排序方式： 共有27条查询结果，搜索用时 15 毫秒
1.
V. N. Koneshov V. B. Nepoklonov R. A. Sermyagin E. A. Lidovskaya 《Izvestiya Physics of the Solid Earth》2014,50(1):127-136
The methods and techniques for estimating the accuracy of global models of the Earth’s gravity field in the form of spherical harmonic expansion of the geopotential are analyzed. Various methods for obtaining the a priori and a posteriori estimates for the accuracy are considered and classified. The application of different approaches is illustrated by numerical examples for nine models, including those recently developed using the modern methods of space geodesy. The basic requirements for the database and software for estimating the accuracy are formulated. 相似文献
2.
E. A. Boyarsky L. V. Afanasyeva V. N. Koneshov Yu. E. Rozhkov 《Izvestiya Physics of the Solid Earth》2010,46(6):538-543
Specific features of the calculation of the vertical deflection and the geoidal undulation in the Arctic from gravity anomalies
are discussed. Basic requirements to the initial model of the anomalous field are described. The technique of calculating
the vertical deflection with arbitrarily fine detail is proposed. The ways for improving the models of gravity anomalies for
solving the stated problems are suggested. 相似文献
3.
V. N. Koneshov V. V. Klevtsov V. N. Solov’ev 《Izvestiya Physics of the Solid Earth》2016,52(3):452-459
The methodical solutions for improving the GT-2A aerogravimetric complexes by incorporating the Javad Quattro-G3D GPS receiver connected to four antennas spaced in two orthogonal planes are discussed. The operation features of the advanced aerogravimetric complex are described and the results of its application during the testing flight to 78° N latitude are presented. The anomalous gravity obtained in the testing flight is compared with the EGM2008 and EIGEN-6C models. 相似文献
4.
D. V. Abramov M. N. Drobyshev V. N. Koneshov 《Izvestiya Physics of the Solid Earth》2013,49(4):548-553
Continuous high-precision long-term gravity measurements are carried out at the geophysical observatory located in the experimental base of Vladimir State University. The long time series of gravity acceleration and its standard deviation are obtained. The factors responsible for the increases in the studied deviations are analyzed. The recommendations for improving the accuracy of relative gravity measurements are formulated. 相似文献
5.
Creation of a seismic-gravimetric complex that can operate automatically for several years allows one to record the movements
of the test masses of seismometers and gravimeters simultaneously in different frequency bands. The overlapping of these frequencies
takes place in the region of tenths of a Hertz. The seismic-gravimetric complex contains two relative CG-5 gravimeters, one
absolute A10 gravimeter, one three-component Ugra seismic station, one automatic meteorological station, and a two-frequency
GPS receiver. The relative gravimeters are used as the basic instrument. For these devices the problem of displacement of
the gravimeter scale “zero” was solved. To perform long-term monitoring observations using the seismic-gravimetric complex,
a gravimetric observatory was built in the area with a low level of technogenic noises. As a result of the preliminary geophysical
observations, it turned out that the informative parameter is a root-mean-square deviation of the measured gravity force values. 相似文献
6.
Using the method of linear integral representations, analytical approximations and spectral analysis of Arctic depths are performed on the basis of a large data set. Results of calculations performed with the use of computer technologies developed by the authors are presented. 相似文献
7.
G. V. Prostolupov V. M. Novoselitskiy V. N. Koneshov G. P. Shcherbinina 《Izvestiya Physics of the Solid Earth》2006,42(6):530-535
A method of potential field processing based on the transformation of vectors of the total horizontal gradient in windows of various sizes is considered. The gradients are calculated at the centers of triangles, whose vertices are points of observations, as a rule, of gravity and magnetic fields. Averaging of horizontal gradients of the field rather than initial values of the field is the main distinction of this approach from the known methods. This procedure, referred to in this paper as vector scanning of the field, makes it possible to obtain layer distributions of field sources in a 3-D diagram that is a quasi-density model of the study medium within the framework of certain model concepts. The paper presents a model example demonstrating the possibility of separating the fields produced by two sources located on a vertical line and an example illustrating the application of this method to the interpretation of the gravity field in the zone of the geodynamic influence of the Urals. 相似文献
8.
V. N. Koneshov S. A. Krylov D. S. Loginov V. B. Nepoklonov 《Izvestiya Physics of the Solid Earth》2018,54(6):964-970
This paper addresses the questions associated with using the models in regioning the Earth’s gravity field depending on its roughness and type of anomalies. A formalized technique for zoning based on the analysis of the intensity and variability of gravity anomalies is suggested. The suggested technique includes preprocessing the initial gravity anomalies aimed at eliminating the noise component; partitioning the studied region into the elementary segments; calculating the primary characteristics of the complexity and roughness (the intensity and variability of gravity anomalies) for each segment; and, based on these characteristics, classifying each segment into a particular category of complexity. The proposed system of classification of segments relies on the use of three classes of intensity and three classes of variability of gravity anomalies and four categories of complexity of the regions, which are derived from these classes. As a result of applying the technique, the mapped territory is subdivided into the regions that are uniform in terms of their geophysical properties. The developed technique is used for comparing the quality of the different digital models of gravity anomalies, including the Russian RGM model (A.P. Karpinsky Russian Geological Research Institute (VSEGEI)) and the WGM model (Bureau Gravimétrique International (BGI)) in the region of the Mongol–Okhotsk orogenic belt and Sikhote–Alin fold system. The results of the study can be used for zoning of the other geophysical fields and for planning the locations of the new survey networks for increasing the accuracy of the initial data used for compiling the maps. 相似文献
9.
The development of studies on estimating the accuracy of the Earth’s modern global gravity models in terms of the spherical harmonics of the geopotential in the problematic regions of the world is discussed. The comparative analysis of the results of reconstructing quasi-geoid heights and gravity anomalies from the different models is carried out for two polar regions selected within a radius of 1000 km from the North and South poles. The analysis covers nine recently developed models, including six high-resolution models and three lower order models, including the Russian GAOP2012 model. It is shown that the modern models determine the quasi-geoid heights and gravity anomalies in the polar regions with errors of 5 to 10 to a few dozen cm and from 3 to 5 to a few dozen mGal, respectively, depending on the resolution. The accuracy of the models in the Arctic is several times higher than in the Antarctic. This is associated with the peculiarities of gravity anomalies in every particular region and with the fact that the polar part of the Antarctic has been comparatively less explored by the gravity methods than the polar Arctic. 相似文献
10.
Different variants for interpreting the data of vertical and horizontal channels of GPS measurements are examined during experimental works. The movements of an observation point are imitated experimentally in the vertical and horizontal directions at a geophysical observatory. The experiments are carried out on a pedestal with original benchmarks in both directions. The movements are imitated in the high-frequency range with different time values of movement from one point to another, which did not exceed 1 h. The errors in imaging movements of measurement points according to the results of interpreting the readings of GPS receivers are shown in relation to the benchmark movements of measurement points in the vertical and horizontal directions. These data are processed in the differential mode using the precise point positioning (PPP) method. The experimental results confirm that there is no potential of imaging vertical movements of the Earth’s surface caused by tidal observations according to GPS receiver data. 相似文献