Webinar 22 Satellite Navigation

Talk 1 Introduction to Satellite Navigation PPT and  VIDEO
Talk 2: Principle of Global Positioning System  PPT  and  VIDEO
Talk 3: Global Satellite Navigation Systems PPT and VIDEO
Talk 4: Augmented GPS and LAAS  PPT  and VIDEO
Talk 5: NAVIC (Indian GPS) PPT  and  VIDEO

\Space Education and Research Foundation organised its 22^nd webinar. The topic of this webinar was “Satellite Navigation”. It had five talks by Dr. M. R. Sivaraman (Former Scientist at ISRO). These talks were made live one each on 24^th, 25^th, 26^th, 27^thand 28^thFebruary 2020.

Live transmission Time: 06:00 to 07:00 UT.

Please check time at your location (e.g. in India it will be 11:30 to 12:30 IST)

The topics of these five talks are as follows:

Talk 1: Introduction to Satellite Navigationon Monday 24-02-2020

Talk 2: Principle of Global Positioning System (GPS)on Tuesday 25-02-2020

Talk 3: Global Satellite Navigation Systems on Wednesday 26-02-2020

Talk 4: Augmented GPS and LAAS on Thursday 27-02-2020

Talk 5: NAVIC (Indian GPS) on Friday 28-02-2020

Speaker : Dr. M. R. Sivaraman obtained his PhD at Physical Research Laboratory Ahmedabad in 1974. After Ph. D, he joined Space Applications Centre Ahmedabad (a unit of Indian Space Research Organization). He has worked mainly in development of Geo-receivers and GPS receivers as well as their applications. He conducted Time Synchronization and Ka Band Propagation Experiments. He has worked in two major Satellite Navigation Programs GAGAN and IRNSS.  He was Deputy Project Director for GAGAN. He published more than 50 research papers. After an excellent work over more than three decades, he retired from Space Application Centre and now associated with “Space Tech Consultants”, Ahmedabad. He has great interest in teaching and popularization of space science. He keeps himself updated on the global space programs and share this information with one and all.

Summary of the Talks:

Talk1:Introduction to Satellite Navigation:  What is Navigation and what it provides, Coordinate Systems used in Navigation, Parameters for Required Navigation Performance (RNP) and their values for Land, Maritime and Air Navigation, Brief description of Inertial Navigation System (INS), Brief description of Terrestrial Navigation Systems viz. Hyperbolic Navigation , VOR/DME and ILS. Their Drawbacks. Description of three Basic Elements of a Satellite Navigation System viz. Space Segment, Control Segment and User Segment, Principle of ranging and position determination, Advantages of Satellite Navigation.

Talk2:Principle of Global Positioning System (GPS) : GPS Orbital Configuration, GPS Signal Structure, GPS Satellite Signal Generation, GPS signal Modulation Technique and Signal Structure, Present GPS Operational Satellites, Description of GPS Control Segment, GPS Satellite Signal Power Budget, Types of GPS Receivers, Principle of C/A Code and P Code Receivers, Principle of Carrier Phase measurements, GPS Error Budget. Structure of Hand held and GPS Receiver chips.

Talk 3:Global Satellite Navigation Systems : Advanced GPS, by US Department Of Defence which will replace the existing GPS, GLONASS (Global Navigation Satellite System)  by Russia, Galileo by Europe,Beidou by China, QZSS (Quazi Zenith Satellite System) of Japan, IRNSS (Indian Regional Navigation Satellite System), also known as NAVICby ISRO.

Talk 4:Augmented GPS and LAAS : Principle of Differential GPS (DGPS),Sources of Errors in DGPS, DGPS Error Budget, Basic Principle of WADGPS (Wide Area Differential GPS), Brief description of US WAAS, Europe’s EGNOS, Japan’s MSAS and India’s GAGAN, WADGPS Error Budget and performance of WADGPS, Principle of LAAS (Local Area Augmentation System).

Talk 5:NAVIC (Indian GPS) : What is IRNSS aka NAVIC ?, Importance of NAVIC, Description of NAVIC Space Segment, Control Segment and User Segment, NAVIC Signal Structure and Coverage, NAVIC Satellites, NAVIC User Receiver, Principle of NAVIC, Error Budget, NAVIC Performance, Differential IRNSS, Various Applications viz. Aircraft Navigation, Remote Sensing, Geodesy and Mapping, Location Based Services (LBS), Geographic Information System (GIS), Satellite Meteorology, Ionospheric Studies, IT, Satellite Orbit Determination and Tracking Launch Vehicles etc.