The method and apparatus for observing unknown codes on the Satellite Positioning System satellites are disclosed. The technique employs the parabolic high gain antenna to determine the energy spectrum of the unknown W code. The technique does not provide sufficient accuracy to implement...http://www.google.fr/patents/US5708439?utm_source=gb-gplus-shareBrevet US5708439 - Method and apparatus for observing unknown codes on satellite positioning system
Method and apparatus for observing unknown codes on satellite positioning ...
