sshade:databases:uh-aps

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sshade:databases:uh-aps [2020/11/18 19:34] – created Bernard Schmittsshade:databases:uh-aps [2020/11/18 19:36] (current) – Bernard Schmitt
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 +====== SSHADE Databases: UH-ApS ======
 +=== University of Helsinki Astrophysical Scattering and Spectroscopy Database ===
  
 +University of Helsinki Astrophysical Scattering and Spectroscopy Laboratory (UH-ApS), Planetary System Research group (PSR), Department of Physics, University of Helsinki, Helsinki, Finland
 +
 +   * //Scientific Manager//: Karri Muinonen
 +   * //Database Manager//: Antti Penttilä
 +   * //Data Providers//: Tomas Kohout, Julia Martikainen
 +
 +-----
 +
 +The UH laboratory will concentrate on solid and particulate materials with applications on planetary
 +sciences. In particular, we are measuring in ambient atmospheric conditions and in room temperatures, so
 +mineral materials are mostly measured. The materials are natural but can be synthetically processed to,
 +e.g., mimic space-weathering effects. We are particularly interested in measuring meteorites and similar
 +materials. 
 +
 +We are measuring:
 +  - Directional-hemispheric reflectance spectra with integrating-sphere spectrometer, in the wavelength range from 250 nm to 3200 nm. Measurement area is from about 1 mm to 1 cm.
 +  - Spectro-polarimetric BRDF in the wavelength range from 420 nm to 800 nm and possibility to record different states of linear polarization. Measurement area is from about 1 mm to 1 cm.
 +  - single-particle polarimetric scattering for a few filters in visual wavelengths and different states of linear polarization measured from the complete 4 π solid angle from the particle, except for the lobes close to back- and forward scattering directions. The particle to-be-measured should have size between about 5 mm and 3 cm. 
 +  - spectral backscattering in wavelength range from 470 nm to 900 nm. The measurement area is about 1 cm.
 +
 +We plan to produce reflectance spectra and photometric BRDF for all the samples we measure.
 +In addition, for some samples we can also produce spectral BRDF, polarimetric BRDF, single-particle
 +scattering matrix (i.e., Mueller matrix or the 2×2 upper left submatrix of the Mueller matrix), and spectral
 +backscattering RDF. 
 +
 +In addition, we will consider providing the modeled absorption coefficient (i.e.,
 +imaginary part of the refractive index) for the well-defined solid and particulate samples we measure via
 +light-scattering simulation modeling of the measurements.
 +
 +The typical applications are in planetary sciences, especially in asteroid regolith studies, and in the
 +general verification and development of light-scattering modeling techniques and algorithms.
 +
 +-----
 +
 +The //**UH-ApS**// database service contains spectroscopic experimental data of minerals and rocks.
 +
 +
 +  * [[sshade:databases:new1:samples|Samples and Spectra]]
 +  * [[sshade:databases:new1:instruments|Instruments and Techniques]]
 +
 +----
 +
 +☛ [[https://www.sshade.eu/db/uh-aps|Access to the SSHADE/UH-ApS search page.]]