Methods and apparatus for providing target altitude...

Details Methods and apparatus for providing target altitude... Methods and apparatus for providing target altitude...

2006-10-30

2008-08-26

Tarcza, Thomas H. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Determining distance

Height finder

C342S041000, C342S140000

Reexamination Certificate

active

07417583

ABSTRACT:
Method and apparatus to track a contact using a sensor in a two-dimensional radar system, determine a closest point of approach (CPA) for the contact, determine a time to closest point of approach (TCPA) for the contact, and estimate an altitude for the contact from the closest point of approach (CPA) and a cross line of sight distance during the time to closest point of approach (TCPA).

REFERENCES:
patent: 2497913 (1950-02-01), Rines
patent: 3582626 (1971-06-01), Stansbury
patent: 4649390 (1987-03-01), Andrews et al.
patent: 4961075 (1990-10-01), Ward
patent: 6314366 (2001-11-01), Farmakis et al.
patent: 6690296 (2004-02-01), Corwin et al.
patent: 6776336 (2004-08-01), Bowen
patent: 2007/0216566 (2007-09-01), Wood
patent: 2007/0222665 (2007-09-01), Koeneman
The estimation of target motion parameters from cpa time measurements in a field of acoustic sensors F.M. Dommermuth J. Acoust. Soc. Am. 83 (4), Apr. 1988 p. 1476-1480.

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