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- Satellite_data_unit abstract "A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network. It is an integral part of an aircraft's SATCOM (satellite communication) system. The device connects with a satellite via ordinary radio frequency (RF) communication and the satellite then connects to a ground station or vice versa. All satellite communication whether audio or data is processed by the SDU.The SDU communicates with an onboard MDDU (multi-purpose disk-drive unit) which maintains an updatable table of ground stations in the aircraft's current area and the order of preference for selection of which ground station to use which thus guides the choice of satellite. Along with analysing data continuously sent from all ground stations (such as station status and the error rate of signals from each station) the SDU receives information on the aircraft's position and orientation from another onboard system (ADIRU, air data inertial reference unit) which it passes to the BSU (beam-steering unit) to direct the signal beam from the aircraft to the chosen satellite.With the advent of cellphones and the Internet a separate or integrated SDU can be used to offer telephone and Internet services to passengers.Logs of satellite communication have been used to inform search and rescue agencies of locations of missing aircraft, notably that of Malaysia Airlines Flight 370 whose position was unknown due to loss of radar contact and other communications. Automated SATCOM transmissions suggested it flew about 1600 km (1000 mi) off its designated flight path having flown approximately south-southwest rather than the intended approximately north-northeast.".
- Satellite_data_unit wikiPageID "43188546".
- Satellite_data_unit wikiPageLength "2658".
- Satellite_data_unit wikiPageOutDegree "11".
- Satellite_data_unit wikiPageRevisionID "696971682".
- Satellite_data_unit wikiPageWikiLink Air_data_inertial_reference_unit.
- Satellite_data_unit wikiPageWikiLink Avionics.
- Satellite_data_unit wikiPageWikiLink Category:Aircraft_instruments.
- Satellite_data_unit wikiPageWikiLink Category:Avionics.
- Satellite_data_unit wikiPageWikiLink Category:Navigational_equipment.
- Satellite_data_unit wikiPageWikiLink Malaysia_Airlines_Flight_370.
- Satellite_data_unit wikiPageWikiLink Points_of_the_compass.
- Satellite_data_unit wikiPageWikiLink Radar.
- Satellite_data_unit wikiPageWikiLink Radio_frequency.
- Satellite_data_unit wikiPageWikiLink Satellite.
- Satellite_data_unit wikiPageWikiLink Search_and_rescue.
- Satellite_data_unit wikiPageWikiLinkText "Satellite data unit".
- Satellite_data_unit wikiPageWikiLinkText "satellite data unit".
- Satellite_data_unit wikiPageUsesTemplate Template:Aviation-stub.
- Satellite_data_unit wikiPageUsesTemplate Template:Reflist.
- Satellite_data_unit wikiPageUsesTemplate Template:Satcomm.
- Satellite_data_unit wikiPageUsesTemplate Template:Technology-stub.
- Satellite_data_unit subject Category:Aircraft_instruments.
- Satellite_data_unit subject Category:Avionics.
- Satellite_data_unit subject Category:Navigational_equipment.
- Satellite_data_unit hypernym Device.
- Satellite_data_unit type Device.
- Satellite_data_unit comment "A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network. It is an integral part of an aircraft's SATCOM (satellite communication) system. The device connects with a satellite via ordinary radio frequency (RF) communication and the satellite then connects to a ground station or vice versa.".
- Satellite_data_unit label "Satellite data unit".
- Satellite_data_unit sameAs Q18355435.
- Satellite_data_unit sameAs m.0113cl38.
- Satellite_data_unit sameAs SDU.
- Satellite_data_unit sameAs Q18355435.
- Satellite_data_unit wasDerivedFrom Satellite_data_unit?oldid=696971682.
- Satellite_data_unit isPrimaryTopicOf Satellite_data_unit.