Development of a near-infrared balloon-borne camera for dayside and sunlit auroral observations
| Autor: | X. Zhou, S. Gunapala, Y.-T. He, Dirk Lummerzheim, S. B. Rafol, Randy Gladstone, Don L. Hampton |
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| Rok vydání: | 2017 |
| Předmět: |
Brightness
010504 meteorology & atmospheric sciences Near-infrared spectroscopy 01 natural sciences Space exploration Atmosphere Wavelength Geophysics Altitude Space and Planetary Science Sky brightness 0103 physical sciences Environmental science Daylight 010303 astronomy & astrophysics 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Journal of Geophysical Research: Space Physics. 122:4543-4552 |
| ISSN: | 2169-9380 |
| Popis: | Imaging aurora in daylight is a difficult and challenging task. The brightness of the sunlit atmosphere overwhelms the auroral emissions at visible wavelengths. Modeling of atmospheric brightness suggests that the contrast between auroral brightness and sky brightness makes it possible to image the aurora at near infrared (NIR) wavelengths from sufficient altitudes. Preliminary experiments confirmed that the auroral N2+ Meinel emissions at about 1100 nm are bright enough to be extracted from atmospheric background brightness during daylight at about 40 km of a balloon altitude, which lead to the development of a high-performance NIR InGaAs camera that can be flown on a high-altitude and long-duration balloon. Auroral observations from such a platform are highly accommodated to current space missions (such as THEMIS/ARTEMIS, MMS, Cluster, Geotail, DMSP) and many ground-based measurements and will enhance the science return significantly. |
| Databáze: | OpenAIRE |
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