[time-nuts] MH370 Doppler

[Joe Leikhim]

Is anyone paying attention to all the chatter about the lost aircraft 
MH370, Inmarsat's supposed flight tracks based on 6 or 7 pings (1 per 
hour), the Doppler shift (BFO) and transaction timing (BTO) etc??

Basically from my perspective they are putting too much stock into the 
Doppler which relies in part upon the stability of the satellite 
terminal in the 777 aircraft. My question is how stable an oscillator 
(reported OCXO - not confirmed)  would be under the extremes of either 
or both a cabin fire or decompression event. There is a website (Duncan 
Steel Blog) where some math brains are trying to sort out the raw data 
provided by Inmarsat. They have made assumptions about the stability of 
the local oscillator in the satellite, but I think the aircraft 
satellite terminal's master oscillator is a variable they have pushed 
aside.

-- 
Joe Leikhim


Leikhim and Associates

Communications Consultants

Oviedo, Florida

JLeikhim at Leikhim.com

407-982-0446

WWW.LEIKHIM.COM