Vis-NIR reflectance spectrum of powdered Amorphous Silica (100-200 µm grains) at ambient temperature
- Title
- Vis-NIR reflectance spectrum of powdered Amorphous Silica (100-200 µm grains) at ambient temperature
- DOI
- 10.26302/SSHADE/EXPERIMENT_OP_20200908_001
- Data reference
- Sultana, Robin (2018): Vis-NIR reflectance spectra of powdered olivine, pyroxene, smectite and silica at 4 different grain sizes (from sub-µm to 200 µm) and with sub-µm grains in compact or porous surfaces. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20200908_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- 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 #1 440.0 - 660.0 20.0 5.0 #2 680.0 - 1380.0 20.0 10.0 #3 1400.0 - 2980.0 20.0 20.0 #4 3000.0 - 4200.0 20.0 40.0 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 long-pass filters of the spectro-gonio radiometer - Scan number
- 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
- 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°
- Comments
- The spectro-radio-goniometer SHINE was used in Gognito mode, as described in Potin et al. (2018, https://doi.org/10.1364/AO.57.008279), section D.2. The illumination beam was focused on an area of 6 mm in diameter on the sample, in order to increase the signal-to-noise ratio of our measurements.
Illumination
Observation
- Comments
- partial polarization variable with wavelength (from monochromator grating)
- Observation mode
- single spot
- Resolutions
- 6.0 $mm$
- Experiment
- Vis-NIR reflectance spectra of powdered olivine, pyroxene, smectite and silica at 4 different grain sizes (from sub-µm to 200 µm) and with sub-µm grains in compact or porous surfaces
- Date begin
- 2018-10-10
- Release date
- 2020-10-06 07:47:56 UTC+0000
- Version (Date)
- #1 (2020-10-06 07:47:56 UTC+0000, Updated: 2020-10-06 10:41:13 UTC+0000)
- History
-
Date Mode Version Status Comments 2020-10-01 15:34:03 UTC+0000 first import #1 valid version
- Analysis
- 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)
- Quality flag
- 4
- Validator(s)