AVVISO DI SEMINARIO

terrà un seminario su:

La S.V. è gentilmente invitata a partecipare.inoltre è gradita la diffusione di questo invito achiunque possa essere interessato alla manifestazione.

Il Presidente del Chapter

“Signal Processing & AES”

IEEE Central and South Italy Section

Prof. Gaspare GALATI

BRIEF BIOGRAPHY

Vidal Ashkenazi is Chief Executive Officer of UK based Nottingham Scientific Ltd,and a Fellow of the Royal Academy of Engineering. He was the founding Director ofone of the leading Space Geodesy research institutes in Europe and has supervisedabout 50 doctoral (PhD) students, many of whom now occupy senior positions inuniversities and industry in several countries. Ashkenazi has acted as a Consultant to alarge number of government and commercial organizations around the world, includinga short appointment as Senior Visiting Research Scientist at the invitation of the USNational Academy of Science. He has published well over 500 papers and has beeninvited to give keynote lectures in many international conferences and symposia.Ashkenazi received a medal from the President of the Royal Society in recognition ofhis “significant contribution to the exploitation of GPS in a wide range of scientific andcommercial applications.” Professor Ashkenazi has the degrees of Dr of Philosophy andDr of Science from the University of Oxford in the United Kingdom.

Il giorno 22 marzo 2007 (Giovedì)dalle ore 09:30 alle ore 10:30

Presso l’Università degli Studi di Roma TOR VERGATA

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Aula Convegni della Facoltà di IngegneriaVia del Politecnico, 1

Il prof IDAL SHKENAZIV A

“Satellite Navigation: Past, Present and Future”

INFO: http://radarlab.disp.uniroma2.it

Università degli Studidi Roma - D.I.S.P

D. I. S. P.Joint Chapter

“Signal Processing & AES”

UNIVERSITÀ degli STUDIdi ROMA TOR VERGATA

Centro Vito Volterra

IEEE

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Satellite Navigation:Satellite Navigation:Past, Present and Future Past, Present and Future

Vidal AshkenaziVidal Ashkenazi

CEO, Nottingham Scientific LtdCEO, Nottingham Scientific Ltd

UniversitUniversitàà deglidegli StudiStudi didi Roma Roma TorTor VergataVergata

Roma, 22 Roma, 22 MarzoMarzo 20072007

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Satellite Navigation:Satellite Navigation:Past, Present and FuturePast, Present and Future

CONTENTSCONTENTS

1.1. From Sputnik to Satellite NavigationFrom Sputnik to Satellite Navigation2.2. Global, Regional and Local SystemsGlobal, Regional and Local Systems3.3. Mass Market and Critical ApplicationsMass Market and Critical Applications4.4. Future Challenges for GNSSFuture Challenges for GNSS

Copernicus and Galileo Copernicus and Galileo GalileiGalilei

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Galileo facing the Inquisition Galileo facing the Inquisition

TheodoliteTheodolite VisibilityVisibility

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Satellite VisibilitySatellite Visibility

Satellite TriangulationSatellite Triangulation

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Doppler EffectDoppler Effect

Signal frequency received higher than actual frequency

Signal frequency received is equal to actual frequency when directly overhead

Signal frequency received is lower than actual frequency

TRANSIT Doppler PositioningTRANSIT Doppler Positioning

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Emergence of GPSEmergence of GPS

Around Mid 1980Around Mid 1980 ssPrimarily Military UsePrimarily Military Use

Pseudoranges as Pseudoranges as MeasurementsMeasurements

The First TrulyThe First TrulyGlobal SystemGlobal System

InstantaneousInstantaneousNavigation & PositioningNavigation & Positioning

Later leading to 100Later leading to 100 ssof Civilian Applicationsof Civilian Applications

Differential GPS (DGPS)Differential GPS (DGPS)GNSS Constellation

Reception of GNSS

Signals at a known point

Calculation of Individual

Range Corrections

Transmission of Range Corrections

to Users

Range Corrections are applied to the ranges received from the satellites to

compute absolute position

Enhanced Positional Accuracy

Baseline up to 1000km

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