from 01.01.2014 until now
UDC 528.855
CSCSTI 36.16
Satellite altimetry is an effective way to study the Earth’s gravity field, the behavior of the World Ocean and to observe climate change. This is facilitated by the global distribution of measurements and their high accuracy. To obtain high-precision altimetry measurements, it is necessary to take into account the errors of a significant number of parameters affected by the state of the atmosphere, the sea surface and internal instrument delays of the altimeter. The residual error after taking into account all error sources is determined using external calibration. Most often, buoys with receivers of global navigation satellite systems are used for external calibration. This article discusses ways to improve the existing altimeter calibration methodology. To improve the calibration, it is proposed to use one of the tools of geoinformatics – geoinformation monitoring. Using geoinformation monitoring to build an information model of the sea surface, it is possible to take into account the influence of the most complex factor – sea surface anomalies or dynamic topography. The article proposes options for changing the number of measuring systems and rules for their application. To implement geoinformation monitoring, a method for constructing a geoinformation model of the sea surface using second-degree polynomials is studied. The results of experimental studies on the calibration of a satellite altimeter using the geoinformation monitoring method are presented.
gravitational field, space geodetic system, satellite altimeter, external calibration, sea surface height, geoinformation monitoring
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