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
Channel estimating method and device
Methods circuits apparatuses and systems for facilitating access to online content
Methods and devices for coding and decoding images, computer program implementing them and information carrier enabling their implementation
Mineral, nutritional, cosmetic, pharmaceutical, and agricultural compositions and methods for producing the same
Filler containing composition and process for production and use thereof
Efficient relay automatic repeat request procedure in broadband wireless access system
Anti-infective agents and uses thereof
  Randomly Featured Patents
Disposable pad
Liquid drainage system
Electrowetting battery having a nanostructured electrode surface
Closure lockdown assemblies and methods utilizing active materials
Outboard motor
Three-dimensional vision camera
Double-high memory system compatible with termination schemes for single-high memory systems
Repair process
Oligopetides with cyclic proline-analogous amino acids
Connection system for optical redundancy