Lockheed Martin Corporation

Bae Systems Information and Electronic Systems Integration Inc.

Alan M Rosenwinkel

Jonathan Mercurio

John B Stetson, Jr

Peter V Bedworth

Matthew J Sherman

Apurva N Mody

Jack Chuang

Aaron L Westman

Shawn P Fleming

Kenneth Carrigan

Alex Lackpour

David B Arnal

Dana L Day

Carl V Jannetti

Kellie Bucha

A spectrum sharing system includes an advanced beacon (e.g. a low latency RF link) as part of an information sharing subsystem. The advanced beacon signal carries radar spectrum transmission schedule in an obfuscated way such as not to reveal the geolocation of the radar. The information sharing subsystem directs nodes, such as cell phones, to share spectrum based on spectrum sharing instructions contained in the advanced beacon. The spectrum sharing system permits out-of-band sharing of spectrum white space, as well as sharing of in-band spectrum gray space.

Spectrum sharing system and method thereof

A fluid deionizer includes at least one graphene sheet perforated with apertures dimensioned to allow a flow of fluid and to disallow at least one particular type of ion contained in the flow of fluid. A purge valve is placed in an open position so as to collect the at least one particular type of ion disallowed by the graphene sheet so as to clean off the at least one graphene sheet. Another embodiment provides a deionizer with graphene sheets in cylindrical form. A separation apparatus is also provided in a cross-flow arrangement where a pressurized source directs a medium along a path substantially parallel to at least one sheet of graphene from an inlet to an outlet. The medium flows through the plural perforated apertures while a remaining portion of the medium and the disallowed components in the medium flow out the outlet.

Perforated graphene deionization or desalination

A system and method are disclosed for determining geoposition of an observer. The system includes a sensor such as a wide field of view camera or telescope that can capture an image of the sky. The image of the sky is used to compile a table or list of the stars in the sky along with their positions. This table or list is pattern-matched with a predetermined list or table of stars to identify each star. In one embodiment, the distances between all stars in the image are computed and compared to star images from an atmospheric refraction model. A comparison of the measured table or list and the refraction model, using an optimization algorithm, is performed to determine the geoposition of the observer. In an alternative embodiment, a sensor capable of measuring two different frequency bands obtains two images of each star in the sky simultaneously. A difference in displacement is determined between the two frequencies for each imaged star; and a magnitude and direction of the difference in displacement is used to determine the geoposition of a body.

Geoposition determination by starlight refraction measurement

A method for adapting the pointing of a radar system in response to distortion of a deckhouse support structure supporting plural antenna arrays of the radar system is provided. The method comprises the steps of making repeated measurements between at least one laser tracker located within the support structure and laser targets mounted within the support structure, and comparing the current measurements with previous measurements to determine physical bias introduced into the structure.

Dynamic relative internal alignment calibration

Data or electrooptic sensor (EOS) images are made of a star field and at least one, and possibly multiple, Earth satellites associated therewith. Calculations performed on the imaged locations of a satellite and two stars of a star field provide all the information needed to identify the observer's position. When the ephemerides of the satellite(s) are less accurately known, calculations performed on the imaged locations of at least two satellites and four stars of a star field provide all the information needed to identify the observer's position, because the along-track and cross-track ephemerides errors are different. Thus, the cross-track information of multiple satellites is preferentially used to determine the geolocation.

Geoposition determination using satellite ephemerides

A method for geoposition determination from a platform involves using star observations to determine the orientation of the platform relative to an Earth-Centered Earth-Fixed (ECEF) frame. Observations are also made from the platform of azimuth, elevation, and possibly range of an orbiting Earth satellite. Platform orientation in an inertial frame fixed in time (IFFIT) is determined, and the satellite azimuth and elevation are transformed to the IFFIT. The satellite orbital ellipse is determined. Vectors extending from the platform frame to the foci of the ellipse are defined and converted into ECEF. The vector extending to the gravitational center of the Earth is identified and defines the location of the platform.

Geoposition determination from star and satellite observations

A separation arrangement isolates chlorine, sodium and possibly other ions from water. The ion-laden water is applied to at least one graphene sheet perforated with apertures dimensioned to pass water molecules and to not pass the smallest relevant ion. The deionized water flowing through the perforated graphene sheet is collected. The ions which are not passed can be purged. In another embodiment, the ion-laden water is applied to a first graphene sheet perforated with apertures dimensioned to block chlorine ions and through a second graphene sheet perforated with apertures dimensioned to block sodium ions. The concentrated chlorine and sodium ions accumulating at the first and second perforated graphene sheets can be separately harvested.

Growing community of inventors

Haddonfield, NJ, United States of America

Alan M Rosenwinkel