US3573339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital electronic ground return simulator
Assignee: United States Department of the Navy
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Filing: 1969-07-24
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Granted: 1971-04-06
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Expires: 1989-07-24
Abstract
Abstract A radar simulator training device for training radar operators which utilizes the output of an antenna azimuth scan detector to select one of a plurality of stored programs of an azimuth sector of terrain. The selected program controls the gain of a variable gain amplifier in order to vary the ground return noise generator input to the amplifier. The output of the amplifier is then applied to the training display through various other circuitry.
Inventors
- 👤 Robert D Flower
- 👤 William A Hinkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:39
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/40; G01S7/4082
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
In a radar simulator training device, having a radar display, the improvement comprising means for simulating the effect of ground return on said display, said means comprising a plurality of stored programs each representing a respective azimuthal sector of terrain, means for storing said programs, means for selecting a particular program, and means for presenting a ground effect modified by said selected program on said radar display.
Claim 2
Dependent Claim
67 words
In a radar simulator training device, having a radar display, the improvement comprising means for simulating the effect of ground return on said display, said means comprising a plurality of stored programs each representing a respective azimuthal sector of terrain, means for storing said programs, means for selecting a particular program, and means for presenting a ground effect modified by said selected program on said radar display.
Claim 3
Dependent Claim
70 words
The apparatus of claim 1 wherein said means for selecting a particular program include a variable voltage generator means for developing a voltage to simulate scanning by a radar antenna, a reference voltage means, an azimuth section detector means, said azimuth section detector means being arranged to compare said variable voltage with said reference voltage to develop a selecting signal for selecting a particular program stored in said storing means.
Claim 4
Dependent Claim
37 words
The apparatus of claim 2 wherein said means for presenting a ground effect modified by said selected program include means for further modifying said ground effect in accordance with noise effects, altitude effects, and radar intensity effects.
Claim 5
Dependent Claim
99 words
The apparatus of claim 3 and including means for receiving an aircraft velocity signal from said radar simulator, means for receiving an antenna scan direction signal from said radar simulator, means for receiving an acquisition-track signal from said radar simulator, and means for combining said signals into a composite signal, means connecting said combining means to said storing means whereby said composite signal is applied to said storing means to enable said storing means to forward a signal to said means for presenting a ground effect, said forwarded signal representing a selected program as modified by said composite signal.
Claim 6
Dependent Claim
28 words
The apparatus of claim 4 wherein said combining means include a flight position counter for maintaining a record of aircraft position as modified by said aircraft velocity signal.
References Cited (Backward Citations)
US3294891A
Cited
US3435452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |