US5359889A
Expired / Lapsed
US
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Vertical position aided inertial navigation system
Assignee: Lockheed Martin Corp
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Filing: 1993-03-05
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Granted: 1994-11-01
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Expires: 2013-03-05
Abstract
Abstract A vertical position and gravity map aided INS is self contained (no external signals required); covert (no signals emanated); unrestricted in operating area; able to operate in quiet or active gravity regions; and able to be configured with proven instruments.
Inventors
- 👤 Albert Jircitano
- 👤 Daniel E. Dosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:09
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/183; G01C21/185; G01C21/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A navigation system, comprising: a three axis inertial navigation system including an inertial vertical position data output port; a vertical position sensor including a sensed data output port; a gravity anomaly map means comprising a memory containing gravity anomalies data and an anomalies data output port; and an optimal filter including input ports connected to said anomalies data output port, said inertial vertical position data output port and said sensed data output port.
Claim 2
Dependent Claim
73 words
A navigation system, comprising: a three axis inertial navigation system including an inertial vertical position data output port; a vertical position sensor including a sensed data output port; a gravity anomaly map means comprising a memory containing gravity anomalies data and an anomalies data output port; and an optimal filter including input ports connected to said anomalies data output port, said inertial vertical position data output port and said sensed data output port.
References Cited (Backward Citations)
US3702477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |