Establishment and Validation of Continuously Operating Reference Stations Geosystems Network on Static and Real-Time Kinematic in Benin City, Nigeria

Abstract

An infrastructure highly treasured by Geomatics Engineers is the continuously operating reference stations (CORS). CORS technology is a complete paradigm shift from the previously known ground control system to a virtual control system. In this paper, we present the steps taken to install CORS Geosystems in Benin City and further test its efficacy by observing fifteen existing control points located far and near using two Tersus GNSS receivers (A&B) concurrently. We perform statistical adjustment using Trimble Business Center software. Successful adjustment took two (2) iterations with Chi square test at (95%) precision confidence level and degree of freedom being nine (9) showed that the result of the adjustment was reliable.  Means of 0.007m, 0.003m 0.000m for Easting, Northings and Heights were obtained while the standard errors (σ) in E, N and H  are 0.003m, 0.007m and 0.000m respectively. The achieved RMS errors obtained from the attempted validation confirmed further that the newly installed CORS is capable of providing reliable 3D geo-spatial data for prospective authorized users to proffer solutions to engineering, scientific, environmental and research driven challenges.