Vis-NIR reflectance spectrum of Pierrerue pigment (PIG_0176_A_601), powder with grains < 160 µm, d=1.33 g/cm3
- Title
- Vis-NIR reflectance spectrum of Pierrerue pigment (PIG_0176_A_601), powder with grains < 160 µm, d=1.33 g/cm3
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20200814_100
- Data reference
- Schmitt, Bernard; Chalmin-Aljanabi, Emilie; Chassin de Kergommeaux, Aurélie (2019): Vis-NIR reflectance spectra of Pierrerue pigments (PIG_0176_A): raw blocks, powders, plots and painted matter. SSHADE/PIG (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20200814_100
- Publications
-
- Comments
- unpublished
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Instrument
- SHADOWS Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- cylindrical aluminium sample holders of various sizes for powder
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- Vis
- Valid spectral range(s)
-
Min - Max (nm) Sampling (nm) Resolution (nm) Position accuracy (nm) Absorption edge #1 392.0 - 673.0 10.0 4.8 0.25 #2 683.0 - 913.0 10.0 9.7 0.5 - Filters
-
Type Center/Edge (nm) Width (nm) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 360-1000nm range
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 illumination
- 5.8°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 5.2 ± 0.1 mm
- Comments
- illumination with 8 fiber optic spots within a 5.2 mm diameter, observation within an ellipse of 23x20 mm
- Instrument
- SHINE Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- cylindrical aluminium sample holders of various sizes for powder
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- NIR
- Valid spectral range(s)
-
Min - Max (nm) Sampling (nm) Resolution (nm) Position accuracy (nm) Absorption edge #1 920.0 - 1420.0 10.0 9.5 0.5 #2 1430.0 - 2900.0 10.0 19.0 1.0 - Filters
-
Type Center/Edge (nm) Width (nm) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 530-2900nm range
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 illumination
- 5.8°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 7.5 ± 0.2 mm
- Comments
- illumination with 9 fiber optic spots within 7.5 mm diameter, observation within an ellipse of 23x20 mm
- Experiment
- Vis-NIR reflectance spectra of Pierrerue pigments (PIG_0176_A): raw blocks, powders, plots and painted matter
- Date begin
- 2019-10-01
- Date end
- 2019-10-04
- Release date
- 2025-02-01 10:01:55+0000 UTC
- Version (Date)
- #1 (2025-02-01 10:01:55+0000 UTC, Updated: 2025-02-01 10:01:55+0000 UTC)
- History
-
Date Mode Version Status Comments 2020-08-17 20:54:19+0000 UTC first import #1 valid version
- Analysis
- raw bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (0.36-2.1µm) and 2) with "Infragold" using its relative spectral reflectance (2.1-2.9µm). The visible spectrum (0.36-0.91µm) is scaled by a factor 1.085 (due to slightly different compaction and density of the 2 samples) and merged with the NIR spectrum (0.91-4.7µm). The residual water vapor lines, around 1.12, 1.38, 1.87, 2.665µm, have been corrected by multiplying by a scaled water vapor transmission spectrum measured at same resolution and sampling. A very slight smoothing (binomial over 3 points) has been applied, except in the visible (<0.95µm) and in the NIR absorption bands.
- Quality flag
- 3
- Validator(s)