Hi Peter,
Have a look here http://www.yssyforum.net/board/showt...?t=8901&page=2 .
It was a Beechcraft King Air 350 VH-FIY performing Instrument Landing System (ILS) testing/calibration. Basically they do a series of around 15 approaches using the localiser and glidepath and technicians on the ground and in the aircraft monitor the results and make any subtle changes if needed. The tests are done from different angles both horizontally and vertically to ensure the ILS is transmitting correctly. It's a requirement that the ILS gets flight tested for accuracy every 6 months; ground based tests are done more frequently.
Today they will do the calibration of Rwy 25 ILS if the weather permits.
Cheers
__________________
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Last edited by Nigel C; 30th December 2012 at 07:59 AM.
Reason: updated info following a chat with the techs...
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