Results 181 to 190 of about 18,055 (209)
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Survey Review, 1991
AbstractThe method permits the precise determination of the azimuth of a target and the astronomical latitude of the observer, by observation to two unknown stars sufficiently symmetric with respect to the north direction and observed at different times.Compared with analogous methods employing only one unknown star, this method presents the advantage ...
A Vassallo
exaly +2 more sources
AbstractThe method permits the precise determination of the azimuth of a target and the astronomical latitude of the observer, by observation to two unknown stars sufficiently symmetric with respect to the north direction and observed at different times.Compared with analogous methods employing only one unknown star, this method presents the advantage ...
A Vassallo
exaly +2 more sources
Comparison between the azimuths of astronomical and geodetic coordinates in Ghana
Journal of the Ghana Institution of Engineering (JGhIE), 2023Astronomic azimuths are bearings, which are referenced to the true north direction whereas geodetic azimuths are those referenced to a grid north direction. The difference between these two directions can be expressed through the deflection of the vertical.
Asante , Cosmas +3 more
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The accuracy of astronomic azimuth determinations
Bulletin Géodésique, 1978Astronomic azimuths are used in classical geodesy, through the Laplace equation, to control the orientation of geodetic networks. The method most commonly used by the United States National Geodetic Survey for the determination of astronomic azimuth is often referred to as the “direction method”, and is based on observations of Polaris at any hour ...
William E. Carter +2 more
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Estimation of the azimuth of an astronomic reference
Guidance and Control Conference, 1978The determination of the azimuth of an astronomic reference is an important aspect in the calibration and evaluation of ICBM guidance system performance. Another useful area is the initial and precise in-flight alignment of inertial platforms, azimuth gyros, and the subsequent monitoring of these platforms.
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Rapid methods for determining astronomical azimuths
Eos, Transactions American Geophysical Union, 1944Astronomical computations for position or azimuth are not difficult for the astronomer or mathematician, even though such computations may be time‐consuming. In the past few years, however, there has been a general trend toward the simplification of problems involving astronomy.
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2019 26th Saint Petersburg International Conference on Integrated Navigation Systems (ICINS), 2019
A method of relative measurements to control the accuracy characteristics of the automatic system for determining the astronomical azimuth is proposed and the algorithms for its implementation are given. The development of the method is relevant since there is no reference base for direct (absolute) control of accuracy characteristics by ...
S.B. Berkovich +6 more
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A method of relative measurements to control the accuracy characteristics of the automatic system for determining the astronomical azimuth is proposed and the algorithms for its implementation are given. The development of the method is relevant since there is no reference base for direct (absolute) control of accuracy characteristics by ...
S.B. Berkovich +6 more
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An astronomical azimuth measurement system aided with an automatic gyro total station
SPIE Proceedings, 2006Gyro orientation technique is widely used in many fields, such as navigation, aviation, space probe and engineering construction. It is one of the key techniques in subterranean construction. In this paper, the advantages and disadvantages of the orientation methods such as GPS orientation, gyro-orientation and astronomical orientation are ...
Zhiguo Xia +3 more
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