharmila Nowrang, Steven Ess and Engress Clark in Ada, Minn., for a high-altitude balloon launch on April 4.

The balloon reached approximately 80,000 feet and carried sensors recording temperature, relative humidity, air pressure and ozone before coming down 120 miles southeast in Long Prairie, Minn. Dr. John Truedson, professor of physics, also had instruments on board that measured ultraviolet light intensity, radiation, temperature and a three-axis accelerometer.

Science instructors and students from Bemidji Middle School joined the BSU scientists on the expedition, adding their own experiments to the balloon.