公开(公告)号：US20180356532A1

公开(公告)日：2018-12-13

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 ,  B64C39/02 ,  G01S19/03 ,  H04W64/00

CPC classification number: G01S19/42 ,  B64C39/02 ,  B64C39/024 ,  B64C2201/12 ,  G01S19/03 ,  H04W64/00

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：US20240369718A1

公开(公告)日：2024-11-07

申请号：US18689014

申请日：2022-10-12

Applicant: Korea Aerospace Research Institute

Inventor： Sung Hyuck IM ,  Kee Joo LEE ,  Jae Sung PARK

IPC: G01S19/25 ,  G01S19/22

Abstract: Disclosed are a positioning system and a positioning method using a low earth orbit satellite. The positioning system using a low earth orbit satellite according to the present invention comprises a generation unit for generating, when a communication period with a ground control station is reached, a first telemetry signal including a time value according to a reference time used by a low earth orbit satellite; a confirmation unit for confirming, on the basis of a navigation signal received from a navigation satellite, the GNSS time used as a reference by the navigation satellite; an adjustment unit for adjusting the time value in the first telemetry signal so as to be synchronized with the GNSS time; and a transmission unit for broadcast transmitting a second telemetry signal, after the adjustment, so that a positioning receiver on the ground can determine the position by using the second telemetry signal.

公开(公告)号：US20210075466A1

公开(公告)日：2021-03-11

申请号：US16627749

申请日：2018-08-13

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Sung Hyuck IM ,  Se Bum CHUN ,  Moon Beom HEO

IPC: H04B1/69 ,  H04B7/185

Abstract: The present invention relates to a device for operating a navigation satellite on the basis of a code division transmission array antenna and a method for operating a navigation satellite. The device for operating a navigation satellite on the basis of a code division transmission array antenna, according to the present invention, comprises: a code generation unit for allocating a spread spectrum code to each of a plurality of antennas; a determination unit for determining, as transmission-end antennas, at least some of the plurality of antennas, to which different spread spectrum codes are allocated; and a processing unit, which arranges each of the transmission-end antennas at predetermined coordinates such that a plurality of signals transmitted from the transmission-end antennas are transmitted to reception-end antennas through multiple paths.

公开(公告)号：US20250130091A1

公开(公告)日：2025-04-24

申请号：US18490627

申请日：2023-10-19

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Sung Hyuck IM ,  Kee Joo LEE ,  Jae Sung PARK

IPC: G01F23/284 ,  G01F23/80

Abstract: A method and apparatus for measuring a level for calculating a flow of a propellant tank are provided. The method of measuring a level for calculating a flow of a propellant tank includes, in response to an instruction to measure a level in a propellant tank storing a liquid fuel, generating propagated power for level measurement at a specified generation intensity inside the propellant tank through a transmission antenna, receiving the propagated power for level measurement passing through the liquid fuel through a reception antenna, calculating a degree of attenuation between the generation intensity and a reception intensity of the propagated power for level measurement, and measuring a height level of the liquid fuel by considering the degree of attenuation.

公开(公告)号：US20220332441A1

公开(公告)日：2022-10-20

申请号：US17555848

申请日：2021-12-20

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Sung Hyuck IM ,  Jun Seong LEE ,  Kee Joo LEE ,  Jae Sung PARK

IPC: B64G1/28 ,  B64G1/00 ,  B64G1/10 ,  B64G1/24

Abstract: An orbit transition apparatus that transitions an orbit of a payload in outer space includes a rotating body, an adapter disposed on a center part of the rotating body for docking a payload, a launch module disposed outside of the rotating body for launching the payload, and a thruster for rotating the rotating body. The launch module may launch the payload to a target orbit.

公开(公告)号：US20190011568A1

公开(公告)日：2019-01-10

申请号：US16065822

申请日：2016-12-21

Applicant: Korea Aerospace Research Institute

Inventor： Sung Hyuck IM ,  Moon Beom HEO ,  Eun Seong SON ,  Koon Tack KIM

IPC: G01S19/25 ,  G01S19/36

Abstract: Disclosed are a multiple satellite navigation signal combining device, and a signal processing device comprising same. The multiple satellite navigation signal combining device comprises: a plurality of reception antennas for receiving satellite navigation signals from a satellite; a time delay unit for setting one satellite navigation signal, among the satellite navigation signals received by means of the reception antennas, as a reference satellite navigation signal and time-delaying other satellite navigation signals excluding the reference satellite navigation signal; and a signal combining device for combining the reference satellite navigation signal and other satellite navigation signals that have been time-delayed and transmitting same to a global navigation satellite system receiver.

公开(公告)号：US20190011525A1

公开(公告)日：2019-01-10

申请号：US16065825

申请日：2016-12-21

Applicant: Korea Aerospace Research Institute

Inventor： Sung Hyuck IM ,  Moon Beom HEO ,  Se Bum CHUN ,  Deok Wo LIM ,  Eun Seong SON ,  Koon Tack KIM

IPC: G01S5/06 ,  G01S5/02 ,  G01S5/00

Abstract: Provided is a radio source position estimation system including a plurality of radio transmission devices spaced a predetermined distance apart from one another and configured to transmit radio frequency (RF) signals received from an arbitrary radio source and a central radio reception device configured to estimate a position of the radio source using the RF signals received from at least three radio transmission devices.