You’re way off in space on this.
There is no way that the sat can accurately determine a time differential in the plane’s vhf signal. What do you think would sync them? VHF is not even capable of high data accuracy because the frequency is too low for that.
You do not know what you are spewing. A telecom sat cannot determine an accurate range for a received signal by any means.
So are you saying that the Boeing engineers/Inmarsat are all lying???