There are a couple of points:

1. Most people are not too interested in the altitude and speed of an aircraft - just where it is on the map

2. It should be possible even with incomplete data to see if the data that has been uploaded by a single station is credible - is the position reported reasonable for the aircraft (by make and model, flying at that altitude) compared to prior positions reported. A B752 at 5000ft is only likely to be within - say - 10km of the position it was in 10s ago type thing.

The maths would be a pain to work out but if doing Pythagoras and you're only interested the approximate magnitude of the answer - don't do the square root calculation (divide lots of compute) square the other side of the calculation instead (multiply is faster). or even easier just have a lookup table. Its a (B75,b73, a32, a33, a34, etc) 10s since last position - whats the square of the maximum distance it could have travelled ... is the position given within that range?

1. Most people are not too interested in the altitude and speed of an aircraft - just where it is on the map

2. It should be possible even with incomplete data to see if the data that has been uploaded by a single station is credible - is the position reported reasonable for the aircraft (by make and model, flying at that altitude) compared to prior positions reported. A B752 at 5000ft is only likely to be within - say - 10km of the position it was in 10s ago type thing.

The maths would be a pain to work out but if doing Pythagoras and you're only interested the approximate magnitude of the answer - don't do the square root calculation (divide lots of compute) square the other side of the calculation instead (multiply is faster). or even easier just have a lookup table. Its a (B75,b73, a32, a33, a34, etc) 10s since last position - whats the square of the maximum distance it could have travelled ... is the position given within that range?

## Comment