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On Aug 6, 1:56 am, wrote
Someone mentioned secondary surveillance. This is mode-s. It is also on 1030/1090Mhz. However, the reply from the transponder is more detailed. It contains a unique code for each aircraft. The older transponders simply return the squawk code that was assigned by ATC and entered by the pilot. Some mode-s can return airspace and location. http://mit.edu/6.933/www/Fall2000/mo...sb.tc.faa.gov/ Secondary radar is the term for any transponder mode radar--A, C or S. |
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