MountainBear wrote:
As for the two minute intervals (in the doppler data) that looks superficially like data corruption. 30, 60, 90, 120 seconds are standard intervals for wait times if the connection is not satisfactory. E.,g. Try the connection, if it doesn't work, wait 120 seconds, try again.
Sounds logical, however how would/should/could the dopper shift be calculated if there was an incomplete or corrupted response from the a/c.
As I understand it these are very simple transmissions, as simple as:
Sat: "MH370?" (or other identifier)
A/C: "MH370"
Of the a/c response were corrupted, how could one tell that it was MH370 responding? If it were corrupted but identifiable as MH370, perhaps the doppler shift not be given the same weight as other uncorrupted responses.
I'm not suggesting that you are incorrect, rather just wondering about the validity of the shift data at 18:25 and 18:28 (if corrupt). If they were not included in the AAIB curve, it would certainly change the shape of that curves during the first couple of hours.