Method and system for locating radiant energy sources

• US 3,210,762 A
• Filed: 11/09/1961
• Issued: 10/05/1965
• Est. Priority Date: 11/09/1961
• Status: Expired due to Term

• Current Assignee: John M. Brabant
• Original Assignee: John M. Brabant
• Inventors: Brabant, John M.
• Application Number:
  US04/151,363
• Time in Patent Office: 1,426 Days
• US Class Current: 342/362
• CPC Class Codes: G01S 11/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 13/46 Indirect determination of position data
• CPC Class Codes: G01S 3/14 Systems for determining direction or deviation from predetermined direction aerial arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00; combinations of different interacting aerial units for giving a desired directional characteristic H01Q21/29; aerials or aerial systems providing at least two radiation patterns H01Q25/00
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Claims

1. IN A METHOD OF DETERMINING THE ELEVATION ANGLE OF A RADIATING TARGET CRAFT WITH RESPECT TO A RECEIVER, THE STEPS OF:

DETECTING A FIRST COMPONENT OF VERTICALLY POLARIZED ENERGY RADIATED FROM SAID TARGET CRAFT WHICH HAS BEEN REFLECTED OFF A HORIZONTAL REFLECTIVE SURFACE AT A GRAZING ANGLE;

DETECTING A SECOND COMPONENT OF VERTICALLY POLARIZED ENERGY RADIATED DIRECTLY FROM SAID TARGET CRAFT;

MEASURING THE RATIO OF THE MAGNITUDES OF SAID FIRST AND SECOND COMPONENTS OF SAID VERTICALLY POLARIZED ENERGY;

AND DETERMINING FROM SAID RATIO THE MAGNITUDE OF SAID GRAZING ANGLE.