Worldvu Satellites Limited

Other

Daniel W Field

Alexander D Smith

Armen Askijian

James Grossman

Michael William Malone

Taylor Schmidt

Michael Thomas Conlin

Jean Hugues Wendling

Hugo Wendling

Michael T Conlin

Disclosed embodiments provide an integrated access control system. The integrated access control system includes both credential reader functionality and door controller functionality in the same package. In embodiments, the circuitry is miniaturized to fit within a standard 'single gang' box such as those used for a standard light switch or receptacle. In this way, the integrated access control system of disclosed embodiments installs easily and unobtrusively in standard sized openings. To operate in a confined area such as a single gang box enclosure, a variety of thermal management and power management techniques are employed to provide reliable operation.

Integrated access control system

A passive thermal system for use in aerospace vehicles includes a plurality of core-bearing radiator panels having at least one heat pipe embedded therein. The portion of the heat pipe embedded in each panel is fluidically coupled to the portions of the heat pipe in the other core-bearing radiator panels.

Fluidicially coupled heat pipes and method therefor

A passive thermal system for use in a satellite and other aerospace applications includes a container having a heat-pipe working fluid disposed in a first chamber and a Phase Change Material (PCM) disposed in a second chamber that substantially surrounds the first chamber. The first chamber contains a wick for transporting the heat-pipe working fluid. The exterior of the first chamber has fins, etc., that extend into the PCM for heat spreading and increased interface area.

Passive thermal system comprising combined heat pipe and phase change material and satellites incorporating same

A payload dispenser and a method for populating same with satellites is disclosed. The payload dispenser comprises a shell. A plurality of rail assemblies are each configured to receive plural satellites. The satellite laden rail assemblies are then coupled to the shell.

Payload dispensing system

Disclosed embodiments provide a configurable electronic credential reader. The electronic credential reader defaults to a first communication mode utilizing a unidirectional communication interface. A bidirectional communication interface is monitored. If data is detected on the bidirectional communication interface, the electronic credential reader switches to a bidirectional communication mode. Circuitry within the electronic credential reader switches between the unidirectional communication interface and bidirectional communication interface such that the same external communication lines are used for both the unidirectional mode and the bidirectional mode.

Electronic credential reader

A passive thermal system for use in satellites includes a solid radiator panel with a plurality of heat pipes attached to a surface thereof. In addition to their heat transporting capability, the heat pipes strengthen the radiator panel to which they are coupled. In some embodiments, the heat pipes are structurally modified to increase their area moment of inertia.

Satellite radiator panels with combined stiffener/heat pipe

Disclosed embodiments provide techniques for entry access synchronization. A lock interface module is installed at a premises and is in communication with one or more electronic locks. The lock interface module is in electronic communication with an access management system. Changes in access permissions made from the access management system are quickly propagated to the electronic locks by the lock interface module.

System and method for entry access control using radio frequency communication

A passive thermal system for use in aerospace vehicles includes a first passive thermal panel having at least one internal resident heat pipe, wherein the first passive thermal panel is further configured to provide an embedded interface between a portion of the resident heat pipe and at least one heat pipe extending from a neighboring passive thermal panel. The embedded interface is facilitated via an internal channel that is adjacent to the internal resident heat pipe. The channel is dimensioned and arranged to receive a portion of a heat pipe extending from a passive thermal panel that will be situated adjacent to the first passive thermal panel. The embedded interface is also facilitated by an arrangement that imparts a compressive force to the non-resident heat pipe that urges it against the resident heat pipe.

Passive thermal system providing an embedded interface for heat pipes

Embodiments of the present invention provide an improved access control unit with an asymmetric transmission pattern. A shielded backplate reduces the interior transmission pattern. The secure side transmission pattern is much smaller than the unsecure side transmission pattern, such that a credential located within the secure side area of a building is not likely to trigger the access control unit, thus reducing the risk of an unauthorized access.

Electronic access control device

A method for thermally stabilizing a communication satellite in orbit around the Earth relies on the discrete rotational symmetry of the pattern of antenna beams of the satellite. Exploiting the symmetry, the orientation of the satellite is changed from time to time by rotating the satellite through a symmetry angle of the rotational symmetry. Because of the symmetry, the beam pattern is unchanged after the rotation; but, because the rotation angle is less than 360&#xb0;, a different side of the satellite is exposed to sunlight. The use of different thermal radiators and thermal shields on different sides of the satellite means that the thermal budget of the satellite is different after the rotation. By judiciously applying rotations as needed, as the orbit's orientation relative to the Sun evolves in time, it is possible to achieve effective control on the thermal budget of the satellite.

Method for thermal stabilization of a communications satellite

A stackable satellite includes a satellite frame and at least one vertical pillar attached to the frame. The vertical pillar has an upper end and a lower end. The upper end is coupled to the lower end of the vertical pillar of the satellite above and the lower end is coupled to the upper end of the vertical pillar of the satellite below. The vertical pillar receives substantially all of the vertical load of the stackable satellite and any other satellites stacked above. Use of such vertical pillars removes the need for a dispenser or substantially lightens the dispenser mass to allow substantially more satellites to be carried in a payload.

Stackable satellites and method of stacking same

A satellite deployment system has a plurality of releasable dispenser modules that are attached to each other with each module carrying satellites. Each dispenser module acts as an individual final stage with its own propulsion unit and deploys a subset of satellites to the appropriate altitude and orbit. Since each dispenser module can deploy its satellites far from other dispenser modules, the risk of collision among the satellites is greatly reduced, which allows a large number of satellites to be launched in a safe, timely and cost-effective manner.

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Sunnyvale, CA, United States of America

Daniel W Field