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Diode-Laser Water-Vapor Sensor for Weather Balloons--Southwest Sciences, Inc., 1570 Pacheco Street, Suite E-11, Santa Fe, NM 87505-3937; 505-984-1322
Dr. Mark Paige, Principal Investigator
Dr. Alan C. Stanton, Business Official
DOE Grant No. DE-FG03-98ER82671
Amount: $750,000
Current water vapor sensors (hygristors and thin film capacitive sensors) used on weather balloons do not provide adequate sensitivity, time response, and reliability, which are needed for this application. Therefore, a new approach is needed for water-vapor sensing on weather balloons, capable of demonstrating high accuracy down to –60°C. This project will develop a new technique utilizing diode-laser, water-vapor sensors for these weather balloons. These sensors provide higher sensitivity and selectivity than current sensors, while still meeting balloon weight restrictions. In Phase I, a prototype, diode-laser, water-vapor sensor was constructed. Digital and analog detection systems were then tested, along with two forms of measurement methodology. The laser sensor demonstrated the sensitivity required for weather balloon meteorological measurements. In Phase II, further prototype development will be addressed, including laser improvement and optical design. Desired specifications for sensitivity, accuracy, weight and operating temperature range will be met.
Commercial Applications and other Benefits as described by the awardee: Applications should include environmental and meteorological sensing, process stream monitoring for the chemical and semiconductor industries, and contrail detection.