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Progress in Field Spectroscopy
The measurement of spectral data in the field has an important role in remote sensing, and a long history, but instruments and methods to achieve this have serious limitations. Expand
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Hydrothermal gold mineralization in the Witwatersrand basin
The origin of the gold mineralization in the Witwaterstrand basin of South Africa—the largest known gold province—has been controversial for decades, with arguments favouring detrital1,2 (placer),Expand
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Achieving Climate Change Absolute Accuracy in Orbit
The Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission will provide a calibration laboratory in orbit for the purpose of accurately measuring and attributing climate change.Expand
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Trap Detectors and their Properties
The paper describes a new solid state detector which fulfils all the requirements of the ideal detector for optical radiation measurements. This trap detector is shown to be spatially uniform,Expand
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Overview of Intercalibration of Satellite Instruments
Intercalibration techniques as outlined in this paper not only provide a practical means of identifying and correcting relative biases in radiometric calibration between instruments but also enable potential data gaps between measurement records in critical time series to be bridged. Expand
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A Cryogenic Radiometer for Absolute Radiometric Measurements
The adoption in 1979 of a new definition of the candela, which permitted a detector-based approach to the realization of the unit, has emphasized the importance of high-accuracy absolute radiationExpand
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Temperature and nonlinearity corrections for a photodiode array spectrometer used in the field.
Temperature and nonlinearity effects are two important factors that limit the use of photodiode array spectrometers. Usually the spectrometer is calibrated at a known temperature against a referenceExpand
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Establishing the Antarctic Dome C community reference standard site towards consistent measurements from Earth observation satellites
Establishing satellite measurement consistency by using common desert sites has become increasingly more important not only for climate change detection but also for quantitative retrievals ofExpand
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Structural controls on Witwatersrand gold mineralisation
Abstract Structural controls on the distribution of gold in the Witwatersrand Basin can be seen at scales ranging from that of thin sections up to regional seismic data sets. At the thin sectionExpand
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REVIEW ARTICLE: Photometry, radiometry and 'the candela': evolution in the classical and quantum world
The metrological fields of photometry and radiometry and their associated units are closely linked through the current definition of the base unit of luminous intensity—the candela. These fields areExpand
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