Evaluation of Tropospheric & Clock Errors for Precision GPS Positioning & Navigation
VC. Vishnu Vardhan Reddy1, M. Manohar Reddy2, G. Akshitha3, K. S. Ramesh4, R. Revathi5
1VM. Manohar Reddy, Student, Department of Electronics and Communication, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India.
2M. Manohar Reddy, Student, Department of Electronics and Communication, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India.
3G. Akshitha, Student, Department of Electronics and Communication, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India.
4Dr.K.S. Ramesh, Professor, Department of Electronics and Communication, Faculty of Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India.
5Dr. R. Revathi, Associate Professor, Department of Electronics and Communication, Faculty of Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, India.
Manuscript received on 11 March 2019 | Revised Manuscript received on 19 March 2019 | Manuscript published on 30 July 2019 | PP: 882-887 | Volume-8 Issue-2, July 2019 | Retrieval Number: A3404078219/19©BEIESP | DOI: 10.35940/ijrte.A3404.078219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Positional inaccuracies in GPS are caused by severalerrors such as Ionospheric, Tropospheric, Satellite Clock, Receiver Clock etc., Instantaneous correction of these error aids in precise navigation. In the present work Original Hopfield model is considered for the tropospheric correction. The instantaneous tropospheric correction results in more precise position using GPS. The decreasing order of components on basis of effect are Ionospheric delay, Tropospheric delay, Clock error, satellite bias error, Receiver error, multipath error, Ephymeris error, random errors etc. It is a time taken process to calculate the individual error separately.so in this paper we only concentrated on simulation and analysis the tropospheric delay, clock error, ephemeris error. We used Modified Hopfield model to analysis Tropospheric delay, receiver instrumental bias for analysis Clock error in between we eliminate Ephymeris error, after obtained results are compared with and without time correction in original Hopfield model.
Index Terms: Clock Error, Ephymeris Error, Global Positioning System (GPS), Original Hopfield Model, Tropospheric Delay
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