Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 215 K (t=89h)
- Title
- Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 215 K (t=89h)
- DOI
- 10.26302/SSHADE/EXPERIMENT_OP_20200701_001
- Data reference
- Schroeder, Stefan; Poch, Olivier; Ferrari, Marco; DeAngelis, Simone (2019): Vis-NIR reflectance spectra of Nontronite NAu-1, pure, mixed with Water ice, during and after ice sublimation. SSHADE/CSS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20200701_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Comments
- At 1.3-1.5 µm, 1.8-2.0 µm and 2.4-3.0 µm, the spectrum is affected by measurement artifacts due to the presence of water vapor in the optical path.
- Instrument
- SHINE Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- Aluminum sample holder, closed by a sapphire window and cooled by a He cryostat in a vacuum chamber (Carbo-NIR)
- 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 - 4180.0 20.0 26.0 - 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 $mm$
- Name
- Sublimation residue made of Nontronite on Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K
- Changes
- After 89h under high vacuum, the sublimation of water ice left a desiccated layer on top of the sample, made of the Nontronite which covers the ice particles still sublimating below this layer. Between 88 and 89h, a several mm-thick layer of sublimation residue has been removed from the sample surface following an explosion event triggered by pressure exerted by the sublimating water vapour on the residue layer. After this explosion, at 89h, the sample is made of a thin (1mm-thick) layer of sublimation residue of nontronite coating a layer of ice still sublimating.
- Experiment
- Vis-NIR reflectance spectra of Nontronite NAu-1, pure, mixed with Water ice, during and after ice sublimation
- Date begin
- 2019-04-20 07:56:00
- Release date
- 2020-11-02 13:13:35 UTC+0000
- Version (Date)
- #1 (2020-11-02 13:13:35 UTC+0000, Updated: 2020-11-02 13:49:29 UTC+0000)
- History
-
Date Mode Version Status Comments 2020-07-01 20:32:14 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)