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公开(公告)号：US11155368B1
公开(公告)日：2021-10-26
申请号：US15920294
申请日：2018-03-13
Applicant: Space Systems/Loral, LLC
Inventor： Lenny Low , Jorge Delgado , Gordon Wu , Maria Eugenia Torres
Abstract: A spacecraft includes a propulsion subsystem including at least two electric thrusters, an electrical interface assembly that couples electrical conductors from the thrusters to a spacecraft harness, a pneumatic interface assembly that controls flow rate of propellant to the thrusters and a thruster support module (TSM) including a pointing arrangement and a mounting arrangement. A proximal portion of the mounting arrangement is coupled with a distal portion of the pointing arrangement; the at least two electric thrusters are disposed on a distal portion of the mounting arrangement; the electrical interface assembly and the pneumatic interface assembly are disposed on the proximal portion of the mounting arrangement. The mounting arrangement is configured to limit heat transfer between the thrusters and (b) one or more of the proximal portion of the mounting arrangement, the electrical interface assembly and the pneumatic interface assembly.
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公开(公告)号：US10594046B2
公开(公告)日：2020-03-17
申请号：US15172965
申请日：2016-06-03
Applicant: Space Systems/Loral, LLC
Inventor： William Hreha , Guillaume Lamontagne , Louis Trichardt Hildebrand
IPC: H04W4/00 , H01Q21/24 , H04W16/28 , H04B7/185 , H04W72/04 , H04W56/00 , H01Q3/26 , H04B7/0426 , H04W84/18 , H04B7/19
Abstract: A satellite communication system comprises one or more non-geostationary satellites. Each satellite is configured to provide a plurality of spot beams. The polarizations of the spot beams are laid out on each satellite so that terminals have a constant polarization as the field of regard traverses the terminal location.
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公开(公告)号：US20200028475A1
公开(公告)日：2020-01-23
申请号：US15628140
申请日：2017-06-20
Applicant: Space Systems/Loral, LLC
Inventor： Ghislain Turgeon , Anton Weaver-Madsen , Vijaya Gallagher , Richard Hoffmeister , Zheng Tu
Abstract: An amplifier system includes an input network having a plurality of input ports; an output network having a plurality of output ports; a plurality of amplification units coupled between the input network and the output network, the plurality of amplification units configured to amplify signals from the plurality of input ports; and a calibration unit coupled between the plurality of amplification units and the output network to calibrate amplified signals from the plurality of amplification units.
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公开(公告)号：US10536674B2
公开(公告)日：2020-01-14
申请号：US15900653
申请日：2018-02-20
Applicant: Space Systems/Loral, LLC
Inventor： Andrew E. Turner
Abstract: A low earth orbiting spacecraft (LEO spacecraft) operable in a first earth orbit includes a main body, a data collection payload, and a first directional antenna, each of the data collection payload and the first directional antenna being coupled with the main body. During a first period of time, the main body is oriented such that the data collection payload views a region of interest on the earth. During a second period of time, the main body and the first directional antenna are oriented such that the first directional antenna is directed toward a first ground station. During a third period of time, the main body and the first directional antenna are oriented such that the first directional antenna is directed toward a second spacecraft operating in a second orbit.
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公开(公告)号：US20190335464A1
公开(公告)日：2019-10-31
申请号：US16505937
申请日：2019-07-09
Applicant: Space Systems/Loral, LLC
Inventor： Kirby Chung
Abstract: A wireless communication system includes frequency reuse between terminals in common coverage regions using a multiple satellite architecture with spatial diversity. Different terminals may be associated with different ones of the satellites such that a common frequency can be reused by the different terminals. A gateway may communicate with a first satellite using a feeder beam having an overlapping geographic coverage region with a user beam used for communication between a set of user terminals and a second satellite. Spatial diversity is provided between the satellites, and the feeder beam and the user beam operate at common frequencies within the overlapping coverage region. In this manner, the bandwidth of both satellites at the common coverage region is used to increase the available capacity.
