Resources Contact Us Home
Frequency hopping data link approach to autonomous GPS denied relative navigation determination

Image Number 2 for United States Patent #8010287.

The present invention is directed to accurate GPS (global positioning system)-free relative navigation between an unmanned aerial vehicle (UAV) and a tanker aircraft. The UAV transmits a signal which is received by an antenna array at the tanker aircraft. Horizontal relative position of the UAV is determined by calculating range and bearing based on time and phase differences in the received signal. Vertical relative position of the UAV is determined by comparing the altitude of the UAV with the altitude of the tanker aircraft. The tanker aircraft then transmits a navigation solution based on the relative position of the UAV which is received by the UAV. The UAV may utilize the navigation solution transmitted by the tanker aircraft as a backup to a GPS determined navigation solution, in a GPS denied scenario, or in combination with an INS (inertial navigation system) determined navigation solution.

  Recently Added Patents
Method and system for producing fluoride gas and fluorine-doped glass or ceramics
Lacrosse head
Methods and apparatus for adapting network characteristics in telecommunications systems
Cache memory control device, semiconductor integrated circuit, and cache memory control method
Signal processor and signal processing method
Managing imaging of computing devices
Organic light-emitting display and method of manufacturing the same
  Randomly Featured Patents
Poolside organizer
Method of locating an object-applied optical code
Anaerobic reactor with auger in the effluent line
Optical media protection methods and apparatuses
Pre-treatment of cellulosic fibres or cellulosic fibres in blends with synthetic fibres for subsequent transfer printing
Vinylacetylene-terminated polymide derivatives
Method of screening for drug hypersensitivity reaction
Rotor blade connecting arrangement for a turbomachine
Dyestuff mixtures of metal phthalocyanine and pyridone azo reactive dyes