General Forest Products Research Links
Examples and papers about applications relevant to the forest products industry by researchers using ASD instrumentation.
Direct solar spectral irradiance and transmittance measurements from 350 to 2500 nm
A radiometrically stable, commercially available spectroradiometer was used in conjunction with a simple, custom-designed telescope to make spectrally continuous measurements of solar spectral transmittance and directly transmitted solar spectral irradiance.
Multispectral and Hyperspectral Remote Sensing of Alpine Snow Properties
Models of processes in the alpine snow cover fundamentally depend on the spatial distribution of the surface energy balance over areas where topographic variability causes huge differences in the incoming solar radiation and in snow depth because of redistribution by wind.
Empirical Proof of the Empirical Line
Calibrating remotely sensed data to reflectance maximizes their quantitative utility. Many approaches exist for calibrating to reflectance (?), one of which is the empirical line (EL) method.
Global soil characterization with VNIR diffuse reflectance spectroscopy
There has been growing interest in the use of diffuse infrared reflectance as a quick, inexpensive tool for soil characterization. In studies reported to date, calibration and validation samples have been collected at either a local or regional scale. For this study, we selected 3768 samples from all 50 U.S. states and two tropical territories and an additional 416 samples from 36 different countries in Africa (125), Asia (104), the Americas (75) and Europe (112).
High Spectral Resolution Remote Sensing of Forest Canopy Lingnin, Nitrogen and Ecosystem Processes
Remote sensing of foliar chemistry has been recognized as an important element in producing large-scale, spatially explicit estimates of forest ecosystem function. This study was designed to determine whether data from NASA’s Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) could be used to determine forest canopy chemistry at a spatial resolution of 20 m, and if so, to use that information to drive an ecosystem productivity model.
Iron-rich precipitates in a mine drainage environment: Influence of pH on mineralogy
Ochreous precipitates deposited by waters draining a sulfide-rich lignite seam exposed in an abandoned mine in the Czech Republic show marked variations in color and mineralogy as a function of effluent pH. When initially formed under acidic (pH 3.7) conditions, the precipitates are orange in color and their mineralogy is dominated by schwertmannite.
The effect of anisotropic reflectance on imaging spectroscopy of snow properties
How does snow's anisotropic directional reflectance affect the mapping of snow properties from imaging spectrometer data? This sensitivity study applies two spectroscopy models to synthetic images of the spectral hemispherical–directional reflectance factor (HDRF) with prescribed snow-covered area and snow grain size.
A New Perspective to Near-Infrared Reflectance Spectroscopy: A Wavelet Approach
A method for incorporating wavelet analysis as a preprocessing tool into NIRS was developed and evaluated with two datasets: (1) a synthetic spectroscopic reflectance dataset, and (2) an actual soil spectroscopic reflectance dataset. The resultant wavelet regression models were evaluated and compared with conventional regression models on their prediction accuracy and numbers of regressor variables.
Using Imaging Spectroscopy To Map Acidic Mine Waste
Airborne and orbital imaging spectrometers can be used to map these mineral zones because each of these Fe-bearing secondary minerals is spectrally unique.
Assessing mine drainage pH from the color and spectral reflectance of chemical precipitates
The pH of mine impacted waters was estimated from the spectral reflectance of resident sediments composed mostly of chemical precipitates. Mine drainage sediments were collected from sites in the Anthracite Region of eastern Pennsylvania, representing acid to near neutral pH.
