Spectrum

NIR bidirectional reflection spectrum (i=0°/e=30°) of Smectite SWy-2 0-25µm grains at 298K, Patm

Title
NIR bidirectional reflection spectrum (i=0°/e=30°) of Smectite SWy-2 0-25µm grains at 298K, Patm
DOI
10.26302/SSHADE/EXPERIMENT_BS_20121213_002
Data reference
Pommerol, Antoine; Schmitt, Bernard (2007): Near-IR bidirectional reflection spectra (i=0°, e=30°) of Smectite SWy-2 for different grain sizes at 298K in ambient air. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20121213_002
Publications
Experiment type
laboratory measurement
Type
reflectance factor
Instrument
SHINE Spectro-Gonio bidirectional reflection Vis-NIR
Sample holder
Aluminum plate with 1 mm deep circular hole (3 cm) inside P-T controled chamber closed by saphire window and cooled by Peltier elements (SERAC environmental chamber)
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 - 2.0 0.02 0.024 0.001
#2 2.0 - 4.18 0.02 0.048 0.001
Filters
Type Center/Edge (${\mu}m$) Width (${\mu}m$) Place
#1 long-pass filters of the spectro-gonio radiometer
Scan number
10
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
0.1°
Resolution observation
4.1°
Illumination
Observation
Comments
partial polarization variable with wavelength (from monochromator grating)
Observation mode
single spot
Image size
23.1 x 20.0 $mm$
Comments
elliptic observation spot
Experiment
Near-IR bidirectional reflection spectra (i=0°, e=30°) of Smectite SWy-2 for different grain sizes at 298K in ambient air
Date begin
2007-01-01
Release date
2018-01-31 23:51:01 UTC+0000
Version (Date)
#1 (2018-01-31 23:51:01 UTC+0000)
History
Date Mode Version Status Comments
2017-07-04 10:13:32 UTC+0000 first import #1 obsolete version 2012-12-12: new bidirectional reflectance spectrum (NIR) of smectite 0-25µm grains
2019-12-28 10:24:21 UTC+0000 new version #2 valid version adjustment of the reflectance of the first grating by -0.2%
Analysis
raw bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (1.0-2.5µm) and 2) with "Infragold" using its relative spectral reflectance (2.5-4.2µm)
Quality flag
4
Validator(s)