Monitoring of the tropospheric water vapor in the western cross-border zone of Ukraine
Journal Title: Геодезія, картографія і аерофотознімання - Year 2016, Vol 83, Issue 83
Abstract
Aim. Identifying of reliable estimates of zenith tropospheric delay (ZTD) by the data of GNSS observations (remote monitoring of the troposphere) on the active reference stations of the west cross-border zone of Ukraine. Methods. The zenith tropospheric delays, and their direct link with integrated / precipitated water vapor are important products that are obtained in GNSS-meteorology. They allow to get the rapid information for numerical weather prediction. The reliability of the estimates of the integrated / precipitated water vapor from the GNSS data analysis is one of the main problems in the use of these results. Accordingly, strategy of analysis GNSS data should provide such ZTD estimations, which meet requirements of GNSS-meteorology. The determination of ZTD values was grounded traditionally on data analysis in the mode of packet network solution using least square method and observation technique which based on double differencing (DD) in the NRT mode. The absolute method of PPP which required precise corrections for satellite clocks together with predicted orbits, wasn’t applied practically. From point of view of analysis strategy of GNSS data the PPP method is popular thanks to creating by the International GNSS Service (IGS) and others institutions of a such products as accurate satellite orbits and clock corrections in RT mode. For comparing the ZTD data, obtained by the packages NRT-DD Bernese GNSS software and RT-PPP ALBERDING GNSS STATUS Software were selected for the February-March of 2016. The maximum amount of data at each observation station (2880 values) was by the selection criterion in this period. 17 GNSS stations were selected for comparison. The graphs of ZTD change over this period have been constructed for each station, as well as the hour changes of ZTD differences obtained by two packages. Results. Comparison results established the following: the use of different processing strategies GNSS data not significantly affect on the accuracy of zenith tropospheric delay. The obtained estimates of 1-2 cm fully satisfy the requirements for the indicated product in meteorology and climatology. Scientific novelty. The realized studies of two fundamentally different processing strategies GNSS data revealed the real accuracy of the zenith tropospheric delay, which allows to consider the results more reliable in comparison with results obtained by other researchers. Practical significance. Estimated values of ZTD obtained from a regional network of permanent GNSS stations of the western cross-border zone of Ukraine can become a valuable information in problems of numerical weather prediction.
Authors and Affiliations
S. Savchuk, F. Zablotskyi
Keywords
Related Articles
- EP ID EP193247
- DOI -
- Views 121
- Downloads 0
Cadastral land zoning
Purpose. Cadastral land zoning is one of the important components of creating a cadastral system in Ukraine, which helps to create an attractive investment climate and to define the priority areas of sustainable economic...
Application of remote sensing methods to evaluation of soil fertility indicators of Zakarpattia lands
Aim. Identification and evaluation of the soil fertility indicators based on processing of the data of on-ground and remote sensing research on the agricultural lands of different landscape zones in Zakarpattia. Меthodol...
Evaluation of three-dimensional deformation fields of the earth by methods of the projective differential geometry. Rigid rotations of the Earth
Aim. The aim is this research is the evaluation of the Earth’s rigid rotation as a component of global deformation fields in interconnection with angular distortions of the geocentric spatial coordinate system. Methodolo...
Analysis of stability of points of automated geodetic monitoring of engineering structures Kanev HPP
Aim. As part of the project of renovation of hydropower plants on the Kanev hydropower plants (HPP) the experts of Leica Geosystems together with Ukrhydroenergo had created a system of automated geodetic monitoring compr...
Research geometric distortion digital SEM-images obtained on SEM JSM-7100F (JEOL, Japan) and the accuracy of their approximation
Purpose. Digital-SEM image, due to various physical factors of scanning electron microscope inherent significant geometric distortion. The aim of this study is to establish and Effective consideration to improve the accu...