公开(公告)号：US20220308595A1

公开(公告)日：2022-09-29

申请号：US17524432

申请日：2021-11-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yoola HWANG ,  Jae Young AHN ,  Jihun CHA

IPC: G05D1/06 ,  G01W1/02 ,  G01S19/42 ,  B64C39/02

Abstract: Disclosed are a method and system for precise height positioning based on global navigation satellite system (GNSS). A precise height positioning method may include determining an orthometric height based on a barometric pressure and a temperature of a region where an unmanned aerial vehicle is located, determining a geoid height in accordance with GNSS positioning information of the unmanned aerial vehicle, and determining a final altitude based on a difference between an ellipsoidal height in accordance with the orthometric height and the geoid height and an ellipsoidal height included in the GNSS positioning information.

公开(公告)号：US20180155066A1

公开(公告)日：2018-06-07

申请号：US15495437

申请日：2017-04-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yoola HWANG ,  Byoung-Sun LEE

IPC: B64G1/24

CPC classification number: B64G1/242

Abstract: Provided is a satellite orbit controlling method and apparatus. A satellite orbit adjusting method performed at a current satellite may include measuring a distance between the current satellite and another satellite using a radio frequency; calculating a relative location relationship between the current satellite and the other satellite based on the measured distance, and estimating an orbit element based on the location relationship; calculating speed increment information for controlling a maneuver based on the estimated orbit element; and adjusting a satellite orbit of the current satellite based on the speed increment information.