 |
| Titel |
Retrieving aerosol height from the oxygen A band: a fast forward operator and sensitivity study concerning spectral resolution, instrumental noise, and surface inhomogeneity |
| VerfasserIn |
A. Hollstein, J. Fischer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 5 ; Nr. 7, no. 5 (2014-05-22), S.1429-1441 |
| Datensatznummer |
250115765
|
| Publikation (Nr.) |
 copernicus.org/amt-7-1429-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Hyperspectral radiance measurements in the oxygen A band are sensitive to the
vertical distribution of atmospheric scatterers, which in principle allows
the retrieval of aerosol height from future instruments like TROPOMI, OCO2, FLEX, and
CarbonSat. Discussed in this paper is a fast and flexible forward operator
for the simulation of hyperspectral radiances in the oxygen A band and, based
on this scheme, a sensitivity study about the inversion quality of aerosol
optical thickness, aerosol mean height, and aerosol type. The forward
operator is based on a lookup table with efficient data compression based on
principal component analysis. Linear interpolation and computation of partial
derivatives is performed in the much smaller space of expansion coefficients
rather than wavelength. Thus, this approach is computationally fast and, at
the same time, memory efficient. The sensitivity study explores the impact of
instrument design on the retrieval of aerosol optical thickness and aerosol
height. Considered are signal to noise ratio, spectral resolution, and
spectral sampling. Also taken into account are surface inhomogeneities and
variations of the aerosol type. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|