Navigational error correcting system
First Claim
1. A method for determining the position of a predetermined vehicle in a group of vehicles comprising the steps of:
- measuring the position of said vehicle from aboard said vehicle;
measuring the positions of all vehicles within said group from a predetermined reference position;
transmitting from said reference position the measured positions of all vehicles to said group simultaneously;
comparing in said predetermined vehicle all said measured positions with the position measured from said predetermined vehicle and deriving a comparison value;
selecting the position associated with said vehicle from the transmitted positions of all vehicles of said group in dependence on predetermined selection rules; and
applying a correction in the position of said predetermined vehicle dependent on said comparison value;
said correction being applied when said comparison value is within predetermined limits related to the accuracy of measuring the position of said vehicle from aboard said vehicle, said correction being not applied when said comparison value is ambiguous by being less than a predetermined limit of said accuracy.
0 Assignments
0 Petitions
Accused Products
Abstract
An arrangement for correcting errors incurred in airborne navigational systems. A ground installation in the form of a radar determines the positions of a multiple number of aircrafts, and communicates the positional information of the aircraft, simultaneously to all aircrafts involved. Each individual aircraft, thereupon, compares the position determined by its own navigational system, with the position communicated from the ground radar. On the basis of the resultant comparison, the navigator of each individual aircraft, is enabled to correct his position and compensate for the error inherent in the airborne navigational system.
34 Citations
22 Claims
-
1. A method for determining the position of a predetermined vehicle in a group of vehicles comprising the steps of:
- measuring the position of said vehicle from aboard said vehicle;
measuring the positions of all vehicles within said group from a predetermined reference position;
transmitting from said reference position the measured positions of all vehicles to said group simultaneously;
comparing in said predetermined vehicle all said measured positions with the position measured from said predetermined vehicle and deriving a comparison value;
selecting the position associated with said vehicle from the transmitted positions of all vehicles of said group in dependence on predetermined selection rules; and
applying a correction in the position of said predetermined vehicle dependent on said comparison value;
said correction being applied when said comparison value is within predetermined limits related to the accuracy of measuring the position of said vehicle from aboard said vehicle, said correction being not applied when said comparison value is ambiguous by being less than a predetermined limit of said accuracy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- measuring the position of said vehicle from aboard said vehicle;
-
11. An arrangement for determining the position of a predetermined vehicle in a group of vehicles, comprising, in combination, first measuring means in said vehicle for measuring the position of said vehicle from aboard said vehicle;
- second measuring means at a predetermined reference position for measuring the positions of all vehicles within said group from said predetermined reference position;
means for transmitting from said reference position the measured positions of all vehicles to said group simultaneously;
means in each of said vehicles for receiving the measured positions transmitted from said reference position;
comparison means in said vehicle for comparing all said measured positions transmitted from said reference position, with the position measured from said predetermined vehicle, the output of said comparison means comprising a comparison value;
means for selecting the position associated with said vehicle from the transmitted positions of all vehicles of said group in dependence on predetermined selection rules; and
correcting means for applying a correction in the position of said predetermined vehicle dependent on said comparison value;
said correction being applied when said comparison value is within predetermined limits related to the accuracy of measuring the position of said vehicle from aboard said vehicle, said correction being not applied when said comparison value is ambiguous by being less than a predetermined limit of said accuracy. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- second measuring means at a predetermined reference position for measuring the positions of all vehicles within said group from said predetermined reference position;
Specification