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| Titel |
Atmospheric correction of thermal-infrared imagery of the 3-D urban environment acquired in oblique viewing geometry |
| VerfasserIn |
F. Meier, D. Scherer, J. Richters, A. Christen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 5 ; Nr. 4, no. 5 (2011-05-20), S.909-922 |
| Datensatznummer |
250001983
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| Publikation (Nr.) |
 copernicus.org/amt-4-909-2011.pdf |
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| Zusammenfassung |
| This research quantifies and discusses atmospheric effects, which alter the
radiance observed by a ground-based thermal-infrared (TIR) camera. The TIR
camera is mounted on a boom at a height of 125 m above ground on top of a
high-rise building in the city of Berlin, Germany (52.4556° N,
13.3200° E) and observes the Earth's surface. The study shows that atmospheric
correction of TIR imagery of the three-dimensional (3-D) urban environment
acquired in oblique viewing geometry has to account for spatial variability
of line-of-sight (LOS) geometry. We present an atmospheric correction
procedure that uses these spatially distributed LOS geometry parameters, the
radiative transfer model MODTRANTM5.2 and atmospheric profile data
derived from meteorological measurements in the field of view (FOV) of the
TIR camera. The magnitude of atmospheric effects varies during the analysed
24-hourly period (6 August 2009) and is particularly noticeable for surfaces
showing a strong surface-to-air temperature difference. The differences
between uncorrected and corrected TIR imagery reach up to 6.7 K at 12:00.
The use of non-spatially distributed LOS parameters leads to errors of up to
3.7 K at 12:00 and up to 0.5 K at 24:00. |
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