Utility of CHF3 as an atmospheric tracer for field tests of advanced passive remote sensing systems

Eyal Agassi

doi:10.1117/12.462370

18 April 2003 Utility of CHF₃ as an atmospheric tracer for field tests of advanced passive remote sensing systems

Eyal Agassi

Proceedings Volume 4882, Remote Sensing of Clouds and the Atmosphere VII; (2003) https://doi.org/10.1117/12.462370
Event: International Symposium on Remote Sensing, 2002, Crete, Greece

Abstract

SF₆ is the most widely used atmospheric tracer in field tests held for performance evaluation of passive remote sensing systems. The most advanced systems are based on 2D arrays of MCT photovoltaic detectors operating in the LWIR (8-12μ) spectral band. Increasing the number of elements in an array is inevitably associated with a decrease in the detector responsivity cutoff wavelength. This might pose a significant difficulty in the use of SF₆ due to its sole narrow absorption band centered at 10.55μ, which falls within a spectral region of poor FPA sensitivity. A search for a more suitable tracer for advanced detector arrays has yielded that Trifluromethane (CHF₃) is the optimal alternative. The paper describes the considerations that led to its selection and surveys its main physical properties, safety, availability and costs. It also presents initial results from a field test that demonstrates its utility.

Citation Download Citation

Eyal Agassi "Utility of CHF₃ as an atmospheric tracer for field tests of advanced passive remote sensing systems", Proc. SPIE 4882, Remote Sensing of Clouds and the Atmosphere VII, (18 April 2003); https://doi.org/10.1117/12.462370

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