QDR definitions

QDR

magnetic bearing from the station.
Found on http://airodyssey.net/reference/glossary/

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QDR

Quad Data Rate
Found on http://www.translationdirectory.com/glossaries/glossary117.htm

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QDR

Quality, Durability, Reliability
Found on http://www3.sympatico.ca/dhaughey/j1930.htm

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