عنوان مقاله [English]
نویسنده [English]چکیده [English]
This paper is a review of the analysis of the GPS-based observations conducted to exactly determine the relative coordinates of points of two crust deformation control networks on the western coast of Canada. Following the description of the networks and timing of the observations, the software used to process the information was investigated and, following that, the typical errors of determining the relative position by the GPS were discussed. By comparing the pure open-length results and overall network adjustment, internal compatibility of GPS positioning for both networks was assessed. The result was that the compatibility of horizontal coordinates was better than that of vertical coordinates by a coefficient of about three; using standard atmospheric information for one of the networks located in the mountainous area improved the compatibility of horizontal coordinates. The results by network adjustment of the GPS were compared by those from adjustment of EDM ground observations according to open lengths, and their comparison revealed a relative comparison coefficient of 0.5 PPM with a residual difference (RMS) of 8 mm. With the precision of such a GPS control network, it is possible to determine the accumulated space over the next five years.