Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation

Luca Schifano; Lien Smeesters; Francis Berghmans; Steven Dewitte

doi:10.3390/s21134444

Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation

Luca Schifano, Lien Smeesters, Francis Berghmans, Steven Dewitte

Onderzoeksoutput: Article › peer review

7 Citaten (Scopus)

151 Downloads (Pure)

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The measurement of the Earth's Outgoing Longwave Radiation plays a key role in climate change monitoring. This measurement requires a compact wide-field-of-view camera, covering the 8-14 m wavelength range, which is not commercially available. Therefore, we present a novel thermal wide-field-of-view camera optimized for space applications, featuring a field of view of 140° to image the Earth from limb to limb, while enabling a high spatial resolution of 4.455 km at nadir. Our cost-effective design comprises three germanium lenses, of which only one has a single aspherical surface. It delivers a very good image quality, as shown by the nearly-diffraction-limited performance. Radiative transfer simulations indicate excellent performance of our camera design, enabling an estimate of the broadband Outgoing Longwave Radiation with a random relative error of 4.8%.

Originele taal-2	English
Artikelnummer	4444
Pagina's (van-tot)	1-15
Aantal pagina's	15
Tijdschrift	Sensors
Volume	21
Nummer van het tijdschrift	13
DOI's	https://doi.org/10.3390/s21134444
Status	Published - jul. 2021

Bibliografische nota

Funding Information:
Acknowledgments: B-PHOT acknowledges the Vrije Universiteit Brussel’s Methusalem foundations as well as the Hercules Programme of the Research Foundation Flanders (FWO).

Funding Information:
Funding: This research was funded by the Solar-Terrestrial Center of Excellence (STCE).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

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10.3390/s21134444Licentie: CC BY

2021 - L. Schifano - Wide-field-of-view longwave camera for the characterization of the earth's outgoing longwave radiationFinal published version, 1,7 MBLicentie: CC BY

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abstract = "The measurement of the Earth's Outgoing Longwave Radiation plays a key role in climate change monitoring. This measurement requires a compact wide-field-of-view camera, covering the 8-14 m wavelength range, which is not commercially available. Therefore, we present a novel thermal wide-field-of-view camera optimized for space applications, featuring a field of view of 140° to image the Earth from limb to limb, while enabling a high spatial resolution of 4.455 km at nadir. Our cost-effective design comprises three germanium lenses, of which only one has a single aspherical surface. It delivers a very good image quality, as shown by the nearly-diffraction-limited performance. Radiative transfer simulations indicate excellent performance of our camera design, enabling an estimate of the broadband Outgoing Longwave Radiation with a random relative error of 4.8%.",

keywords = "Earth Energy Imbalance; Earth Radiation Budget; Outgoing Longwave Radiation; aspherical optical design; radiative transfer simulations; refractive imaging system; space instrumentation; wide field of view",

author = "Luca Schifano and Lien Smeesters and Francis Berghmans and Steven Dewitte",

note = "Funding Information: Acknowledgments: B-PHOT acknowledges the Vrije Universiteit Brussel{\textquoteright}s Methusalem foundations as well as the Hercules Programme of the Research Foundation Flanders (FWO). Funding Information: Funding: This research was funded by the Solar-Terrestrial Center of Excellence (STCE). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

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doi = "10.3390/s21134444",

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AU - Dewitte, Steven

N1 - Funding Information: Acknowledgments: B-PHOT acknowledges the Vrije Universiteit Brussel’s Methusalem foundations as well as the Hercules Programme of the Research Foundation Flanders (FWO). Funding Information: Funding: This research was funded by the Solar-Terrestrial Center of Excellence (STCE). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

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N2 - The measurement of the Earth's Outgoing Longwave Radiation plays a key role in climate change monitoring. This measurement requires a compact wide-field-of-view camera, covering the 8-14 m wavelength range, which is not commercially available. Therefore, we present a novel thermal wide-field-of-view camera optimized for space applications, featuring a field of view of 140° to image the Earth from limb to limb, while enabling a high spatial resolution of 4.455 km at nadir. Our cost-effective design comprises three germanium lenses, of which only one has a single aspherical surface. It delivers a very good image quality, as shown by the nearly-diffraction-limited performance. Radiative transfer simulations indicate excellent performance of our camera design, enabling an estimate of the broadband Outgoing Longwave Radiation with a random relative error of 4.8%.

AB - The measurement of the Earth's Outgoing Longwave Radiation plays a key role in climate change monitoring. This measurement requires a compact wide-field-of-view camera, covering the 8-14 m wavelength range, which is not commercially available. Therefore, we present a novel thermal wide-field-of-view camera optimized for space applications, featuring a field of view of 140° to image the Earth from limb to limb, while enabling a high spatial resolution of 4.455 km at nadir. Our cost-effective design comprises three germanium lenses, of which only one has a single aspherical surface. It delivers a very good image quality, as shown by the nearly-diffraction-limited performance. Radiative transfer simulations indicate excellent performance of our camera design, enabling an estimate of the broadband Outgoing Longwave Radiation with a random relative error of 4.8%.

KW - Earth Energy Imbalance; Earth Radiation Budget; Outgoing Longwave Radiation; aspherical optical design; radiative transfer simulations; refractive imaging system; space instrumentation; wide field of view

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Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation

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