===== Retrieval of NO2 for scenes including realistic clouds =====

==== Test case ====

  * Subdomain of ICON, approx. 350x350km²
  * Resolution of cloud data approx. 1.2x1.2km², 296x276x110 grid boxes
  * Simulations performed for pixel size of 7x7km² (50x48 pixels)

=== Reflectance and box-AMF simulation ===

  * wavelength: 550nm
  * US standard atmosphere
  * SZA: 30°, SAA: 25°
  * Viewing direction: nadir
  * surface albedo: 0.05
  * clouds from ICON simulation

[{{ :projects:3dcats:wp_200:les_cloud:reflectance.png?800 |Simulated reflectance. The left side is simulated on the same horizontal resolution as the cloud data (approx. 1.2x1.2km²), the middle is for a pixel size of approx. 7x7 m². The right panel shows the standard deviation of the reflectance for 10^5 photons per pixel.}}]
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[{{ :projects:3dcats:wp_200:les_cloud:spectra.png?400 |Reflectance spectra for pixels indicated in figure above. The shaded areas show the standard deviation of the Monte Carlo results.}}]

[{{ :projects:3dcats:wp_200:les_cloud:box_amf_profiles.png?400 |Layer-AMfs for pixels indicated in figure above. The shaded areas show the standard deviation of the Monte Carlo results.}}]
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[{{ :projects:3dcats:wp_200:les_cloud:amf_horizontal_cross_sections.png?800 |Layer-AMFs for horizontal cross sections at various altitudes. }}]
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[{{ :projects:3dcats:wp_200:les_cloud:amf_horizontal_cross_sections_std.png?800 |Standard deviation of layer-AMFs for horizontal cross sections at various altitudes. There are larger values of several per cent. Those occur randomly. The mean standard deviation of all boxes is 1.9%.}}]
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[{{ :projects:3dcats:wp_200:les_cloud:amf_vertical_cross_sections.png?800 |Layer-AMFs for vertical cross sections at various y-positions. }}]
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[{{ :projects:3dcats:wp_200:les_cloud:amf_vertical_cross_sections_std.png?800 |Standard deviation of layer-AMFs for vertical cross sections at various y-positions. }}]

{{:projects:3dcats:wp_200:les_cloud:les_test_case_v2.nc|MYSTIC results (spectral reflectance and box-AMFs at 450nm)}}

{{:projects:3dcats:wp_200:les_cloud:test.rad.spc.gz|MYSTIC results (reflectance at 450nm, 296x276 pixels.)}}

{{:projects:3dcats:wp_200:les_cloud:wc3d.dat.gz|Water cloud input file.}}

{{:projects:3dcats:wp_200:les_cloud:ic3d.dat.gz|Ice cloud input file.}}