Editing Geosynchronous orbit (section)

====Tundra orbit====
{{main|Tundra orbit}}

The Tundra orbit is an eccentric geosynchronous orbit, which allows the satellite to spend most of its time dwelling over one high latitude location. It sits at an inclination of 63.4°, which is a [[frozen orbit]], which reduces the need for [[orbital station-keeping|stationkeeping]].<ref name="scs">{{cite book|url=https://books.google.com/books?id=PEsmLaDXzvsC&q=tundra&pg=PT110 |section=2.2.1.2 Tundra Orbits |isbn=978-1-119-96509-1 |title=Satellite Communications Systems: Systems, Techniques and Technology|last1=Maral |first1=Gerard |last2=Bousquet |first2=Michel |date=2011-08-24|publisher=John Wiley & Sons }}</ref> At least two satellites are needed to provide continuous coverage over an area.<ref name="jenkin">{{cite conference|title=Tundra Disposal Orbit Study |surname1=Jenkin |given1=A.B. |surname2=McVey |given2=J.P. |surname3=Wilson |given3=J.R. |surname4=Sorge |given4=M.E. |date=2017 |publisher=ESA Space Debris Office|conference=7th European Conference on Space Debris|url=https://conference.sdo.esoc.esa.int/proceedings/sdc7/paper/328|access-date=2017-10-02|archive-url=https://web.archive.org/web/20171002121240/https://conference.sdo.esoc.esa.int/proceedings/sdc7/paper/328|archive-date=2017-10-02|url-status=dead}}</ref> It was used by the [[Sirius XM Satellite Radio]] to improve signal strength in the northern US and Canada.<ref name="Sirius Launch">{{cite web
  | title=Sirius Rising: Proton-M Ready to Launch Digital Radio Satellite Into Orbit
  | url=http://www.americaspace.com/2013/10/18/sirius-rising-proton-m-ready-to-launch-digital-radio-satellite-into-orbit/
  | website=AmericaSpace
  | access-date=8 July 2017
  | date=2013-10-18
  | archive-url=https://web.archive.org/web/20170628043459/http://www.americaspace.com/2013/10/18/sirius-rising-proton-m-ready-to-launch-digital-radio-satellite-into-orbit/
  | archive-date=28 June 2017
  | url-status=live
  }}</ref>