Lecture 11

Satellite Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Classical satellite systems base station or gateway Inter Satellite Link (ISL) Mobile User Link (MUL) Gateway Link (GWL) footprint small cells (spotbeams) User data PSTN ISDN GSM GWL MUL PSTN: Public Switched Telephone Network

Classical System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Classical System ,[object Object],[object Object]

Satellite Orbits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Satellite Orbits ,[object Object],[object Object]

Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Satellite period and orbits 10 20 30 40 x10 6 m 24 20 16 12 8 4 radius satellite period [h] velocity [ x1000 km/h] synchronous distance 35,786 km

Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Loss of Power ,[object Object],[object Object],[object Object],[object Object]

Inclination inclination   satellite orbit perigee plane of satellite orbit equatorial plane

Elevation Elevation: angle  between center of satellite beam and surface  minimal elevation: elevation needed at least to communicate with the satellite footprint

Link Budget of Satellites ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Atmospheric Attenuation Example: satellite systems at 4-6 GHz elevation of the satellite 5° 10° 20° 30° 40° 50° Attenuation of the signal in % 10 20 30 40 50 rain absorption fog absorption atmospheric absorption 

Orbits I ,[object Object],[object Object],[object Object],[object Object],[object Object]

Orbits II earth km 35768 10000 1000 LEO (Globalstar, Irdium) HEO inner and outer Van Allen belts MEO (ICO) GEO (Inmarsat) Van-Allen-Belts: ionized particles 2000 - 6000 km and 15000 - 30000 km above earth surface

Geostationary satellites ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Geostationary satellites ,[object Object],[object Object],[object Object]

LEO systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MEO Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Routing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Localization of Mobile Stations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Handover in satellite systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ISRO ,[object Object],[object Object],[object Object],[object Object]

ISRO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ISRO ,[object Object],[object Object]

Indian National Satellite System (INSAT ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Indian National Satellite System (INSAT ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Indian Remote Sensing Satellite (IRS) System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Indian Remote Sensing Satellite (IRS) System ,[object Object],[object Object],[object Object]

Stretched Rohini Satellite Series (SROSS) ,[object Object]

Polar Satellite Launch Vehicle (PSLV ,[object Object],[object Object],[object Object],[object Object]

Polar Satellite Launch Vehicle (PSLV ,[object Object],[object Object],[object Object]

Geosynchronous Satellite Launch Vehicle (GSLV ,[object Object],[object Object]

Geosynchronous Satellite Launch Vehicle (GSLV ,[object Object],[object Object],[object Object]

Lecture 11

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Lecture 11