Yazar "Musa, Tajul" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Deformation Analysis Based on Designed Experiments and Kalman Filter
    (Croatian Geodetic Soc, 2014) Eyo, Etim; Bayrak, Temel; Musa, Tajul; Onuigbo, Ifeanyi; Kuta, Abdullahi; Odumosu, Joseph
    This paper is focused on the deformation monitoring of survey control points in the Gidan Kwano main campus, Federal University of Technology, Minna, Nigeria. The main objectives are to develop and test a kinematic deformation analysis model using simulated GPS test data. RTK GPS was the main equipment deployed for the monitoring. The kinematic deformation analysis model developed for this study was based on Kalman filtering technique. In order to verify the developed kinematic model, designed experiments, with artificially introduced deformations, were performed to test centimetre-level horizontal movements on four points (GPS 01, GPS 08, GPS 09 and GPS 12). The developed kinematic model was used to determine six unknown parameters of movements, namely position displacements (dx, dy), velocities (Vx, Vy) and accelerations (ax, ay). The results of the computed movement parameters of the control points show that the introduced deformations were detected by the kinematic deformation model. The model also detected that there was no deformation introduced to point GPS 09. Some of the discrepancies in the computed results can be attributed to centring errors during observations.
  • [ X ]
    Öğe
    DEVELOPMENT OF AN ALTERNATIVE LOW-COST LANDSLIDE MONITORING METHOD USING DATA FROM TUSAGA-AKTIF GNSS NETWORK
    (Univ Federal Parana, Centro Politecnico, 2015) Bayrak, Temel; Eyo, Etim; Basoglu, Nesat; Musa, Tajul; Akpee, Dinebari
    The main objectives of this paper are to develop a kinematic deformation analysis model for landslides using Kalman filtering procedures; and to utilise the observations from TUSAGA-Aktif GNSS Network in Turkey to determine the velocity fields of a landslide study area in the Eastern Black Sea Region of Turkey. Thirty five (35) points were established for the determination of 3D time dependent velocities of the landslides study area. Point displacements and velocities were determined by single point kinematic model to perform 3-D statistical analysis, and to assess the significance of point displacements and velocities using three periodic observations from TUSAGA-Aktif Network. The determined velocities were used to generate the velocity fields of the landslide area for three epochs using Geographic Information System (GIS). The results obtained indicate that almost all the monitored points showed significant movements, with varying magnitudes of velocities. The directions of movement of the 35 monitored points were also determined. The results show that the dominant trends of landslide movements in the study area are in the northwest and northeast directions. These results are in agreement with the previous results obtained in the same study area about ten years ago.