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Pólbraut

Gervitungl sem eru á pólbraut hringsóla yfir norðlægu svæði jarðarinnar. Það eru margar pólbrautir og eru þær staðsettar á milli 100 og 1000 km frá yfirborði jarðar. Hringsól gervitunglanna á pólbrautunum er yfirleitt stutt eða um það bil ein til þrjár klukkustundir.

Mörg gervitungl eru staðsett á pólbrautunum (t.d. Landsat kerfið) sem og Alþjóða geimstöðin (International Space Station Alpha).

Dæmi um hvernig Landsat gervitungl ferðast um pólbraut.

 

 

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