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Download e-book for kindle: Air Survey of Sand Deposits by Spectral Luminance by Mariya A. Romanova

By Mariya A. Romanova

ISBN-10: 1468472038

ISBN-13: 9781468472035

ISBN-10: 1468472054

ISBN-13: 9781468472059

This publication supplies an account of a style of deciding on the sort composition of sandy deposits from the air by means of the character in their mirrored image of radiant strength. The measured spectral luminance of a rock outcrop rela­ ti ve to the luminance of a regular is the fundamental estate thought of during this technique. The spectral luminance elements p\ are measured through targeted tools - a common photometer, cinespectrograph, spectro­ visors, and different spectrometers. The measured values of P" of the investigated rocks are interpreted geologically by using a few equipment of mathematical data in order that a way of lithological mapping of sandy deposits from the air are available. the significance of constructing a mode of choosing the sort composition of rocks, basically sandy de­ posits, from the air stems from the large incidence of deserts at the earth's floor. Sandy deserts occupy immense parts within the southern latitudes of the USSR and happen in western and crucial China, Pakistan, Iran, India, and different states. In those deserts there are many deposits of petroleum and fuel, and a look for water is consistently in growth. winning prospecting for the above minerals will depend on a selection of the cloth composition of the sandy deposits in those deserts and the answer of a number of questions of contemporary tec­ tonics, paleogeography, and quaternary geology, the solutions to which would even be given via a examine of the dis­ tribution of lithological sorts of sands.

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Additional resources for Air Survey of Sand Deposits by Spectral Luminance

Example text

For this purpose the emission spectrum of iron was photographed (Fig. 42). , 1952) the boundaries of the corresponding wavelengths of the spectrogram are determined. The faults inherent in all aerial spectrographs which register reflection spectra photographically and in the described aerial cinespectrograph are as follows: 1. The times of photometry of the standard and the investigated object do not coincide. The interval between these times introduces errors due to changes in the conditions of illumina tion of the compared objects (standard.

Photometry was first performed on different parts of the barchan; 1) the base; 2) the gentle northwest slope with an angle of inclination of about 20°; 3) the top of the barchan. which has an almost horizontal, even surface; 4) the relatively steep northeast slope. which has an average angle of inclination of 33°. In every case the photometered surface was a clean one, composed of blown sand with traces of wind ripple. The period of time during which the photometry of these four parts was performed was approximately a half-hour between 12 noon and 1 PM local time.

41. Spectrogram of standard photographed with an inserted optical wedge. 42. This iron emission spectrum, obtained in work with an aerial cinespectrogra ph, is used to determine the limits of the spectrum or the working region of the spectrogra ph. 1. The cinespectrograph is mounted on the airplane or helicopter so that it can be easily reremoved for photometry of the standard as soon as the aircraft lands. 2. 5-2 hr of surveying. The standard (barite paper) can be kept in a special cassette, which is opened at the time of photometry.

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Air Survey of Sand Deposits by Spectral Luminance by Mariya A. Romanova


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