NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t2 (t=20min)
- Title
- NIR reflectance spectrum of sublimating CO2 snow with 1.5wt% H2O ice - t2 (t=20min)
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20191226_001
- Data reference
- Philippe, Sylvain; Schmitt, Bernard; Beck, Pierre; Brissaud, Olivier (2014): NIR reflectance spectra of two mixtures of CO2 snow and H2O ice (0.1%, 1.5%) submitted to slow sublimation under illumination. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20191226_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Instrument
- SHINE Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- P-T controled copper cylindrical cell closed by sapphire windows and cooled by helium cryocooler (CarboN-IR environmental cell)
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- NIR
- Valid spectral range(s)
-
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge #1 1.0 - 1.59 0.01 0.0095 0.001 #2 1.6 - 2.99 0.01 0.0191 0.002 #3 3.0 - 3.99 0.01 0.0388 0.004 - Scan number
- 10
- Comments
- using 1.5mm slit
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
- 15.0°
- Azimuth angle
- 0.0°
- Phase angle
- 15.0°
- Resolution illumination
- 0.1°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- polarization varying between gratings
- Observation mode
- single spot
- Resolutions
- 20.0 $mm$
- Name
- H2O ice layer over CO2 snow with 1.5% H2O ice
- Changes
- $CO_2$ sublimation: growth of top H2O layer. Surface area: 40$^{+2.5}_{-2.5}$%, thickness: 108$^{+5.8}_{-4.2}$µm, mean grain size: 310$^{+0}_{-48}$µm; 1µm frost: 8.4$^{+0.7}_{-0.7}$%
- Experiment
- NIR reflectance spectra of two mixtures of CO2 snow and H2O ice (0.1%, 1.5%) submitted to slow sublimation under illumination
- Date begin
- 2014-05-21 11:48:00
- Date end
- 2014-05-21 13:35:00
- Release date
- 2020-01-28 09:15:39 UTC+0000
- Version (Date)
- #1 (2020-01-28 09:15:39 UTC+0000, Updated: 2020-03-18 06:40:54 UTC+0000)
- History
-
Date Mode Version Status Comments 2020-01-27 22:33:04 UTC+0000 first import #1 valid version
- Analysis
- raw bidirectional reflectance spectrum calibrated: 1) in the 1-2.5µm range with "Spectralon 99%" standard (LabSphere (c)) measured under same geometry using its absolute BRDF and 2) in the 2.5-4.0.µm range with "Infragold" (LabSphere (c)) using its relative spectral reflectance
- Quality flag
- 4
- Validator(s)