公开(公告)号：US20210406490A1

公开(公告)日：2021-12-30

申请号：US17357706

申请日：2021-06-24

Applicant: SRI INTERNATIONAL

Inventor： Samson Phan ,  Leon Tao ,  William Hoskins ,  Scott Gulkin ,  Bryan Klofas ,  Todd Koumrian ,  Michael Cousins

IPC: G06K7/10

Abstract: Small, low-cost satellite systems, like CubeSats or other microsatellites, can exhibit reduced reliability relative to higher-cost satellite systems. This can result in difficulty identifying, communicating with, and tracking such satellite systems when they fail. Provided herein are reliable, low-cost, low-energy, turn-key systems for identification and tracking of small satellites that can be readily added to a microsatellite with minimal integration costs and while occupying a minimal amount of volume, mass, and external area of the host satellite. These systems are electrically isolated from the satellite bus, being powered by internal batteries or other separate energy sources and providing reliable identification and tracking even when the other systems of the satellite have failed. These improved identification and tracking systems include space environment sensors to maintain the system in a very-low-power state while the system is in vehicle processing and transit on Earth, extending device lifetime and reducing cost and weight.

公开(公告)号：US11763107B2

公开(公告)日：2023-09-19

申请号：US17357706

申请日：2021-06-24

Applicant: SRI INTERNATIONAL

Inventor： Samson Phan ,  Leon Tao ,  William Hoskins ,  Scott Gulkin ,  Bryan Klofas ,  Todd Koumrian ,  Michael Cousins

IPC: G06K7/10

CPC classification number: G06K7/10366

Abstract: Small, low-cost satellite systems, like CubeSats or other microsatellites, can exhibit reduced reliability relative to higher-cost satellite systems. This can result in difficulty identifying, communicating with, and tracking such satellite systems when they fail. Provided herein are reliable, low-cost, low-energy, turn-key systems for identification and tracking of small satellites that can be readily added to a microsatellite with minimal integration costs and while occupying a minimal amount of volume, mass, and external area of the host satellite. These systems are electrically isolated from the satellite bus, being powered by internal batteries or other separate energy sources and providing reliable identification and tracking even when the other systems of the satellite have failed. These improved identification and tracking systems include space environment sensors to maintain the system in a very-low-power state while the system is in vehicle processing and transit on Earth, extending device lifetime and reducing cost and weight.

公开(公告)号：US11539130B2

公开(公告)日：2022-12-27

申请号：US17169767

申请日：2021-02-08

Applicant: SRI INTERNATIONAL

Inventor： Michael J. Nicolls ,  Daniel P. Ceperley ,  Ryan C. Peterson ,  Bryan Klofas ,  David Watters ,  Thomas Durak ,  Michael Greffen ,  Moyra Malone ,  John J. Buonocore

IPC: H01Q19/17 ,  H01Q3/26 ,  H01Q25/00 ,  H01Q21/28 ,  H01Q5/45 ,  H01Q15/00 ,  H01Q3/04 ,  H01Q21/08 ,  H01Q21/22

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

公开(公告)号：US11024958B2

公开(公告)日：2021-06-01

申请号：US15561682

申请日：2016-04-08

Applicant: SRI INTERNATIONAL

Inventor： Michael J. Nicolls ,  Daniel P. Ceperley ,  Ryan C. Peterson ,  Bryan Klofas ,  David Watters ,  Thomas Durak ,  Michael Greffen ,  Moyra Malone ,  John J. Buonocore

IPC: H01Q3/26 ,  H01Q19/17 ,  H01Q25/00 ,  H01Q21/28 ,  H01Q5/45 ,  H01Q15/00 ,  H01Q3/04 ,  H01Q21/08 ,  H01Q21/22

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.