Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Apparatus and methods for inventory, sale, and delivery of digitally transferable goods
Communication apparatus, communication method, and communication system
Identifying multi-component carrier cells
Trash bag retention device
Controlling access to resources on a network
Self-assembling surface coating
Latch-up free ESD protection
  Randomly Featured Patents
Heterojunction bipolar transferred electron tetrode
Counterflow microbiological processes
Seedlings transplanting machine
Method and apparatus for performing non service affecting software upgrades in place
Process of preparing 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine
Plural-coil non-contact IC card having pot cores and shielding walls
Structure of multi-frequency antenna for a mobile phone
Method to provide low dielectric constant voids between adjacent conducting lines in a semiconductor device
Filter attachment machines
Method for manufacturing pigment, electrophotographic photoconductor using the pigment and electrophotographic image forming method and apparatus using the photoconductor