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5.19 Eksempel på utforming av satellitter ..................................................................... 66<br />
5.19.1 Eksempel 1: Rotasjonsstabilisert satellitt. ......................................................... 66<br />
5.19.2 Treaksestabilisert satellitt, OLYMPUS (ESA). ...................................................... 68<br />
6 SATELLITKOMMUNIKASJON ............................................................................................. 69<br />
6.1 Informasjonsbegrepet ............................................................................................... 69<br />
6.2 Modulasjon ................................................................................................................ 72<br />
6.3 Feilkorrigerende koder .............................................................................................. 74<br />
6.3.1 Blokkoding .......................................................................................................... 74<br />
6.3.2 Fodingskoding .................................................................................................... 75<br />
6.4 Satellitter som “hjelpere” for radiobølgene? ............................................................ 75<br />
6.5 Satellittranspondere .................................................................................................. 76<br />
6.6 Dekningsområder og antenner. ................................................................................. 78<br />
6.7 Effektforsterkere og EIRP .......................................................................................... 79<br />
6.8 Transponderutforming. ............................................................................................. 81<br />
6.9 Regenererende satellitt ............................................................................................. 82<br />
6.10 Switsjer i rommet ................................................................................................... 82<br />
6.11 Eksempel: Linkbudsjett .......................................................................................... 82<br />
7 Jordobservasjon ............................................................................................................... 86<br />
7.1 Anvendelse ................................................................................................................ 86<br />
7.2 Overføringskanalen, spektrale vinduer. .................................................................... 87<br />
7.3 Fundamentale begrensninger i oppløsning ............................................................... 88<br />
7.4 Syntetisk apertureradar (SAR) ................................................................................... 90<br />
7.5 Eksempel: SAR‐systemet på Envisat 1 ....................................................................... 91<br />
7.6 Jordobservasjonssatellitter ........................................................................................ 92<br />
7.6.1 Valg av baner ...................................................................................................... 92<br />
7.6.2 ERS‐satellittene .................................................................................................. 92<br />
7.6.3 ENVISAT .............................................................................................................. 93<br />
7.6.4 Meteorologiske satellitter, Meteosat ................................................................ 94<br />
8 SATELLITTNAVIGASJON .................................................................................................... 96<br />
8.1 Bakgrunn .................................................................................................................... 96<br />
8.2 Måleprinsipp for posisjonsbestemmelse .................................................................. 97<br />
8.2.1 Vinkelmålinger .................................................................................................... 98