Ozone Sensors Payload on NASA- High Altitude Student Platform (HASP) Balloon Flights.

University of North Florida (UNF) and University of North Dakota (UND) team have successfully flown ozone sensors payloads on the NASA-High Altitude Student Platform (HASP) balloon flights and measured the ozone gas profile in the stratosphere every year since 2008. The ozone sensor payload on HASP 2017 balloon flight consisted of three different types of nanocrystalline thin film gas sensor arrays, one pressure sensor, three temperature sensors, three miniature heaters, three ultra violet photodiodes, one GPS and microcontroller circuit board. Each gas sensor array has eight thin-film ozone gas sensors. Ozone sensor arrays were fabricated, tested and calibrated at University of North Florida. An ultra violet photodiode was mounted just below the ozone gas sensors box in order to measure the amount of photo-voltage generated by UV light. The payload met the specified design criteria of HASP and was successfully integrated for communications and successfully cleared thermal vacuum testing at the NASA-Columbia Scientific Balloon Facility (CSBF) in Palestine, TX during the first week of August 2017, and was certified for the balloon flight. The payload was launched into the stratosphere at an altitude of 120,000 feet from the NASA-Columbia Scientific Balloon Facility, Fort Sumner, NM on September 4, 2017 at 14:04 UTC. The flight was terminated and impacted on September 5, 2017 at 3:44 UTC. This flight had a total flight duration of 13 hours and 40 minutes. The sensors payload measured ozone gas during the flight and sent a 25 KB data file every 15 minutes. The data analysis confirmed that all sensors worked successfully and measured the ozone gas profile in the stratosphere. After termination of the balloon flight, the payload was recovered in the good working condition. Results of the HASP 2017 flight will be presented.