Predicting top-of-atmosphere radiance for arbitrary viewing geometries from the visible to thermal infrared II

Christopher J. Florio

doi:10.1117/12.2669106

3 October 2023 Predicting top-of-atmosphere radiance for arbitrary viewing geometries from the visible to thermal infrared II

Christopher J. Florio

Author Affiliations +

Proceedings Volume 12691, Laser Communication and Propagation through the Atmosphere and Oceans XII; 1269104 (2023) https://doi.org/10.1117/12.2669106
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

In 2010, we [Cota et al., Proc. SPIE 7013, 1-14 (2010)] described how The Aerospace Corporation’s Parameterized Image Chain Analysis & Simulation SOftware (PICASSO) may be used with “with a limited number of runs of AFRL’s MODTRAN4 radiative transfer code, to quickly predict the top-of-atmosphere (TOA) radiance received by an earth viewing sensor, for any arbitrary combination of solar and sensor elevation angles.” More specifically, the 2010 paper detailed the extension of “the method to the short and midwave IR, where reflected solar and emitted thermal radiation both contribute to the TOA radiance received by a downlooking sensor.” In the decade since publication, we have developed a series of updates, to improve both fidelity and robustness, whilst maintaining consistency. First, the functional form of the TOA radiance equation has been modified, in order to provide users with more degrees of freedom in modeling solar contributions, without significantly increasing the overall number of terms. Secondly, we’ve provided an alternate formulation of terms, which utilizes an additional iteration of MODTRAN to produce higher fidelity results, in some opaque bandpasses and for some collection geometries. Finally, our methodology is now applicable with the latest version of MODTRAN (6), including all of the syntax changes involved therein.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Christopher J. Florio "Predicting top-of-atmosphere radiance for arbitrary viewing geometries from the visible to thermal infrared II", Proc. SPIE 12691, Laser Communication and Propagation through the Atmosphere and Oceans XII, 1269104 (3 October 2023); https://doi.org/10.1117/12.2669106

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