1. the art that the invention set forth in the claims ; The present invention relates to a regional way will ionospheric modeling errors and error correction using the same method. ; 2. The invention is to solve the technical challenges ; The invention, which by, creating a regional ionospheric error modeling to enable the observation error correction in real time in order to be able to correct for ionospheric error being the largest error source to the user to use a single frequency, to occur the precise positioning and regional ionospheric modeling errors and how to provide the error correction using the same method that is its purpose. ; 3. The gist of the solution of the invention, ; The present invention, in the method ionospheric modeling errors at the reference station at all times, collecting the GPS data from the local station at all times with a dual frequency GPS receiver in real time; The coordinates of the latitude / longitude sun-change in geomagnetic coordinates, dividing the grid points depending on the latitude and longitude, the total number of electrons collected for each time the sun - the base function and tilt function for each grid point on the geomagnetic coordinate system converting in accordance with; The total electron number determination step of determining the signal delay and the total number of electrons through the ionosphere through a Kalman filter by applying a weight to the total number of electrons of the coordinate system transformation; And change the total number of electrons is determined by the number of local electron gun on the geographic coordinate system, the local latitude total number of electrons for the time, a step of modeling for the hardness, height. ; 4. important use of the invention ; Yiyongdoem etc. The present invention location-based systems. ; GPS, a single frequency, the total number of electrons, regional ionospheric modeling, dual frequency
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