EP0607015B1
Expired / Lapsed
EP
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Method for tracking a maneuvering target with a slow scan rate sensor
Assignee: Lockheed Martin Corp
•
Filing: 1994-01-11
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Granted: 2000-09-27
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Expires: 2014-01-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin L. Post
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 11:56
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/72; G01S13/723
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A method for tracking a maneuvering target (X) with a slow scan
rate sensor, comprising: providing a maneuvering gate (10 to monitor a predetermined volume
disposed about a velocity vector of the target (X), the velocity vector having been
estimated from a historical track and extrapolation, wherein the volume is
bounded by inner and outer intersecting ellipsoids (12, 14); examining the volume for a potential detection when target correlation has
been distrubed; and correlating (118) the target (X) with the detection when the detection lies
within the volume, characterized in that: the inner ellipsoid (12) represents the loci of an object after proceeding in
the direction of the vector for a first predetermined time and then proceeding in a
turn having a first predetermined acceleration for a second predetermined time and the outer ellipsoid (14) represents the loci of the object after proceeding in
a turn having a second predetermined acceleration for a third predetermined time
and then proceeding in a straight path for a fourth predetermined time.
Claim 2
Dependent Claim
15 words
The method as in claim 1, wherein the volume is symmetrically
disposed about the vector.
Claim 3
Dependent Claim
16 words
The method as in claim 1 or 2, wherein the first time precedes the
second time.
Claim 4
Dependent Claim
36 words
The method as in claim 1, 2 or 3, wherein the first acceleration is
constant and has a value equal to the maximum acceleration that a predetermined
target (X) is expected to be able to achieve.
Claim 5
Independent Claim
33 words
The method as in any preceding claim, wherein the second
acceleration is constant and has a value equal to the maximum acceleration that a
predetermined target is expected to be able to achieve.
Claim 6
Independent Claim
26 words
The method as in any of any preceding claim, wherein the sum of
the first and second time is a scan interval of a tracking system.
Claim 7
Dependent Claim
23 words
The method as in claim 6, wherein the sum of the third and fourth
time is a scan interval of the tracking system.
Claim 8
Independent Claim
25 words
The method as in any preceding claim, wherein the volume is a
volume of revolution with the axis of revolution lying coincident with the vector.
Claim 9
Independent Claim
56 words
The method as in any preceding claim, wherein the step of
correlation includes: determining (114) if the detection is outside the inner ellipsoid; determining (116) if the detection is inside the outer ellipsoid; and declaring the detection to lie within the volume when the detection is both
outside the inner ellipsoid and inside the outer ellipsoid.
Claim 10
Dependent Claim
58 words
The method as in claim 9, wherein the first and second determining
steps include processing target information in a target coordinate system, wherein
at least some of the target information is obtained from the dot product of a target
direction cosine vector in a sensor coordinate system and a position error vector
(29) in the sensor coordinate system.
References Cited (Backward Citations)
No citation records indexed.
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