Stokes resolved differential temperature: an important metric of polarimetric precision in the long-wave infrared

Kira A. Hart Shanks; Russell A. Chipman; Dong L. Wu; Meredith K. Kupinski

doi:10.1117/12.2595428

1 August 2021 Stokes resolved differential temperature: an important metric of polarimetric precision in the long-wave infrared

Kira A. Hart Shanks, Russell A. Chipman, Dong L. Wu, Meredith K. Kupinski

Author Affiliations +

Proceedings Volume 11833, Polarization Science and Remote Sensing X; 118330I (2021) https://doi.org/10.1117/12.2595428
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

In remote sensing, radiometric measurements taken in the mid-wave infrared and beyond (λ > 3μm) are commonly reported in units of Kelvin by utilizing Planck's radiation law to relate measured radiance and target brightness temperature (T_b). Thus, it is desirable to match this formalism in thermal polarimetry and report the unnormalized Stokes parameters in units of K instead of radiance (Wm^-2sr^-1). This approach also allows common performance metrics in long-wave infrared (LWIR) imaging such as Noise Equivalent Differential Temperature (NEDT) to be modified and extended to metrics of polarimetric accuracy and precision. However, since the relationship between measured radiance and T_b are non-linear, the conversion of I, Q, and U in units of radiance to T_b, T_b,Q, and T_b,U in K is ambiguous. As a solution a metric of performance for thermal linear Stokes polarimetry, the Stokes resolved differential temperature (SRDT), is introduced.

Conference Presentation

Citation Download Citation

Kira A. Hart Shanks, Russell A. Chipman, Dong L. Wu, and Meredith K. Kupinski "Stokes resolved differential temperature: an important metric of polarimetric precision in the long-wave infrared", Proc. SPIE 11833, Polarization Science and Remote Sensing X, 118330I (1 August 2021); https://doi.org/10.1117/12.2595428

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