So this is the updated chart , a bit less cluttered , showing the original BFO curve in blue , and with it a brown line illustrating how the values can change when the satellite motion is removed ......
...on the first part of the chart the values are increased , and after 19:40UTC , the opposite effect , reducing the values to bring the BFO required to a much flatter curve .....
We need two data points to get the correct match...the satellite motion should be part of a sine curve although it looks like a fairly straight line in the previous chart . One obvious data point is at the satellite apogee , close to 19:40UTC ......ie , no vertical satellite motion , so the value depicted on the chart is all down to the aircraft motion........
..the second reference point I used is at 16:30UTC , thought to be when the aircraft was stationary from the cockpit transcript .............but if they were already taxying then it is possible that the satellite contribution was higher.........meaning the first part of the chart should be in turn higher values , and the second part even flatter.......
