公开(公告)号：US11294071B2

公开(公告)日：2022-04-05

申请号：US15777035

申请日：2016-11-18

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Sung Hyuck Im ,  Moon Beom Heo ,  Eun Sung Lee

IPC: G01S19/42 ,  G01S19/03 ,  H04W64/00 ,  G01S5/02 ,  G01S19/14 ,  G01S5/14 ,  G01S1/68 ,  G01S5/00 ,  B64C39/02

Abstract: An apparatus for determining a precise location including: a plurality of unmanned aerial vehicles each having a first broadband signal module and a global position system GPS receiver attached thereonto and flying in the air; and a terminal provided at a location and determining the location by communication with the first broadband signal modules. In addition, a method for determining a precise location including: respective GPS receivers receiving GPS signals from artificial satellites and detecting locations of each of the plurality of unmanned aerial vehicles, transmiting locations of the unmanned aerial vehicles and distances between the unmanned aerial vehicles and the terminal and determining a location of the terminal using information received from the first broadband signal modules.

公开(公告)号：US10649091B2

公开(公告)日：2020-05-12

申请号：US15819926

申请日：2017-11-21

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jae Ik Park ,  Eun Sung Lee ,  Moon Beom Heo ,  Gi Wook Nam

IPC: G01S19/07 ,  G01S19/02 ,  G01S19/27 ,  G01S19/05

Abstract: A Global Positioning System (GPS) receiver, a control method of the GPS receiver, and a GPS system are provided, which are capable of reducing an initial position check time using an SBAS signal transmitted from a SBAS satellite. The control method of a GPS receiver includes receiving an SBAS signal from a SBAS satellite and calculating a satellite clock and a satellite position of the GPS receiver using the received SBAS signal. The SBAS signal may contain a difference value between the ephemeris data and the almanac data of the GPS satellite. The difference value between the ephemeris data and the almanac data may include a satellite clock difference value and a satellite position difference value for the GPS satellite. Accordingly, it is possible to acquire the current position and time information more quickly and accurately, by shortening the initial position check time using the difference value between the ephemeris data and the almanac data included in the SBAS signal.

公开(公告)号：US10295674B2

公开(公告)日：2019-05-21

申请号：US15342431

申请日：2016-11-03

Applicant: Korea Aerospace Research Institute

Inventor： Young Sun Yun ,  Eun Sung Lee ,  Moon Beom Heo ,  Gi Wook Nam

IPC: G01S19/08 ,  G01S19/20

Abstract: Disclosed is a system for determining a protection level. The system includes a receiver configured to receive an error augmentation for a satellite orbit and clock error, an error augmentation for an ionospheric error, an error augmentation for noise and multi-path between a receiver and a satellite, and an error augmentation for a tropospheric error, a first calculator configured to calculate a first adjustment coefficient to be applied to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error, and a second calculator configured to calculate a protection level by applying the first adjustment coefficient.

公开(公告)号：US09221558B2

公开(公告)日：2015-12-29

申请号：US14092352

申请日：2013-11-27

Applicant: Korea Aerospace Research Institute

Inventor： Woon Ki Hong ,  Eun Sung Lee ,  Kwang Sik Choi ,  Moon Beom Heo ,  Gi Wook Nam

IPC: G06K9/00 ,  B64G1/10

CPC classification number: B64G1/10 ,  B64G3/00 ,  G01C11/02 ,  G01S19/00

Abstract: Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points.

Abstract translation: 卫星导航可视性计算装置。 卫星导航可视性计算装置包括：处理单元，被配置为二进制化输入的天视图以创建二进制图像;提取单元，被配置为从二值图像提取多个特征点;以及计算单元，被配置为计算卫星导航稀疏 使用多个特征点对应于天视图图像的精度（DOP）。

公开(公告)号：US20140185940A1

公开(公告)日：2014-07-03

申请号：US14092352

申请日：2013-11-27

Applicant: Korea Aerospace Research Institute

Inventor： Woon Ki Hong ,  Eun Sung Lee ,  Kwang Sik Choi ,  Moon Beom Heo ,  Gi Wook Nam

IPC: G06K9/00

CPC classification number: B64G1/10 ,  B64G3/00 ,  G01C11/02 ,  G01S19/00

Abstract: Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points.

Abstract translation: 卫星导航可视性计算装置。 卫星导航可视性计算装置包括：处理单元，被配置为二进制化输入的天视图以创建二进制图像;提取单元，被配置为从二值图像提取多个特征点;以及计算单元，被配置为计算卫星导航稀疏 使用多个特征点对应于天视图图像的精度（DOP）。