JOHN J MURPHY, DPM
Medical Practice at Ellicott Center Dr, Ellicott, MD

6502790, Jan 7, 2003

Nov 20, 2001

09/988781

John H. Murphy - Ellicott City MD

Northrop Grumman Corporation - Los Angeles CA

B64G 110

244158R, 244172

A non-uniform planar spaced constellation of satellites for providing continuous global or regional coverage including at least one pair of orbital planes having inclined co-rotating orbits, and at least one other orbital plane immediately adjacent one orbital plane of the pair of orbital planes having an inclined counter-rotating orbit, and wherein the fields of view of the satellites in the one pair of co-rotating orbital planes form an overlapped array of hexagonal packing at the equator, and the field of view of the satellites in the one other counter-rotating orbital plane and the one co-rotating orbital plane of the pair of co-rotating orbits form an overlapped array of rectangular packing at the equator, and wherein the spacing between the pair of co-rotating orbital planes is greater than the spacing between the one other counter-rotating orbital plane and the one co-rotating orbital plane.

7270299, Sep 18, 2007

Mar 23, 2005

11/086747

John H. Murphy - Ellicott City MD, US

Northrop Grumman Corporation - Los Angeles CA

B64G 1/10

2441584

A new approach for designing satellite constellations whereby each satellite follows a common ground track is being proposed for performing high-precision change detection imagery for long periods of time. By precisely prescribing the orbital parameters, i. e. , the relationship between the right ascension of the ascending nodes (RAAN) and the phase angle difference between successive satellites, for example, sharpened change detection images may be taken from successive satellites in the constellation without the need to process out blurring by any special image re-working software. The relationship between the orbital parameters of the satellites is precisely tuned to the earth's rotation rate for the altitude of the satellites. A reduction in the total satellite count is achievable due to tiling the satellite coverage in near optimal arrangements. Such high-precision change detection imaging by successive satellites in orbit around the earth is at least useful in the detection of underground facilities activities and the detection of slow moving objects.

7258305, Aug 21, 2007

Mar 23, 2005

11/086335

John H. Murphy - Ellicott City MD, US

Northrop Grumman Corporation - Los Angeles CA

B64G 1/10

2441584

A new approach for designing satellite constellations whereby the satellites are distributed into contiguous groups forming longitudinal lengths at least equal to 360 degrees. Gaps between the contiguous groups are uniformly distributed along the tracks. These contiguous groups of satellites may be populated by having multiple satellites onboard a single launch vehicle, whereby the satellites are nested into multiple common ground track sub-constellations to form a constellation with multiple common ground tracks.

4184768, Jan 22, 1980

Nov 4, 1977

5/848706

John C. Murphy - Ellicott City MD
Leonard C. Aamodt - Silver Spring MD

The Johns Hopkins University - Baltimore MD

G01J 342, G01J 156

356326

Pulsed light and readily measurable pulsed electrical energy are independently applied to a solid black, conductive sample in a gas-filled photoacoustic cell, each causing the black sample to heat. The heating of the black sample causes a pressure wave in the cell, which can be detected and measured. By adjusting the pulsed electrical energy, the pressure wave resulting from the pulsed electrical energy can be made to relate to the pressure wave resulting from the pulsed light in a predetermined manner. The pulsed light input intensity can then be measured in electrical units based on the measurable input of the electrical energy pulses. In this manner, the invention can be used as a radiometer. A second application for the present apparatus is in calibrating photoacoustic spectroscopy (PAS) cells. The PAS cell can be self-calibrated by discontinuing the light pulses and relating the pressure wave output to the electrical energy pulse input.

7255308, Aug 14, 2007

Mar 23, 2005

11/086754

John H. Murphy - Ellicott City MD, US

Northrop Grumman Corporation - Los Angeles CA

B64G 1/10

2441584

A new method of constellation design based on combining repeating ground tracks with common ground tracks and/or sun-synchronous orbits is used for performing high-precision change detection imagery for longer periods of time while minimizing battery usage. By precisely prescribing the orbital parameters, sharpened change detection images may be taken without the need to process out blurring by any special image re-working software. The relationship between the orbital parameters of the satellites is precisely tuned to the earth's rotation rate for the altitude of the satellites. The unique set of earth orbits minimizes satellite battery requirement while optimizing the ability to perform coherent change detection (CCD).