Worldvu Satellites Limited

Lockheed Martin Corporation

Melvin S Ni

James Wes Irwin

Joseph C Marron

Gregory Thane Wyler

Gregory Samuel Feller

James E Mason

Joe Marron

A system and a method for estimating the elevation angle of one or more objects surrounding a user terminal include a camera device for capturing an image of the sky and a display device for displaying the image of the sky captured by the camera device. One of the camera device and the display device generates an elevation limit marking in the image of the sky displayed by the display device. The elevation limit marking in the image of the sky defines an elevation angle above a horizon of the earth that all the one or more objects in a field of view of the camera device must remain below so that the user terminal has an unobstructed view of the sky in all azimuthal directions.

Elevation angle estimating system and method for user terminal placement

A device and method for tracking satellites and handing off from one satellite to another includes a linear phased array antenna capable of generating and receiving a radio signal beam and electronically pointing the beam, a first motor for tilting the antenna to mechanically point a radio signal beam generated with the antenna, a second motor for spinning or rotating the antenna to mechanically point the beam, and a controller for controlling the electronic and the mechanical pointing of the beam. The directions of the electronic and mechanical pointing of the beam is performed by selecting a certain angular profile for the second motor from the start point to the end point of the path and calculating a path of a satellite to be tracked from a start point to an end point.

User terminal having a linear array antenna with electronic and mechanical actuation system

A system and method for maintaining signal-to-noise ratio when a user terminal switches beams includes a user terminal that generates beam-pointing information. The beam-pointing information is used either to alter the time at which the user terminal switches communications from a first beam to a second beam transmitted from a satellite or to adjust the attitude of the satellite, thereby correcting any error in pointing angle of the beams transmitted from the satellite to the user terminal.

Method for maintaining signal-to-noise ratio at a user terminal in a satellite system

A device and method for estimating the elevation angle of one or more objects surrounding a user terminal, include a light-collecting lens arrangement that collects sky scene light from a wide angle, an eyepiece lens arrangement that collimates the sky scene light collected by the light-collecting lens arrangement, and an elevation limit marking that is superimposed over the sky scene light. The elevation limit marking defines an elevation angle above a horizon of the earth that all the one or more objects in a field of view of the device must remain below so that the user terminal has an unobstructed view of the sky in all azimuthal directions.

Elevation angle estimating device and method for user terminal placement

A device and method for estimating the elevation angle of one or more objects surrounding a user terminal include a convex image-reflecting surface, a transparent sighting surface disposed above the convex image-reflecting surface, and an elevation limit marking formed on or in the sighting surface. The elevation limit marking generates a reflected image in the convex image-reflecting surface that defines an elevation angle above a horizon of the earth that the one or more objects in a field of view of the convex image-reflecting surface must remain below so that the user terminal has an unobstructed view of the sky in all azimuthal directions.

An imaging system having a first laser emitting a light beam to illuminate the object is provided. The system includes first and second beam splitters. The first beam splitter combines a first light beam portion and a third light beam portion emitted from a second laser to form a first interference pattern. The second beam splitter combines a second light beam portion and a fourth light beam portion to form a second interference pattern. The system includes digital cameras generating raw image data based on the first and second interference patterns, and a computer processing the raw image data to obtain synthetic image plane data.

Imaging systems and methods for generating image data

A system and method of calibrating an optical measurement system utilizing polarization diversity is disclosed. A waveplate having a rotation axis is provided. A first light polarization component and a second light polarization component are caused to propagate in the waveplate while the waveplate is rotated about the rotation axis. An equal common phase shift is caused in the first and second light polarization components while a differential phase shift in the first and second light polarization components is maintained. A relative phase between the first and second light polarization components is sensed. At least one calibration parameter is determined based on the relative phase.

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Cupertino, CA, United States of America

Melvin S Ni