Comparative Analysis of the Techniques for Estimation of GPS DOP over Indian Region

Abstract

Estimation of Dilution of Precision (DOP) plays an important role in aviation, terrestrial and marine navigation applications. In this paper results due to four techniques to estimate DOP namely, Kihara’s method, ‘all-in-view’ SVs, ‘best-5’ SVs and ‘best-4’ SVs are investigated. Experiments are performed using Novatel (DL-4plus) GPS receiver and the collected data is used for the analysis. Bancroft algorithm is used to find preliminary position of the receiver. Using this position of the receiver and satellite coordinates, DOP is estimated. Comparative analysis of the specified techniques is performed. For most of the time, DOP values due to ‘all-in-view’ SVs are found as the best.

Keywords:

• DOP
• GPS
• navigation

Additional information

Notes on contributors

Quddusa Sultana

Quddusa Sultana graduated in Electronics and Communication Engineering from Osmania University in 1994 and M Tech in Digital Science and Computer Engineering from JNTU in 2001. Presently she is Associate Professor in DCET, Hyderabad. She has 14 years of teaching experience. She has several publications to her credit. Her present areas of interests include GPS, GAGAN, IIRNSS and Pseudolites. E-mail: [email protected]

Dhiraj Sunehra

Dhiraj Sunehra graduated in Electronics & Communication Engineering from CBIT, Hyderabad in 1997, and M. Tech. in Digital Systems & Computer Electronics from JNTU, Hyderabad in 2001. He has 7 years of teaching experience in MGIT/CBIT, Hyderabad. Later he joined NERTU, Hyderabad as a Research Scientist. His areas of interest includes GPS, SBAS, Ionospheric delay, and Instrumental bias estimation. He has several publications to his credit. E-mail: [email protected]

A. D. Sarma

A D Sarma is Ph D. in Electronic and Electrical Engineering from London University (UK) in 1986. He was associated with DEAL, Dehradun, Electrical Engineering Dept. of IIT, New Delhi, DLRL, Hyderabad, Telecommunications Division, Electrical Engineering Dept of. Eindhoven University of Technology, The Netherlands Wave propagation Laboratories, NOAA, Boulder, U.S.A. He has about 25 years of experience in the areas of GPS, Radio Wave propagation and Mobile Communication. He has been guiding several Ph.D students in these areas. He has more than 160 papers to his credit. Presently he is the Director for the Research and Training Unit for Navigational Electronics (NERTU), Osmania University, Hyderabad. E-mail: [email protected]

P. V. D. Somasekhar Rao

P. V. D. Somasekhar Rao received his M.Tech. and Ph.D. degrees from IIT, Kharagpur in 1979 and 1990 respectively. He worked as Senior Research Asst. in Radio Centre of IIT, Kharagpur and served as Electronics Engineer in Radio Astronomy Centre Group, Tata Inst. of Fundamental Research, Ootcamund. He joined the Faculty of ECE Dept. at JNTU in 1981 and became the Professor and Head of ECE Dept. He is presently working as Professor of ECE at JNTU, Hyderabad. He has more than 25 years of Teaching/Research experience and has published more than 20 Research papers in IEEE, IEE, JEWA, IETE journals and International/National conferences. He has been on the visiting Faculty of at the School of Engineering, Assumption University, Bangkok, during 1997–99. He is a Fellow of IETE (India), Life Member of ISTE (India) and a Senior Member of IEEE. E-mail: [email protected]