Patent
Gyro-aided pointing control for laser communications
Ketao Liu,Qinghong W. Wang +1 more
TLDR
In this paper, a method for pointing control of a laser communication terminal on a spacecraft may include measuring a line-of-sight (LOS) error of the laser communication terminals.Abstract:
A method for pointing control of a laser communication terminal on a spacecraft may include measuring a line-of-sight (LOS) error of the laser communication terminal. The method may also include estimating a LOS error of the laser communication terminal based on measurements from a spacecraft gyro and a gimbal gyro onboard the spacecraft. The method may further include switching from a LOS error measurement feedback to a LOS error estimate feedback to control pointing of the laser communication terminal during a power fade condition.read more
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Patent
System for bidirectional free-space laser communication of gigabit ethernet telemetry data
TL;DR: In this paper, a free-space laser communication system for bidirectional transmission of telemetry data in Gigabit Ethernet (GBE) protocol using a dual atmospheric effect mitigation approach is presented.
References
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Patent
Method and device for obtaining attitude under interference by a GSP receiver equipped with an array antenna
TL;DR: In this article, a GPS receiver that determines its own attitude under jamming conditions is created by augmenting it with an array antenna and a novel signal processing system, which comprises a cascaded parallel architecture inserted between the array antennas and the GPS receiver.
Patent
Free-space laser communication system having six axes of movement
TL;DR: In this paper, a fine tracking and acquisition system consisting of a low inertia steering mirror having two axes of movement is proposed to point the communication laser transmission optical apertures separately from the beacon laser, a coarse tracker and a communication receiver.
Patent
Acquisition, pointing, and tracking architecture for laser communication
TL;DR: In this article, a technique for acquiring and tracking terminals in a free-space laser communication system involves exchanging beacon laser beams between the terminals to acquire and then track the terminals such that data laser beams exchanged by the terminals for communication are steered based on feedback from detection of the beacon laser beam.
Patent
Laser range finder closed-loop pointing technology of relative navigation, attitude determination, pointing and tracking for spacecraft rendezvous
TL;DR: In this article, a closed-loop LRF pointing technology to measure the range of a target satellite from a chaser satellite for rendezvous is provided that includes: LOS angle measurements of the target, a relative navigation Kalman filter, attitude determination of the visible sensor with gyros, star trackers and a KF, pointing and rate commands for tracking the target.
Patent
Attitude determination and alignment using electro-optical sensors and global navigation satellites
Yasuhiro Kinashi,David Salazar +1 more
TL;DR: In this article, an attitude determination and alignment method and system use electro-optical sensors and global navigation satellites to determine attitude knowledge for a spacecraft, satellite, or a high-altitude aircraft.