2019 URSI Asia Pacific Radio Science Conference 9-15 March 2019, New Delhi

The International Union of Radio Science (URSI)

Radio science encompasses the knowledge and study of all aspects of electromagnetic fields and waves. The International Union of Radio Science (Union Radio-Scientifique Internationale), a non-governmental and non-profit organisation under the International Council for Science, is responsible for stimulating and co-ordinating, on an international basis, studies, research, applications, scientific exchange, and communication in the fields of radio science.

Included within the objectives are the following:

  1. To encourage and promote international activity in radio science and its applications, for the benefit of humanity;
  2. To encourage the adoption of common methods of measurement, and the intercomparison and standardisation of the measuring instruments used in scientific work;
  3. to stimulate and co-ordinate studies of:
    • the scientific aspects of telecommunications using electromagnetic waves, guided and unguided;
    • the generation, emission, radiation, propagation, reception, and detection of fields and waves, and the processing of the signals embedded in them.
  4. to represent radio science to the general public, and to public and private organisations.

 

One-day Workshop on ‘Global Navigation Satellite System (GNSS)’

Date: March 09, 2019, Saturday | Time: 1000Hrs to 1630 Hrs

Venue:

Prithvi Bhavan, Ministry of Earth Science,
Lodhi Road (Opp. India Habitat Centre),
New Delhi, Delhi 110003, India
Click here for more details

Coordinator:
Dr. Parameswar Banerjee, Former Scientist, CSIR-National Physical Laboratory, New Delhi, India

Co-coordinators:
Professor Ashik Paul, Calcutta Univ. India and Dr. Anindya Bose, Burdwan Univ. India

Talk 1: Over view of  GNSS constellationsSpeaker: Dr. Dinesh  Manandhar

Dr. Dinesh Manandhar is an Associate Professor (Project) at Center for Spatial Information Science, The University of Tokyo, Japan. He obtained Ph. D. from The University of Tokyo in 2001. He did his masters under Space Technology Applications and Research program with majors in remote sensing and GIS from Asian Institute of Technology, Thailand in 1998 and B. E. (Electrical) from Punjab Engineering College, Chandigarh, India.He is one of the developers of IMES (indoor navigation system based on GPS signal). Currently, he is developing GNSS Signal Authentication System based on QZSS for anti-spoofing solutions. His research area includes GNSS signal processing, signal authentication, jamming, interference, spoofing, indoor navigation and software defined radio. He is also involved in education and capacity building on GNSS technology by conducting lectures, trainings, seminars and webinars in many Asian Universities.

Talk2:   GNSS Data Analysis- Promises and Pitfalls
Abstract: The story of GNSS positioning and time transfer techniques is one of steady improvement in both accuracy and improvement. Modelling errors can perturb time and position measurements in a correlated manner, and if they are not simultaneously solved for mis-estimates of either will pull the other. Simple time or frequency transfer between two sites can use Common-View and All-in-View techniques; however more complex techniques yield better estimates. These are carrier smoothing, precise point positioning (PPP), and integer-ambiguity resolution. These techniques must be used with care, as solution-boundary jumps can be introduced. With the advent of new GNSS signals and new GNSS systems, it is possible to merge data to provide still greater precision. Beidou data may suffer from an elevation-dependent bias that can corrupt solutions. Calibration accuracy, necessary for timing accuracy, has also followed a steady development, and methods of achieving consistent as well as absolute calibration will be described.

Speaker: Dr. Demetrios Matsakis

Demetrios Matsakis is Chief Scientist for Time Services at the US Naval Observatory (USNO).  He received his undergraduate degree in Physics from MIT. His PhD was from U.C. Berkeley, and his thesis, under Charles Townes, involved building masers and using them for molecular radio astronomy and interferometry. Hired at the USNO in 1979, he measured variations in the Earth’s rotation and orientation using Connected Element Interferometry and Very Long Baseline Interferometry (VLBI). Beginning in the early 90’s he started working on atomic clocks, and in 1997 was appointed Head of the USNO’s Time Service Department. He has worked on most aspects of timekeeping, published over 150 articles, served on many international commissions, secured one patent, and is past President of the International Astronomical Union’s Commission on Time.

Talk3:  Benefits of GNSS for Ionospheric Research
Speaker: Dr. Patricia Doherty

Patricia Doherty is the Director and Senior Scientist of the Institute for Scientific Research at Boston College. As director of the Institute, she oversees the activities of staff members working on a variety of innovative research projects. As a scientist, Patricia Doherty’s research interests are centered on space weather and ionospheric effects on Global Navigation Satellite Systems (GNSS) and its relevant applications. In addition, Patricia has been very active in promoting research and education in space weather and the science of navigation in developing countries.

Chair: URSI COMMISSION G

Past President: INSTITUTE OF NAVIGATION

Author of over 50 papers in Peer-Reviewed Journals relevant to: Radio Wave Propagation, Received number of professional awards.

Talk 4: GNSS signal threats, vulnerabilities and spectrum protection Issue

Speaker: Dr. Dinesh  Manandhar

Dr. Dinesh Manandhar is an Associate Professor (Project) at Center for Spatial Information Science, The University of Tokyo, Japan. He obtained Ph. D. from The University of Tokyo in 2001. He did his masters under Space Technology Applications and Research program with majors in remote sensing and GIS from Asian Institute of Technology, Thailand in 1998 and B. E. (Electrical) from Punjab Engineering College, Chandigarh, India.

He is one of the developers of IMES (indoor navigation system based on GPS signal). Currently, he is developing GNSS Signal Authentication System based on QZSS for anti-spoofing solutions. His research area includes GNSS signal processing, signal authentication, jamming, interference, spoofing, indoor navigation and software defined radio. He is also involved in education and capacity building on GNSS technology by conducting lectures, trainings, seminars and webinars in many Asian Universities.

 

source:  http://aprasc2019.com/the-international-union-of-radio-science-ursi/

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