公开(公告)号：US09813151B2

公开(公告)日：2017-11-07

申请号：US14817985

申请日：2015-08-04

申请人： Ryan Wallace Kingsbury ,  Kathleen Michelle Riesing ,  Kerri Lynn Cahoy ,  Tam Nguyen Thuc Nguyen ,  David O. Caplan

发明人： Ryan Wallace Kingsbury ,  Kathleen Michelle Riesing ,  Kerri Lynn Cahoy ,  Tam Nguyen Thuc Nguyen ,  David O. Caplan

IPC分类号： H04B10/00 ,  H04B10/118

CPC分类号： H04B10/118

摘要： Communication bottlenecks, particularly in the downlink direction, are a common problem for many CubeSat developers. As described herein, a CubeSat module for a CubeSat comprises an optical transmitter to transmit data to a remote terminal, a receiver to acquire an optical beacon from a remote terminal, and a fine-pointing module operably and directly coupleable to a coarse-pointing module of the CubeSat. The fine-pointing module is configured to point the optical transmitter toward the remote terminal with an accuracy range that overlaps with an accuracy range of the coarse-pointing module of the CubeSat so as to establish a communications link between the CubeSat and the remote terminal over a low-Earth-orbit (LEO) distance.

公开(公告)号：US20150298827A1

公开(公告)日：2015-10-22

申请号：US14644425

申请日：2015-03-11

申请人： Tam Nguyen Thuc Nguyen ,  Kerri L. Cahoy ,  Meghan K. Quadrino

发明人： Tam Nguyen Thuc Nguyen ,  Kerri L. Cahoy ,  Meghan K. Quadrino

IPC分类号： B64G1/36

CPC分类号： B64G1/365 ,  B64G1/26 ,  B64G1/281 ,  B64G1/283 ,  B64G1/285 ,  B64G1/286 ,  B64G1/288 ,  B64G1/32 ,  B64G1/34 ,  B64G1/36 ,  B64G1/363 ,  B64G1/366 ,  B64G1/407 ,  B64G2001/245

摘要： Described herein are systems and methods for attitude determination using infrared Earth horizon sensors (EHSs) with Gaussian response characteristics. Attitude information is acquired by detecting Earth's infrared electromagnetic radiation and, subsequently, determining the region obscured by Earth in the sensors' fields of view to compute a nadir vector estimation in the spacecraft's body frame. The method can be applied when two sensors, each with known and distinct pointing directions, detect the horizon, which is defined as having their fields of view partially obscured by Earth. The method can be implemented compactly to provide high-accuracy attitude within small spacecraft, such as CubeSat-based satellites.

摘要翻译： 这里描述了使用具有高斯响应特性的红外地球水平传感器（EHS）的姿态确定的系统和方法。 通过检测地球的红外线电磁辐射获得态度信息，随后确定传感器视野中被地球遮蔽的区域，以计算航天器身体框架中的最低底矢量估计。 当具有已知和不同指向的两个传感器检测到地平线时，该方法可以被应用，其被定义为它们的视野部分被地球遮蔽。 该方法可以紧凑地实现，以在小型航天器内提供高精度的姿态，例如基于CubeSat的卫星。