Flight Data Recorders

What will all these new filter technologies, you still need to sump your
fuel. Too much water, even though the filter will catch it, will still
plug it up.


RT wrote:
"Paul Saccani" wrote in message
...
Aren't both sources integrated via a fast Kalman filter? GPS errors
are rapid and errors tend to clump around an accurate position, whilst
INS errors are slow and tend to drift away from an accurate position.
Integrating the systems via a Kalman filter results in a far more
accurate and precise position.

Be interested in the technicalities, having been obliged to use a 4th order
Chebishev (sp?) filter for some DA years ago - got a URL ? (Too lazy to
look atm :-)