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NASA NTRS · 20240007111

A Portable Nitrogen Dioxide Instrument Using Cavity-Enhanced Absorption Spectroscopy

Steven A Bailey·Reem A Hannun·Andrew K Swanson·Thomas F Hanisco
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Abstract

The Portable (2.7 kg) Cavity-enhanced Absorption of Nitrogen Dioxide (PCAND) instrument for measuring in situ nitrogen dioxide (NO2) was developed using incoherent, broadband cavity-enhanced absorption spectroscopy (IBBCEAS). An LED light source centered at 408 nm was coupled to a cavity 15 cm in length, achieving an effective optical pathlength of ~520 m. Our precision was measured as 94 pptv (1 s). To date, we have flown this instrument on 3 balloon and 1 UAV test flights. This instrument records data to an SD card and outputs data (via an RS232 port) to external devices including a commercial radiosonde (iMet) for real-time data downlink.

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TROPOMIVertical ProfileAbsorptionTroposphereIBBCEASNO2PCAND

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Steven A Bailey, Reem A Hannun, Andrew K Swanson, Thomas F Hanisco. 2024-10-08. A Portable Nitrogen Dioxide Instrument Using Cavity-Enhanced Absorption Spectroscopy. https://ntrs.nasa.gov/citations/20240007111

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