 |
| Titel |
Fast and simple model for atmospheric radiative transfer |
| VerfasserIn |
F. C. Seidel, A. A. Kokhanovsky, M. E. Schaepman |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 4 ; Nr. 3, no. 4 (2010-08-25), S.1129-1141 |
| Datensatznummer |
250001225
|
| Publikation (Nr.) |
 copernicus.org/amt-3-1129-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Radiative transfer models (RTMs) are of utmost importance for quantitative
remote sensing, especially for compensating atmospheric perturbation. A
persistent trade-off exists between approaches that prefer accuracy at the
cost of computational complexity, versus those favouring simplicity at the
cost of reduced accuracy. We propose an approach in the latter category,
using analytical equations, parameterizations and a correction factor to
efficiently estimate the effect of molecular multiple scattering. We discuss
the approximations together with an analysis of the resulting performance and
accuracy. The proposed Simple Model for Atmospheric Radiative Transfer
(SMART) decreases the calculation time by a factor of more than 25 in
comparison to the benchmark RTM 6S on the same infrastructure. The relative
difference between SMART and 6S is about 5% for spaceborne and about 10%
for airborne computations of the atmospheric reflectance function. The
combination of a large solar zenith angle (SZA) with high aerosol optical
depth (AOD) at low wavelengths lead to relative differences of up to 15%.
SMART can be used to simulate the hemispherical conical reflectance factor
(HCRF) for spaceborne and airborne sensors, as well as for the retrieval of
columnar AOD. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|