Viktor Statov
@karsu.uz
GIS Center
Karakalpak State University
RESEARCH INTERESTS
Physics, Environmental modelling, Spatial Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Lorant Foldvary, Victor Statov, Nizamatdin Mamutov, Sanjar Khikmatullaev, and Muxammadyusuf Ergashev
EDP Sciences
The GRACE large-scale sequent GRACE-FO gravity satellite mission is providing monthly gravity field solutions for almost 20 years enabling a unique opportunity to monitor large-scale mass variation processes. The gravity anomaly time series for the Aral Sea region has been derived for the period of April 2002 to January 2022. The method of determining gravity anomaly time series from GRACE and GRACE-FO monthly solutions has been improved by taking into account the mass variations of the Caspian Sea. The gravity anomaly time series then has been compared to mass anomaly estimates. For deriving mass anomaly, beyond the available water volume data, density variations were determined by taking into account salinity and temperature changes. Unfortunately, no reliable information either on the salinity or on water temperature changes is available or accessible. Furthermore, not only the data but also the methodology of determining the density is not reliable. Still, the tests suggest that slight improvement in correlation due to the involvement of salinity information occurs.
Mamanbek Reimov, Nizamatdin Mamutov, Polat Reymov, Viktor Statov, Yakhshimurad Khudaybergenov, Oralkhan Sultashova, and Bibigul Tleumuratova
EDP Sciences
The possibility of building a regional system for assessing the climatic potential and agroclimatic zoning using geoinformation approaches and specialized description language CSML (Climate Science Modelling Language) for the Southern Aral Sea basin. Modern approaches to the construction of agroclimatic zoning systems using ground-based and space-based monitoring are discussed. The necessity of combining geoecological and bioclimatic zoning of the territory using spatial databases is shown.
Lorant Földváry, Victor Statov, and Nizamatdin Mamutov
LLC Kartfond
The GRACE gravity satellite mission has provided monthly gravity field solutions for about 15 years enabling a unique opportunity to monitor large scale mass variation processes. By the end of the GRACE, the GRACE-FO mission was launched in order to continue the time series of monthly gravity fields. The two missions are similar in most aspects apart from the improved intersatellite range rate measurements, which is performed with lasers in addition to microwaves. An obvious demand for the geoscientific applications of the monthly gravity field models is to understand the consistency of the models provided by the two missions. This study provides a case-study related consistency investigation of GRACE and GRACE-FO monthly solutions for the Aral Sea region. As the closeness of the Caspian Sea may influence the monthly mass variations of the Aral Sea, it has also been involved in the investigations. According to the results, GRACE-FO models seem to continue the mass variations of the GRACE period properly, therefore their use jointly with GRACE is suggested. Based on the justified characteristics of the gravity anomaly by water volume variations in the case of the Aral Sea, GRACE models for the period March–June 2017 are suggested to be neglected. Though the correlation between water volume and monthly gravity field variations is convincing in the case of the Aral Sea, no such a correlation for the Caspian Sea could have been detected, which suggests to be the consequence of other mass varying processes, may be related to the seismicity of the Caspian Sea area.
J. Breza, M. Kadlečíková, R. V. Konakova, V. G. Lyapin, V. V. Milenin, V. A. Statov, Yu. A. Tkhorik, and M. Yu. Filatov
AIP Publishing
We report on the influence of 60Co gamma‐radiation upon the properties of Cr‐GaAs diode structures. Auger depth profiling proved that while a low dose of radiation made the transition region wider, higher doses caused its narrowing. Radiation treatment affected the Schottky barrier height and ideality factor favourably.