Determination of the geoid – gravity field and topography of the Black sea according to the satellite altimetry data
Journal Title: Геодезія, картографія і аерофотознімання - Year 2015, Vol 81, Issue 1
Abstract
Objectives. The method of satellite altimetry as a relatively new approach to precise satellite surveying, which provides the different Earth sciences by a most complete information about the state of the ocean and its changes over time. In particular this method uses in scientific researches of geodesy, oceanography and climatology. The models of ocean dynamic topography are based on the altimetry data also. Methodology. With the modern of satellite technology the oceans surface is mapped with a very simple approach, which are based on altimetric satellite measurements of different missions with the level of accuracy 1–5 cm. Distance measuring from altimetry satellite to the ocean surface and determining its position in the space based on SLR, GNSS, or DORIS technologies open the possibility of calculating the Sea Surface Heights passed over the ocean surface reference ellipsoid. Heights of the ocean CorSSH are estimated based on the previous SSH data processing. Which are govered by different corrections for the environment and the impact of various geophysical factors to initial dependent time information. These corrections the most impact is caused by the tidal effect of the Sun and the Moon. Tidel effects consist to from two parts: the ocean tide and the tide of the solid Earth. The ocean tide is an instant deviation of the ocean surface relative to its average value. The middle surface, for example, can be the surface which is defined according to observations of a tide gauge. Undisturbed ocean surface was named the geoid or primary level surface and is one of the most important referential surfaces in geosciences. In 1983 according to the resolution of IAG the geoid surface was constract taking into account indirect tides of the solid Earth. The practical significance. The amplitudes of the geoid heights have obtain using to CorSSH as with respect to GRS80 system are not more than 100 m. Another situation occurs in the oceanography, where the most valuable data are ocean surface deviations from geoid with the amplitude of 2 m this data are called Sea Surface Topography (SST). Results. Thus, this paper focuses on the problem of constraction filtered heights SSH, field heights gravity anomalies, construction and calculation gravimetric quasigeoid, calculation of the stationary model of the sea topography (SST). In all cases the procedure of remove/restore was edopted based on the atellite-only GOCE gravitational field up to degree \ order 250.
Authors and Affiliations
A. N. Marchenko
Keywords
Related Articles
- EP ID EP484591
- DOI 10.23939/istcgcap2015.01.046
- Views 135
- Downloads 0
Construction of the normal equations matrix for modeling of local gravitational field
We consider the method of constructing the local gravity field using nonorthogonal basic functions, which are solution of the Laplace equation in spherical cap or spherical segment. This approach involves using of associ...
Analysis of the results of the use UAV Trimble UX-5 for creation of orthophotomaps and digital model of relief
Purpose. The purpose of this paper is to analysis and research capabilities of unmanned aerial vehicle (UAV) Trimble UX5 to create orthophotomap and digital elevation models (DEM), as well as identifying and addressing p...
GIS technologies in the analysis of wind energy development projects in the precarpathian region
Purpose. Among the investment projects related to economic development in the region, special attention is drawn to projects that involve a significant amount of land allocation, valuable because of their ecological stat...
Terms qa decryption railway transport data using digital aerial photography
Objective. The aim of this study is a reasonable definition of the conditions which must be satisfied for digital aerial image for high-quality recognition objects of rail transport with the aim of creating a plan with s...
Efficiency of application of satellite technology when performing land and cadastral works in settlements
Purpose. The purpose of this work is to study the effectiveness of using satellite technology in real-time kinematics mode for work performed to determine the areas of land of different size within a settlement. Methodol...