SEARCH FOR ERRORS IN THE BASE OF NAVIGATION DATA BY THE METHOD OF SPLINE ISOSURFACE VISUALIZATION

It is proposed to optimize a posterior accuracy estimation of the navigation parameters cluster by spline synthesis of the isosurface of the digital array in order to search for errors in the measurement database. Structured numerical information is visualized by means of computer graphics in an evident geometric form. Reliable error detection from the base of navigation data based on the wavelet fluctuation of an erroneous geometric image is provided. Axonometric visualization of the navigation isosurface on a computer screen is based on the parallel projection method. A gallery of six display copies demonstrates the productivity of the numerical experiment. In parallel, two tables present fragments of a hypothetical base of accurate and erroneous data. The essence of the performed test is to artificially initiate two errors simulated by manual correction of the digital data file. Detected graphical improvisations of errors can be operatively corrected in the numeric data file, since the approximate segment of the tabular errors presence sets their geometric image. The absence of peaks on the computer display guarantees synchronous absence of errors in the database and in this case there is no need to carry out search activities. In order to implement the practical possibility of manipulating the synthesized isosurface, four coefficients for controlling the shape of the geometry of the engineered electronic perspective are introduced into the software module. Variation of one of the four coefficients assists to conduct the further analyzing the measurement data in order to distinguish the heterogeneity of digital values from their error. The proposed approach allows you to obtain a compromise solution if it is impossible to formulate formal criteria for fuzzy logic of searching for errors in the database. Based on empirical analysis, an expert assessment of the accuracy of any base of navigation data is performed.

base of navigation data, visualized isosurface, geometric image of error, parallel projection, wavelet fluctuation of error, fuzzy search for error

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