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Patent Agency Ranking
公开(公告)号：US10435182B1
公开(公告)日：2019-10-08
申请号：US15263209
申请日：2016-09-12
Applicant: Space Systems/Loral, LLC
Inventor： Varouj G. Baghdasarian
Abstract: Techniques for two-axis articulation of a deployed spacecraft solar array are disclosed. In one aspect, an arrangement mechanically coupling a solar array with a sidewall of a body of a spacecraft includes a proximal appendage, a distal appendage rotatably coupled with the proximal appendage by way of a hinge, and a closed cable loop (CCL) system coupled with the proximal appendage and the distal appendage. In an on-orbit configuration, a long axis of the proximal appendage defines an α axis that is substantially orthogonal to the sidewall. The hinge includes CCL disengagement mechanism configured to de-couple the CCL system from the proximal appendage and the distal appendage and a rotation driving mechanism configured to cause the distal appendage to rotate about a β axis when the proximal appendage is in the on-orbit configuration, the β axis being not aligned with the α axis.
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公开(公告)号：US10432308B1
公开(公告)日：2019-10-01
申请号：US16111008
申请日：2018-08-23
Applicant: Space Systems/Loral, LLC
Inventor： Ghislain Turgeon , Vijaya Gallagher
IPC: H04B10/118 , H04B7/185
Abstract: A system described herein includes a ground based gateway subsystem configured to transmit an RF feeder uplink beam to a satellite, and a space based subsystem of the satellite configured to receive the RF feeder uplink beam and produce in dependence thereon an optical ISL beam that is transmitted to another satellite. The ground based gateway subsystem can include a ground based beamformer used to produce the RF feeder uplink beam. The optical ISL beam, produced by the space based subsystem and transmitted to the other satellite, can comprise a wavelength division multiplexed optical signal having RF frequencies within a same specified RF frequency range within which the other satellite is configured to transmit a plurality of RF service downlink beams, thereby eliminating any need for the other satellite to perform any frequency conversions when producing the plurality of RF service downlink beams in dependence on the optical ISL beam.
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公开(公告)号：US10407189B1
公开(公告)日：2019-09-10
申请号：US15336541
申请日：2016-10-27
Applicant: Space Systems/Loral, LLC
Inventor： Michael Paul Freestone , Daniel Andrew Fluitt , Stephen Mark Schlocker
Abstract: A spacecraft includes a structural interface adapter for mating to a launch vehicle, at least one radiator panel, at least one interior equipment panel and a 3-D truss structure. The 3-D truss structure is mechanically coupled with the structural interface adapter, the at least one radiator panel, and the at least one interior equipment panel, and at least a portion of the 3-D truss structure is disposed between the radiator panel and the interior panel.
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9.发明申请公开(公告)号：US20190260340A1
公开(公告)日：2019-08-22
申请号：US16405162
申请日：2019-05-07
Applicant: Space Systems/Loral, LLC
Inventor： Farid Elwailly , James Knecht , David Grybos
Abstract: Beamforming channels of a satellite are calibrated using a low power, spread spectrum calibration signal. The power of the calibration signal is below the noise level of a user signal in an active channel, allowing channels to be calibrated while active. When calibrating the transmit side circuitry, a two-stage calibration can be used, first calibrating the output hybrid matrix, then calibrating the whole of the transmit side. To improve performance, the dwell time spend calibrating a channel can be based on the power of the user signal in the channel. A transmit probe can be used to inject a calibration signal into the receive antennae and a receive probe can be used to extract the calibration signal from the transmit antennae. To reduce frequency of calibrations, the calibrations can be based on path-to-path differences. These techniques are also applied to multiport amplifiers (MPAs).
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公开(公告)号：US10284308B1
公开(公告)日：2019-05-07
申请号：US15926628
申请日：2018-03-20
Applicant: Space Systems/Loral, LLC
Inventor： Farid Elwailly , David Grybos , James Knecht
Abstract: Disclosed herein is a system including analog receive paths and analog transmit paths and signal processing equipment onboard a satellite, and methods for use therewith. For each of a plurality of the analog receive paths, a calibration signal is injected therein below a noise floor thereof, while the path is actively used to receive and condition an RF signal, and the calibration signal is extracted from the analog receive path after the signal has traveled through at least a portion of the path. The extracted calibration signal is compared to the injected calibration signal to determine gain and phase deviations caused by the path. Gain and phase characteristics of the analog receive paths are adjusted to compensate for different gain and phase deviations being caused by different paths. Similar techniques are used to compensate for different gain and phase deviations being caused by different analog transmit paths.
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