Spectrum

Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31 μm containing 1 wt.% Smectite in intra-mixture after 49.66h

Title
Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31 μm containing 1 wt.% Smectite in intra-mixture after 49.66h
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Data
Unit:  Range: Valid spectral range(s): 4347.82608695652 - 26315.7894736842 micron
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DOI
10.26302/SSHADE/EXPERIMENT_OP_20180119_001
Data reference
Poch, Olivier (2014): Vis-NIR reflectance spectra of the sublimation of Water ice particles containing 1 wt.% Smectite in intra-mixture. SSHADE/BYPASS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20180119_001
Publications
Database
Experimentalists
Spectrum type
Experiment type
laboratory measurement
Type
reflectance factor
Comments
In the reduced data set, absolute uncertainty on the calibrated reflectance factor is ±0.1, and the spatial variability of the reflectance across the field of view is of the order of 10%. Thus, the SCITEAS imaging system does not provide a very accurate measurement of the absolute reflectance, but it provides a spectrum resolved in wavelength from 0.4 to 2.4 μm.
Instrument #1
Instrument
SCITEAS Imaging System - hyperspectral imaging system Vis-NIR
Sample holder
Aluminum sample holder, rectangular 120x60 mm with a thickness of 20mm, equipped with PT100 temperature sensors
Standard medium
air
Observation mode
spectrum
Spectral range type(s)
Vis, NIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 0.38 - 0.96 0.02 0.015
#2 0.96 - 2.3 0.01 0.03
Scan number
1
Observation geometry
biconical
Observation mode
fixed angles
Emergence angle
13.0°
Azimuth angle
0.0°
Comments
The light beam emitted from the extremity of the fibre bundle positionned about 300 mm above the sample surface has a divergence half-angle of 12.7°. The light source incidence and azimuth angles are slightly variable from pixel to pixel.
Observation mode
roi averaged
Comments
Note to the provider: Complete the "image" observation_mode when fully implemented in SSHADE. Because SCITEAS data are hyperspectral images.
Name
Sublimation mantle of Smectite on Water ice and Smectite intra-mixture particles 67±31 μm
Changes
After 49.66h of sublimation, a desiccated layer made of pure smectite, about 13.41±0.99 mm thick, covers the ice particles.
Primary material(s)
Experiment
Vis-NIR reflectance spectra of the sublimation of Water ice particles containing 1 wt.% Smectite in intra-mixture
Date begin
2014-08-01
Release date
2018-02-15 15:25:05 UTC+0000
Version (Date)
#1 (2018-02-15 15:25:05 UTC+0000, Updated: 2021-06-23 04:33:42 UTC+0000)
History
Date Mode Version Status Comments
2018-02-09 00:02:05 UTC+0000 first import #1 valid version new reflectance spectrum
Analysis
White Spectralon (99%) plates (Labsphere) were used as external and internal calibration standards.
Quality flag
4
Export suffix
_roi_smectite_intra1
Original file
20140730_swy-2_ice_hielscher_phase1_cube_roi_vis.sav
Format
sav
RGB composite of the sample as seen by the SCITEAS Imaging System. The red box indicates the region of interest (ROI) of the hyperspectral cube from which the spectrum of the sample was computed.