- Title
- NIR-MIR reflectance spectra of powdered Olivine at 4 different grain sizes (from 200 µm down to sub-µm)
- DOI
- 10.26302/SSHADE/EXPERIMENT_OP_20230203_001
- Data reference
- Sultana, Robin (2019): NIR-MIR reflectance spectra of powdered Olivine at 4 different grain sizes (from 200 µm down to sub-µm). SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20230203_001
- Publications
- Database(s)
- Experimentalists
- Type(s)
- laboratory measurement
- Description
- We measured the reflectance spectra (from 1 to 25 µm) of powders of olivine. The powders were grinded and sieved and the spectra of four size fractions were measured: 100-200 µm, 50-100 µm, 25-50 µm, and sub-micrometer sized grains.
- Number of spectra
- 4
- Variable type(s)
-
- sample grain size
- Instrument
- Brucker Vertex 70 – transmission Mid-IR
- Standard medium
- air
- Observation mode
- spectrum
- Spectral range type(s)
- NIR, MIR
- Valid spectral range(s)
-
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge #1 400.0 - 4500.0 0.482 1.0 0.1
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- biconical
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 30.0°
- Resolution observation
- 5.0°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Spatial resolution
- 5.0 ${\pm}$ 1.0 $mm$
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- Vis, NIR
- Valid spectral range(s)
-
Min - Max ($nm$) Sampling ($nm$) Resolution ($nm$) Position accuracy ($nm$) Absorption edge #1 500.0 - 660.0 20.0 3.2 #2 680.0 - 1380.0 20.0 6.3 #3 1400.0 - 2980.0 20.0 13.0 #4 3000.0 - 4200.0 20.0 26.0 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 long-pass filters of the spectro-gonio radiometer
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- bidirectional
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 30.0°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- partial polarization variable with wavelength (from monochromator grating)
- Observation mode
- single spot
- Spatial resolution
- 5.2 $mm$
- Date begin - end
- 2019-01-01 - 2020-01-01
Versions
- Release date
- 2023-02-06 14:19:14 UTC+0000
- Version (Date)
- #1 (2023-02-06 14:19:14 UTC+0000, Updated: 2023-02-08 09:42:46 UTC+0000)
- Sponsors
-
- European Research Council (ERC SOLARYS) (SOLARYS: Composition of Solar System Small Bodies (ERC-CoG2017-771691))