Innhold

2
2.15.1 Solsynkrone baner .............................................................................................. 26
2.15.2 Levetid for lavbanesatellitter. ............................................................................ 27
2.15.3 Baner med høy inklinasjon, Molniya‐baner ....................................................... 27
2.16 TLE, datasett for satellittbaner. ............................................................................. 30
2.17 Dato og tid. ............................................................................................................. 31
2.17.1 Klokkeslett .......................................................................................................... 31
2.17.2 Juliansk Datum ................................................................................................... 31
3 ROMTRANSPORT .............................................................................................................. 33
3.1 Hva kreves for å skyte opp en satellitt? .................................................................... 33
3.2 Rakettligningen .......................................................................................................... 33
3.3 Rakettdrivstoff ........................................................................................................... 35
3.3.1 Fast drivstoff ....................................................................................................... 36
3.3.2 Flytende brennstoff ............................................................................................ 37
3.3.3 Den kjemiske sammensetning for rakettdrivstoff ............................................. 37
3.4 Ionemotorer .............................................................................................................. 37
3.5 Eksempel på rakettsystem, ARIANE 5 ....................................................................... 38
3.6 Plassering av satellitter i geostasjonær bane. ........................................................... 39
4 Miljøet i rommet .............................................................................................................. 40
4.1 Miljøfaktorer .............................................................................................................. 40
4.2 Jordens magnetfelt. ................................................................................................... 41
4.3 Varmestråling fra sola og jorda. ................................................................................ 42
4.3.1 Soltemperaturen ................................................................................................ 42
4.3.2 Albedo ................................................................................................................ 42
4.4 Varmestråling fra jorda .............................................................................................. 43
4.5 Nøytral atmosfære, vakuum ...................................................................................... 43
4.6 Ionisert atmosfære, plasma ....................................................................................... 43
4.7 Høyenergi partikkelstråling. ...................................................................................... 44
4.8 Van Allenbeltene ....................................................................................................... 44
4.9 Gjenstander i rommet ............................................................................................... 45
5 PLATTFORMTEKNOLOGI ................................................................................................... 46
5.1 Funksjoner ................................................................................................................. 46
5.2 Retningskontroll ........................................................................................................ 47