Inmarsat’s Doppler effect evidence ends hope for relatives of missing Malaysian jet passengers

by | Mar 26, 2014 | Satellites, Science, Seradata News, Technology | 0 comments

It has been lauded as a top scientific achievement but the sadness to relatives of the 239 passengers and crew of the missing Malaysian Airlines MH370 flight that resulted from their work will not be lost on engineers and scientists working at the mobile satellite communications firm Inmarsat.   For they have now conclusively proven that the missing Malaysian Boeing 777 jet airliner was almost certainly lost in the Southern Indian Ocean.  The Malaysian government has now formally accepted that this is so and has informed the relatives of those aboard the flight.

Inmarsat had originally revealed that it had been receiving and hourly “handshake” from carrier wave signal emitted by Malaysian Airlines MH370 flight via the Inmarsat 3F-1 satellite for hours after the aeroplane went missing.  The firm’s original analysis using the timing of the signals concluded that the aircraft was in a track that arched across the Indian Ocean, North West or South West of Malaysia.  By further analysing the Doppler effect’s shift of the L-band signal (Doppler shift is the apparent compression or expansion of the wavelength caused by transmissions from a moving object), and comparing it to the transmissions of other aircraft moving in the vicinity, researchers at the firm in conjunction with engineers at Boeing and experts at the UK Air Accident Investigations Branch, have found that the aircraft was heading on the southerly track and was at the limit of its fuel endurance as it transmitted its last signals west of Perth, Australia.

A more detailed explanation is at:

As a result of the international concern that a modern jet airliner could go untracked for weeks, moves are being made to have continually transmitting tracked positions of aircraft using the Iridium-satellite-tracked ADS-B system for remote and oceanic regions.


About Seradata

Seradata produce the renowned Seradata database. Trusted by over 100 of the world’s leading Space organisations, Seradata is a fully queryable database used for market analysis, failure/risk assessment, spectrum analysis and space situational awareness (SSA).

For more information go to

Related Articles




nasaspacexecoreviewsissesaArianespacevideochinaFalcon 9v1.2FT Block 525virgin galacticULAfalcon 9RoscosmosevaDGAspacewalkaviation weekaressoyuzIGTInternational Space StationRocket LabBeidouawardsBlue OriginspaceStarlinkSatellite broadcastingrussiamoonboeingAirbus DSISROCargo Return VehiclemarsblogresearchOneWebspaceshiptwojaxaorionmarsimpactdelayhyperbolaEutelsatdemocratrocketlunarhypertextobamagoogle lunar prizelaunchVegabarack obamaconstellationSEStourismnorthfiguresthales alenia spacespaceflightnode 2fundedIntelsatRaymond Lygo2009Lockheed MartinExpress MD-2Elon MuskAtlas Vromess2dassault aviationaviationLucy2008wk2sstlukradiomissilesuborbitaldocking portexplorationAriane 5 ECAVirgin OrbittestinternetLong March 2D/2sts-122Ariane 5Northrop GrummanSLSChina Manned Space EngineeringElectronflightspace tourism2010cotsnewspapermissile defensegalileospaceportExpress AMU 1Long March 4Cbuildspace stationaltairsoyuz 2-1aProton Minternational astronautical congressshuttlespace shuttleEuropean Space AgencyLauncherOneCosmosIntelsat 23scaled compositesnew yorkrulesAriane 6hanleybudgetatvVietnamshenzhoucongressMojaveboldenLong March 2COrbital ATKInmarsatcnesnew shepardiaclunar landerGuiana Space CenterkscApollolawsSpace Systems/LoralUK Space AgencyLong March 4BKuaizhou 1AILSprotonUS Air ForceTalulah RileydarpaElectron KSFalcon 9v1.2 Block 5Vega CeuAstriumSkylonpicturebaseusaastronautdragonlanderfiveeventTelesatNorth KoreaSSLAprilSNC50thinterviewLong MarchSea LaunchfalconWednesdaycustomerlinkatlantissuccessor