Colour remote sensing of the impact of artificial light at night (II): Calibration of DSLR-based images from the International Space Station

REMOTE SENSING OF ENVIRONMENT

卷:264

Article

de Miguel, Alejandro Sanchez^1,2,3,4  Zamorano, Jaime²  Aube, Martin³  Bennie, Jonathan⁵  Gallego, Jesus²  Ocana, Francisco^2,6  Pettit, Donald R.⁷  Stefanov, William L.⁸  Gaston, Kevin J.¹ 

[1] Univ Exeter, Environm & Sustainabil Inst, Penryn TR10 9FE, Cornwall, England

[2] Univ Complutense, Inst Fis Particulas & Cosmos IPARCOS, Dept Fis Tierra & Astrofis, Madrid, Spain

[3] CEGEP Sherbrooke, Dept Phys, Sherbrooke, PQ J1E 4K1, Canada

[4] Inst Astrofis Andalucia, Glorieta Astron, S-N, Granada 18008, Spain

[5] Univ Exeter, Ctr Geog & Environm Sci, Penryn TR10 9FE, Cornwall, England

[6] Quasar SR ESA, European Space Astron Ctr, E-28691 Villanueva De La Canada, Spain

[7] NASA Lyndon B Johnson Space Ctr, Flight Operat Directorate, Astronaut Off, Houston, TX 77058 USA

[8] NASA Lyndon B Johnson Space Ctr, Explorat Integrat & Sci Directorate, Astromat Res & Explorat Sci Div, Explorat Sci Off, Houston, TX 77058 USA

关键词: Artificial lighting;    Light pollution;    Night;    Remote sensing;    Urban;   

DOI  :  10.1016/j.rse.2021.112611

来源: Elsevier

【 摘 要 】

Nighttime images taken with DSLR cameras from the International Space Station (ISS) can provide valuable information on the spatial and temporal variation of artificial nighttime lighting on Earth. In particular, this is the only source of historical and current visible multispectral data across the world (DMSP/OLS and SNPP/VIIRSDNB data are panchromatic and multispectral in the infrared but not at visible wavelengths). The ISS images require substantial processing and proper calibration to exploit intensities and ratios from the RGB channels. Here we describe the different calibration steps, addressing in turn Decodification, Linearity correction (ISO dependent), Flat field/Vignetting, Spectral characterization of the channels, Astrometric calibration/georeferencing, Photometric calibration (stars)/Radiometric correction (settings correction by exposure time, ISO, lens transmittance, etc) and Transmittance correction (window transmittance, atmospheric correction). We provide an example of the application of this processing method to an image of Spain.

【 授权许可】

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