Reliable Global Navigation System using Flower Constellation

Aas 04-297 Uniformly Distributed Flower Constellation Design Study for Global Navigation System

The recently developed Flower Constellations have the satellites following the same relative trajectory with respect to an Earth rotating reference frame. This allows you to design an approximate uniform relative trajectory over the region of interest (which can be global) and uniformly distribute in time the satellites along the relative trajectory. Based on this idea, a new constellation of 3...

Kinematic Precise Point Positioning Using Multi-Constellation Global Navigation Satellite System (GNSS) Observations

Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available. This paper discusses the performance of multi-constellation kinematic PPP based on a multi-constellation kinematic PPP model, Kalman filter and ...

A Highly Reliable Navigation System for. . .

The determination of the current absolute position and orientation of a mobile robot provides the basis for any navigation purposes. The system proposed in this article uses colored floor tiles that contain inscribed and adequately coded information for localization purposes. The position information can be detected with sufficient accuracy and reliability in real-time so that an autonomous veh...

Real-Time Navigation Using the Global Positioning System

For more than a decade, TRW has been involved in aerospace applications of the Global Positioning System (GPS). TRW Ballistic Missiles Division first began working with GPS on a Minuteman missile test flight program in 1980. Since then, TRW has applied GPS to programs such as the Peacekeeper missile, the F-22 fighter aircraft, the Orbital Maneuvering Vehicle, Brilliant Pebbles, and classified s...

Autonomous Navigation of Indoor Mobile Robot Using Global Ultrasonic System