Application of GPS technique to calibration of satellite images

This paper presents the results of accuracy of static GPS method used for calibration of satellite images to produce maps on a scale of 1:50000. The analysis of accuracy covers dual-frequency ionospheric-free solutions which were used in elaboration of GPS data. The vectors in length from 40 to 290 kilometers and short fifteen-minute sessions or GPS observations were used. The GPS measurements were performed in the summer 2002 in the part or Poland including about 700 control points. The work was performed in cooperation with Tbe Baltic Center SJP company. The GPS measurements were carried out with various GPS receivers such as: Ashtech MD-12, Ashtech Z-12, Ashtech FX, Asbtech Z-Surveyor. In our case the required accuracy or control points should be better than one meter.