PPRuNe Forums - View Single Post - Malaysian Airlines MH370 contact lost
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Old 24th Mar 2014, 15:03
  #7793 (permalink)  
VinRouge
 
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http://www.pprune.org/8380536-post4502.html

Posted that Doppler could solve the rough track of the aircraft back on the 16th. Looks as if thats how they managed to go firm on the southern route.

Unless they have a truly tremendous receiver on the satellite, Doppler is only by a Hz or so, and would still not split North and South. The only way for Inmarsat to decide between tracks is on the possible routes highlighted by the series of eight pings.
Indicated doppler effect pops up on our FMS, typically depending on sat geometry, you are looking at between 10 and 50 Hz difference, so not insignificant I believe. With multiple sats and a few complex equations, you can get a rough derived relative track and velocity which it loos as if Inmarsat have done in this case.

Whether any other agencies have been involved in locating potential wreckage is irrelevant. All that matters is the families can get closure and a rough search area is established to determine what why and possibly who was responsible.
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