Vis-NIR reflectance spectrum (i=0°, e=10°, 20°, 30°) of powder of bulk Axtell CV chondrite under ambient conditions
- Title
- Vis-NIR reflectance spectrum (i=0°, e=10°, 20°, 30°) of powder of bulk Axtell CV chondrite under ambient conditions
- DOI
- 10.26302/SSHADE/EXPERIMENT_LB_20200902_001
- Data reference
- Beck, Pierre (2019): Bidirectional Vis-NIR reflectance spectra at 3 phase angles (i=0°, e=10°, 20°, 30°) of 72 powders of bulk meteorites (CI, CM, CO, CR, CV, OC, EL, R, HED, mesosiderites). SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_LB_20200902_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Instrument
- SHADOWS Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- open sample holder (13 mm diameter, 2 mm deep) in anodized aluminum (not blackened)
- 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 #1 400.0 - 600.0 100.0 4.0 0.5 #2 700.0 - 1400.0 100.0 8.0 1.0 #3 1500.0 - 2600.0 100.0 16.0 2.0 - 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
- one variable angle
- Resolution illumination
- 5.8°
- Resolution observation
- 1.8°
- Comments
- a diaphragm of 20mm is used in front of the detectors to reduce the angular resolution to $\pm 0.8°$
Illumination
Observation
- Comments
- partial polarization variable with wavelength (from monochromator grating)
- Observation mode
- single spot
- Image size
- 5.2 x 5.2 $mm$
- Number of geometries
- 3
| Incidence | Emergence | Azimuth | Phase |
|---|---|---|---|
| 0.0° | 10.0° | 0.0° | 10.0° |
| 0.0° | 20.0° | 0.0° | 20.0° |
| 0.0° | 30.0° | 0.0° | 30.0° |
- Experiment
- Bidirectional Vis-NIR reflectance spectra at 3 phase angles (i=0°, e=10°, 20°, 30°) of 72 powders of bulk meteorites (CI, CM, CO, CR, CV, OC, EL, R, HED, mesosiderites)
- Date begin
- 2019-02-04
- Release date
- 2020-09-04 07:53:33 UTC+0000
- Version (Date)
- #1 (2020-09-04 07:53:33 UTC+0000, Updated: 2020-09-17 13:10:48 UTC+0000)
- History
-
Date Mode Version Status Comments 2020-09-03 14:56:16 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 (0.4-2.1µm) and 2) with "Infragold" using its relative spectral reflectance (2.1-2.6µm)
- Quality flag
- 3
- Validator(s)