Comparison of approaches to zenith tropospheric delay determination based on data of atmosphere radio sounding and GNSS observation
Journal Title: Геодезія, картографія і аерофотознімання - Year 2018, Vol 88, Issue 2
Abstract
Currently, Global Navigation Satellite Systems (GNSS) are increasingly used in atmospheric monitoring tasks. To determine tropospheric delays, two approaches are most often used: the calculation of atmospheric radio sounding data and the processing of GNSS observations. GNSS processing is, generally, based on two methods, namely precise point positioning (PPP) and double-differencing (DD). PPP is a potent data analysis instrument sensitive to a variety of parameters. This paper demonstrates that PPP can be used not only for positioning and navigation but also for other atmospheric monitoring tasks. Purpose. Realization of a comparative analysis of various approaches for tropospheric delays determination based on the results of GNSS observations processing by the PPP and DD methods, and on atmospheric radio sounding data. Methodology. The observation data from following GNSS stations were used: BUCU (Bucharest, Romania), GANP (Ganovce, Slovakia) and GLSV (Kyiv, Ukraine), as well as, located nearby, aerological stations 15420 (Bucharest, Romania), 11952 (Poprad-Ganovce, Slovakia), 33345 (Kiev, Ukraine). Therefore, in this work the zenith tropospheric delay () determination is performed according to GNSS observation data using the PPP method with the application of the software package GIPSY-OASIS and the DD method by means of the Bernese GNSS Software and GAMIT-GLOBK software packages. The obtained results were compared with the corresponding radio sounding data. Results. The values obtained using different approaches correspond to a sub-centimeter level of accuracy with respect to radio sounding data, while the best results were obtained by the PPP method at Slovak stations (millimeter level), where the distance between the location of the aerological and GNSS stations is less than 1 km, i.e. they are in the same atmospheric conditions. This suggests that the PPP method provides a better level of accuracy and can be used precisely to determine tropospheric delays. Scientific novelty, practical significance. The technology of continuous atmospheric monitoring using GNSS stations and observations processing technology from these stations based on the absolute positioning PPP. The obtained results after their completion can be used in thoughtful investigations of tropospheric effects through GNSS observations and for numberous atmospheric monitoring applications.
Authors and Affiliations
S. Savchuk, N. I. Kablak, A. Khoptar
Keywords
Related Articles
- EP ID EP484475
- DOI 10.23939/istcgcap2018.02.024
- Views 93
- Downloads 0
Technological features of creation of a large-scale topographical plan of Lviv city landfill using combined method
Purpose. The compliance with maintenance requirements of a landfill is an important factor that have affects on its functioning. The functioning of Lviv city landfill started in 1959 and continued till 2016. According t...
Geoinformation technology of the master plan geospecial profile data sets development
Purpose. The purpose of the research is development of an object-oriented geoformation model of settlements master plans geospatial profile data sets. The topicality of the research is due to the need to meet the current...
Errors in cadastral data exchange files – case study
Purpose. Given the importance of the land cadastre, the quality of the cadastral exchange file plays an extremely important role, both for the land cadastre and for all other cadastres as a whole. Despite the widespread...
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...
Experimental cartographic modeling of dynamics of landslides areas according to geodesic observations
Aim. The aim of the paper is the development of methodological positions and practical recommendations concerning experimental and cartographic modeling of dynamics of active landslide area on the basis of serial geodesi...