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- Galaxy_IV abstract "Galaxy IV was a model HS-601 satellite built by Hughes Space and Communications Company (HSC). The satellite, which carried a payload of both C band and Ku band transponders, was launched on June 24, 1993 and operated by PanAmSat Corporation.Control of Galaxy IV was lost on May 19, 1998 when the satellite's primary control processor failed. The backup control processor had suffered a previously undetected anomaly, and PanAmSat was not able to regain control of the spacecraft. Galaxy IV was declared a loss on May 20, 1998. Failure of the primary control processor was attributed to tin whisker growth, a phenomenon in which tendrils grow from solder, causing an electrical short circuit. Engineers believe that a hole developed in the conformal wax coating over the solder, allowing whiskers to develop. The satellite manufacturer, Hughes, has replaced pure tin plating with nickel to alleviate the problem in newer designs, adding 45 to 90 kg per payload.The loss of this satellite was very disruptive to telecommunications in the United States. Pagers were affected greatly; service was not restored for days. Wire news services, like Reuters, were also affected. The TV network CBS had to use alternate means of transmitting its programs, as did NPR.At the time of failure, Galaxy IV was in geostationary orbit at 99°W. This orbital slot was briefly occupied by Galaxy 4R, and is now occupied by the Galaxy VI satellite. Galaxy IV remains in space.".
- Galaxy_IV wikiPageExternalLink statement.html.
- Galaxy_IV wikiPageID "1410843".
- Galaxy_IV wikiPageLength "2289".
- Galaxy_IV wikiPageOutDegree "18".
- Galaxy_IV wikiPageRevisionID "636587528".
- Galaxy_IV wikiPageWikiLink Boeing_601.
- Galaxy_IV wikiPageWikiLink CBS.
- Galaxy_IV wikiPageWikiLink C_band.
- Galaxy_IV wikiPageWikiLink Category:Communications_satellites_in_geostationary_orbit.
- Galaxy_IV wikiPageWikiLink Communications_satellite.
- Galaxy_IV wikiPageWikiLink Galaxy_4R.
- Galaxy_IV wikiPageWikiLink Geostationary_orbit.
- Galaxy_IV wikiPageWikiLink Hughes_Aircraft_Company.
- Galaxy_IV wikiPageWikiLink Ku_band.
- Galaxy_IV wikiPageWikiLink NPR.
- Galaxy_IV wikiPageWikiLink Pager.
- Galaxy_IV wikiPageWikiLink PanAmSat.
- Galaxy_IV wikiPageWikiLink Reuters.
- Galaxy_IV wikiPageWikiLink Telecommunication.
- Galaxy_IV wikiPageWikiLink Television.
- Galaxy_IV wikiPageWikiLink Transponder.
- Galaxy_IV wikiPageWikiLink United_States.
- Galaxy_IV wikiPageWikiLink Whisker_(metallurgy).
- Galaxy_IV wikiPageWikiLinkText "Galaxy IV".
- Galaxy_IV wikiPageUsesTemplate Template:Communications-satellite-stub.
- Galaxy_IV wikiPageUsesTemplate Template:Distinguish.
- Galaxy_IV subject Category:Communications_satellites_in_geostationary_orbit.
- Galaxy_IV hypernym Satellite.
- Galaxy_IV type ArtificialSatellite.
- Galaxy_IV type Thing.
- Galaxy_IV comment "Galaxy IV was a model HS-601 satellite built by Hughes Space and Communications Company (HSC). The satellite, which carried a payload of both C band and Ku band transponders, was launched on June 24, 1993 and operated by PanAmSat Corporation.Control of Galaxy IV was lost on May 19, 1998 when the satellite's primary control processor failed. The backup control processor had suffered a previously undetected anomaly, and PanAmSat was not able to regain control of the spacecraft.".
- Galaxy_IV label "Galaxy IV".
- Galaxy_IV differentFrom Galaxy_4.
- Galaxy_IV differentFrom Samsung_Galaxy_S4.
- Galaxy_IV sameAs Q5518128.
- Galaxy_IV sameAs Galaxy_4.
- Galaxy_IV sameAs m.04_9wh.
- Galaxy_IV sameAs Q5518128.
- Galaxy_IV wasDerivedFrom Galaxy_IV?oldid=636587528.
- Galaxy_IV isPrimaryTopicOf Galaxy_IV.