About exactness of interpolation of heights of geoid (quasigeoid) with the use of modern models of geopotential

In the given article the different modern models of the gravity field of Earth for determination of exactness of interpolation of height of geoid / quasigeoid for space on the territory of Ukraine are examined. With that purpose the comparison of model of geoid and gravity field of Earth for information satellite leveling of 44 points 1 and to 2 classes of geodesic network of Ukraine are executed.The results of researches rotined that a model EGMO8 is the most perfect than all existent models of geopotential for territory of Ukraine. Exactness of height of quasigeoid is characterized at the level of ± 10 sm.     ...

Application of semivariance analysis for estimating So2 concentration in atmospheric air

A characteristic feature of the phenomena occurring in the atmospheric air is the existence of autocorrelation. With tools geostatistics is possible to identify modeling and estimation of the state of contamination of the air. The phenomenon of autocorrelation shows that the results of measurements that are adjacent to each other in time and space are more alike than more distant measurements. The existence of autocorrelation time can be the basis for estimating the value of the measurement location. To study the autocorrelation time gas concentrations and aerosols used semivariance analysis. Knowledge of semivariance parameters allows you to use the best uncompressed linear estimation method which is kriging. The paper presents an example of application semivariance analysis of ambient air quality status for the area of the province. An evaluation of spatial and temporal autocorrelation in the Silesia province based on the basic parameters such as range of impact , and the effect of the threshold nuggets. The analysis results show the semivariance as a function of the linear relationship between distant the points and the degree of their similarity. The existence of spatial autocorrelation provides a basis for modeling and estimation using stochastic methods. ...