VIS-NIR-MIR reflectance spectrum of Olivine powder (sub-µm grains)
- Title
- VIS-NIR-MIR reflectance spectrum of Olivine powder (sub-µm grains)
- DOI
- 10.26302/SSHADE/EXPERIMENT_OP_20230207_001
- Data reference
- Sultana, Robin (2019): VIS-NIR-MIR Reflectance spectra of mixtures of sub-µm grains of Olivine with Iron Sulfides or Anthracite, at different concentrations. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20230207_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Instrument
- Brucker Vertex 70 – transmission Mid-IR
- Sample holder
- Aluminum sample holder in a biconical reflectance kit A513/QA
- Standard medium
- air
- Observation mode
- spectrum
- Spectral range type(s)
- NIR, MIR
- Valid spectral range(s)
-
Min - Max ($nm$) Sampling ($nm$) Resolution ($nm$) Position accuracy ($nm$) Absorption edge #1 2222.0 - 25000.0
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
- 15.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 45.0°
- Resolution observation
- 5.0°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 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 3.8 #2 680.0 - 1380.0 20.0 7.6 #3 1400.0 - 2980.0 20.0 15.0 #4 3000.0 - 4200.0 20.0 31.0 - 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
- Resolutions
- 5.2 $mm$
- Experiment
- VIS-NIR-MIR Reflectance spectra of mixtures of sub-µm grains of Olivine with Iron Sulfides or Anthracite, at different concentrations
- Date begin
- 2019-01-01
- Release date
- 2023-02-07 21:19:37 UTC+0000
- Version (Date)
- #1 (2023-02-07 21:19:37 UTC+0000, Updated: 2024-03-14 16:23:13 UTC+0000)
- History
-
Date Mode Version Status Comments 2023-02-07 20:33:38 UTC+0000 first import #1 valid version
- Analysis
- From 500 nm to 2500/4000 nm the spectra were measured with the SHADOWS spectro-gonio-radiometer. Data calibration: raw bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (0.50-1.10µm) and 2) with "Infragold" using its relative spectral reflectance (1.10-4.18µm). From 2500/4000 nm to 25 nm, the spectra were measured with a reflectance kit on a FTIR spectrometer. Data calibration: raw biconical reflectance spectrum calibrated in relative reflectance with "matte gold plate" measured under same geometry assuming flat spectral reflectance over the whole 7500-540 cm-1 range. Residual water vapor lines (between 1750-1400, 3900-3550, 5500-5200 cm-1) and CO2 vapor lines (around 630-700 and 2360-2300 cm-1) can be observed. The portion of the spectra measured with the FTIR spectrometer was scaled to match the reflectance factor measured with SHADOWS at a wavelength in the range 2500-4000 nm, variable depending on the spectrum.
- Quality flag
- 4
- Validator(s)