Abstract
Diffusers in in-orbit spectroradiometers cause speckle under partially coherent solar radiation. A speckle pattern entering a spectroradiometer through a small slit creates systematic spectral deviations in measured spectra. We have developed a setup to characterise the spatial speckle of diffusers and the related spectral features. The decorrelation angles measured at 532 nm for Spectralon, Diffusil, and Heraeus diffusers were 0.021, 0.014, and 0.005 respectively. This information can be used for compensating speckle-related spectral features from the radiometric satellite measurements by averaging over multiple decorrelated spectra.
| Original language | English |
|---|---|
| Article number | 012002 |
| Number of pages | 5 |
| Journal | Journal of Physics: Conference Series |
| Volume | 972 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2 Mar 2018 |
| MoE publication type | A4 Conference publication |
| Event | International Conference on New Developments and Applications in Optical Radiometry - Tokyo, Japan Duration: 13 Jun 2017 → 16 Jun 2017 Conference number: 13 |