10–14 Nov 2019
Europe/Vienna timezone

Updated long-term infrasound sensor comparison results and application to I53US and US IMS arrays

Not scheduled
Oral Measurement Systems

Speaker

David Fee (Defense Threat Reduction Agency, Nuclear Arms Control Technology Program)

Description

Comparison of infrasound sensor responses from field-based testing at the Sandia National Labs FACT site has revealed notable deviations from lab-based calibrations under standard conditions of temperature and pressure. All sensors tested have exhibited ​amplitude variations occurring on both long-term (months) and short-term (diurnal) timescales. Here we present results from continued field testing over the past year, including the response of five infrasound sensors (two MB3a’s, a Hyperion IFS-5100, a Chaparral M64LN, and a Chaparral M64Plus) connected to a single port to the atmosphere, as well as internal and external temperature, humidity, and absolute pressure sensors. We examine the sensor response and performance as a function of time and compare it to lab-based calibrations and environmental conditions. As a result of this testing, the U.S. is in the process of replacing the Chaparral 50A at US IMS arrays and installing a reference sensor at each element. We will present the installation and testing of the replacement Hyperion sensors at I53US and how the reference sensors will be implemented and used.

Primary author

David Fee (Defense Threat Reduction Agency, Nuclear Arms Control Technology Program)

Presentation materials

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