منابع مشابه
Decompression tables for inside chamber attendants working at altitude.
INTRODUCTION Hyperbaric oxygen (HBO2) multiplace chamber inside attendants (IAs) are at risk for decompression sickness (DCS). Standard decompression tables are formulated for sea-level use, not for use at altitude. METHODS At Presbyterian/St. Luke's Medical Center (Denver, Colorado, 5,924 feet above sea level) and Intermountain Medical Center (Murray, Utah, 4,500 feet), the decompression obl...
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High-altitude platforms (HAP) or near-space vehicle offers several advantages over current low earth orbit (LEO) satellite and airplane, because HAP is not constrained by orbital mechanics and fuel consumption. These advantages provide potential for some specific remote sensing applications that require persistent monitoring or fast-revisiting frequency. This paper investigates the azimuth-vari...
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We present a review of common-azimuth prestack depth migration theory and propose a new extension to the original method. In common-azimuth migration theory, source and receiver raypaths are constrained to lie on the same plane at each depth level. By using data with a broader range of cross-line offsets, we increase the number of raypaths examined and consider more information. Consequently, o...
متن کاملMulti-azimuth velocity estimation
It is well known that the inverse problem of estimating interval velocities from reflection data is poorly constrained in 2-D. We show that the interval velocity estimation problem in 3-D is much better constrained when the velocity function is estimated by jointly inverting the data collected along multiple offset-azimuth, even when the azimuth range is fairly limited. We extend to 3-D the lin...
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Detailed knowledge of the estimation performance for passive tracking of maneuvering targets is of fundamental interest. Therefore, the maximum achievable localization accuracy for maneuvering targets from azimuth measurements as well as from combined azimuth and azimuth rate measurements are calculated in this paper. These targets perform a piecewise curvilinear motion with an unknown number o...
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ژورنال
عنوان ژورنال: The Geographical Journal
سال: 1911
ISSN: 0016-7398
DOI: 10.2307/1778425