Editing Syncom (section)

=== Common features ===
The three early Syncom satellites were experimental spacecraft built by [[Hughes Aircraft Company]]'s facility in [[Culver City, California]], by a team led by [[Harold Rosen (electrical engineer)|Harold Rosen]], Don Williams, and Thomas Hudspeth.<ref>{{cite news |last=Wichter |first=Zach |date=February 2, 2017 |title=Harold Rosen, Who Ushered in the Era of Communication Satellites, Dies at 90 |url=https://www.nytimes.com/2017/02/02/business/harold-rosen-dead-engineer-satellite.html |work=The New York Times}}</ref> All three satellites were cylindrical in shape, with a diameter of about {{Convert|71|cm}} and a height of about {{Convert|39|cm}}.  Pre-launch fueled masses were {{Convert|68|kg}}, and orbital masses were {{Convert|39|kg}} with a {{Convert|25|kg|adj=on}} [[Payload (air and space craft)|payload]]. They were capable of emitting signals on two [[transponders]] at just 2&nbsp;[[watt|W]]. Thus, Syncom satellites were only capable of carrying a single two-way telephone conversation, or 16 [[Teleprinter|Teletype]] connections. {{As of|2009|6|25|post=,}} all three satellites are still in orbit, although no longer functioning.<ref>{{cite web |title=U.S. Space Objects Registry |url=https://usspaceobjectsregistry.state.gov/Pages/Search.aspx |archive-url=https://web.archive.org/web/20131006073413/https://usspaceobjectsregistry.state.gov/Pages/Search.aspx |archive-date=October 6, 2013 }}</ref>