Air Survey of Sand Deposits by Spectral Luminance

I. Color and Spectral Luminance of Rock.- II. Basic Photometric Concepts.- Reflection and Indicatrices of Diffusion.- Albedo, Luminance, Spectral Luminance.- Spectral Luminance Curves and Their Evaluation.- Experimental Measurements of Spectral Luminance Factors of Rock Samples.- Effect of Natural Illumination on Values of ?? of Rock.- Effect of Nature of Photometered Surface on Values of ??.- III. Methods of Measuring Spectral Luminance Factors of Rocks.- Laboratory Instruments for Measuring the Reflecting Properties of Natural Objects.- The Indicatometer of the Astronomical Observatory of Leningrad State University.- The FM-2 Universal Photometer.- Field Spectrometers.- The RShch-1 Aerial Cinespectrograph.- Spectrometers Employing Photoelectric Registration of the Spectrum.- The 1959 Model Spectrovisor Constructed by a Group of Workers in the Laboratory of Aeromethods.- The Field Photoelectric Spectrometer.- IV. Conditions of Spectrophotometry of Geological Objects. Processing of Spectrograms and Oscillograms.- Height of Flight during Spectrophotometry of Geological Objects.- Light Conditions and Choice of Time of Photometry.- Choice of Films for Registration of Spectra and Oscillograms.- Processing of Exposed Films.- Measurement of Spectrograms and Oscillograms. Plotting of Spectral Luminance Curves of Investigated Objects.- Measurement of Spectrograms and Plotting of ?? Curves.- Measurement of Oscillograms and Plotting of ?? Curves.- V. Evaluation of Spectral Luminance Curves and Methods of Geological Interpretation of Photometric Parameters.- Quantitative Evaluation of Spectral Luminance Curves.- Quantitative Evaluation of ?? Curves by Smoothing with Chebyshev Polynomials.- Evaluation of Photometric Parameters by Plotting Distributions of Observed ??.- Method of Calculating Contingency by the X2 Criterion.- Investigation of Association Between Spectral Luminance of Rock and Its Petrographie-Mineralogical Composition (Linear Correlation Analysis).- VI.