Wide-Field-of-View Longwave Camera for the Characterization of the Earth’s Outgoing Longwave Radiation
| Autor: | Francis Berghmans, Luca Schifano, Lien Smeesters, Steven Dewitte |
|---|---|
| Přispěvatelé: | Applied Physics and Photonics, Faculty of Engineering, IR Academic Unit |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Earth Energy Imbalance
Earth Radiation Budget Outgoing Longwave Radiation aspherical optical design radiative transfer simulations refractive imaging system space instrumentation wide field of view 010504 meteorology & atmospheric sciences Earth Planet Radio Waves Climate Change 0211 other engineering and technologies Field of view 02 engineering and technology TP1-1185 01 natural sciences Biochemistry Article Analytical Chemistry Thermal Broadband Nadir Radiative transfer Electrical and Electronic Engineering Instrumentation Image resolution 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing Physics Chemical technology Longwave Atomic and Molecular Physics and Optics Outgoing longwave radiation |
| Zdroj: | Sensors Volume 21 Issue 13 Sensors, Vol 21, Iss 4444, p 4444 (2021) Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s21134444 |
| Popis: | 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 µm 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%. |
| Databáze: | OpenAIRE |
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