Henry C Lee

US Patent:

43621066, Dec 7, 1982

Filed:

Apr 21, 1980

Appl. No.:

6/142548

Inventors:

Carl J. Campagnuolo - Potomac MD
Henry C. Lee - Annapolis MD

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F42C 1100

US Classification:

102207

Abstract:

An air deflector is provided for the air inlet means of a fuze ogive. The flector comprises a stationary deflecting surface which is configured so as to substantially reduce the amount of air entering the ogive during high velocity flight, while not substantially reducing the air inflow during relatively low velocity flight.

US Patent:

42989426, Nov 3, 1981

Filed:

Dec 19, 1979

Appl. No.:

6/105363

Inventors:

Henry E. Lee - Columbia MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G06F 1520
G06F 7552

US Classification:

364483

Abstract:

A nonlinear amplitude detector generates signal amplitude from the signal's inphase and quadrature components based on a Binomial series expansion. The amplitude detector significantly reduces the processing requirement from an ideal square root operation and yet provides much improved error performance over a conventionally used linear amplitude detector. In operation, the inphase and quadrature signal components are compared for relative magnitude and the smaller magnitude signal component is squared and divided by the large magnitude signal component. The quotient from this operation is multiplied by a coefficient that is selected to provide desired amplitude error deviation characteristics. Signal amplitude is then determined by summing this product with the larger magnitude signal component.

US Patent:

46268537, Dec 2, 1986

Filed:

Jul 20, 1984

Appl. No.:

6/632979

Inventors:

Henry E. Lee - Columbia MD
Michael B. Seldes - Rockville MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01S 728
G01S 1328

US Classification:

342132

Abstract:

A pulse compression signal processor suitable for use in a phase-coded, pulse compression radar for decoding the phase coded radar return pulses to enhance the resolvability of objects in range is disclosed. The pulse compression signal processor includes a conventional correlation processor operative in accordance with an initial filter function to convert a signal representative of the phase-code of the transmittal RF pulse to effect the range correlation response thereof. The resulting range correlation response is modified in accordance with a desired range correlation response. Both the phase code representative signal and the desired range correlation response signal are converted by fast Fourier transformations into their corresponding frequency domain signals which are divided to effect a desired filter function signal for use in decoding the phase-coded radar return pulses to effect substantially the desired range correlation response thereof. The pulse compression signal processor further includes an interative process to truncate the desired filter function signal in time in accordance with pre-established criteria.

US Patent:

45819998, Apr 15, 1986

Filed:

Apr 12, 1984

Appl. No.:

6/599379

Inventors:

Carl J. Campagnuolo - Potomac MD
Henry C. Lee - Menlo Park CA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F42C 2100

US Classification:

102293

Abstract:

Apparatus to simulate supersonic high altitude flight for air driven eleccal generators. First and second air-tight chambers are provided, as are means for evacuating the chambers to a preselected pressure. The air driven generator has both air inlet means and air outlet means. The air inlet means of the air driven generator is in fluid communication with the second air-tight chamber, and the air outlet means of the air driven generator is in fluid communication with the first air-tight chamber. Adjustable orifice means are provided. Valve controlled air inlet means for allowing air to enter the second air-tight chamber through the adjustable orifice means are also provided.

US Patent:

6201496, Mar 13, 2001

Filed:

Jan 12, 1981

Appl. No.:

6/224410

Inventors:

Henry E. Lee - Columbia MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01S 1372

US Classification:

342 90

Abstract:

A search radar including the improvement of apparatus for enhancing the estimation of the target angle within a search scan of the radar is disclosed. More specifically, the improvement apparatus utilizes the generated scan angles and target amplitude measurements correspondingly associated therewith to generate intermediate signals which are representative of the natural logarithm of the target amplitude measurements plus the square of the corresponding scan angle multiplied by a predetermined constant. For each search scan, the apparatus computes separately signals representative of the moments of: the scan angles, the squares of the scan angles, the products of the scan angles and corresponding intermediate signals, and the intermediate signals. In turn, the apparatus operates on the computed moment representative signals in some prespecified mathematical relationship to effect an optimum estimation for the target angle in each search scan of the radar. Simulated test results of the operation of the disclosed apparatus indicate an improvement over the simple centroid method of target angle estimation especially under the adverse conditions of a scintillating target with Rayleigh amplitude distribution.

US Patent:

42801273, Jul 21, 1981

Filed:

Jul 25, 1979

Appl. No.:

6/060514

Inventors:

Henry E. Lee - Columbia MD
Francisco J. Guillen - Ellicott City MD
R. Noel Longuemare - Ellicott City MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01S 1390

US Classification:

343 5CM

Abstract:

A synthetic aperture radar antenna, which is mechanically scanned through the squint mode, is operated to a selected roll angle to optimize the alignment of the antenna beam axis or isogain line, and the line of constant doppler frequency or isodop line. The roll angle is selected as a function of the angular position of the antenna in azimuth and elevation.