Originally Posted by
Shadoko
- is it known how the BTO data published ("raw data" PDF) were measured? It is evident that the digits are not the whole go and back signal time.
It's clarified in the latest ATSB document. The BTO is the time between the time the transmission from the aircraft is received and the start of the timeslot when it should have been received. The aircraft calculates that timeslot by using the signal from the satellite as a reference. At the 'nominal location', the two should be perfectly synchronized.
See page 23 of:
http://www.atsb.gov.au/media/4911984...370-report.pdf