Electronics and Telecommunications Research Institute

Sejong University

Yoo La Hwang

Byoung Sun Lee

Jae Hoon Kim

Jae Young Ahn

Ji Hun Cha

Do Seob Ahn

Yong Jun Lee

Byung Woon Park

Soo Jeon Lee

Cheol Soon Lim

The present invention provides a method of performing a position measurement on the basis of a signal from a global navigation satellite system (GNSS). The method includes: receiving initial position information; estimating an initial value of a multipath error through a measurement of the GNSS signal on the basis of the received initial position information; estimating a multipath error from the initial value of the multipath error on the basis of a change in the measurement; removing the estimated multipath error from the measurement of the GNSS signal; and performing the position measurement on the basis of the GNSS measurement from which the multipath error is removed.

Method and apparatus for multipath mitigation in GNSS

Provided is an apparatus for monitoring a malfunctioning state of a global positioning system (GPS) satellite, the apparatus comprising: an orbit computing unit to compute an orbit of a geostationary satellite; a data receiver to receive GPS data from the GPS satellite; a data correction unit to correct an error in a clock error value of the GPS data; a first computing unit to compute a data pseudorange between the GPS satellite and a base station based on the corrected GPS data; a second computing unit to compute a geographical distance between the GPS satellite and the base station; and a determining unit to determine a malfunctioning state of the GPS satellite by comparing the data pseudorange and the geographical distance.

Apparatus and method for monitoring malfunctioning state of global positioning system (GPS) satellite

Disclosed are a space object disposal device and a space object disposal method using a rotation motion. The device for disposing a space object includes: a disposal orbit calculation unit configured to calculate a disposal orbit of a space object; an escape velocity calculation unit configured to calculate an escape velocity at which the space object moves along the disposal orbit; and a rotation driving unit configured to be connected the space object, rotate the space object on a predetermined rotation orbit so as to reach the escape velocity, and separate the space object at a point of contact of the predetermined rotation orbit and the disposal orbit when the space object rotates at the escape velocity.

Space object disposal device and space object disposal method

An apparatus and method for controlling a geostationary orbit satellite is provided. The method including generating remote measurement data by measuring a state of a geostationary orbit satellite, transmitting the remote measurement data, receiving a remote command signal, and controlling an orbit and a pose of the geostationary orbit satellite relative to inclined geosynchronous space debris.

Apparatus and method for controlling geostationary orbit satellite

An apparatus and method for determining an orbit of a geostationary satellite is provided. The orbit of the geostationary satellite may be determined using at least one pseudo-range of the geostationary satellite calculated based on an orbit and a position of at least one global positioning system (GPS) satellite, position information of the geostationary satellite, and an angle between the geostationary satellite and each GPS satellite.

Apparatus and method for determining orbit of geostationary satellite

Provided is a system for detecting an accident location, including: a navigation apparatus to extract identification information of a preinstalled apparatus, first distance information between the apparatus and at least one base station, and second distance information between the apparatus and a geostationary satellite, when an impact is applied to the apparatus; and an apparatus control center to compute location information of the navigation apparatus based on the identification information, the first distance information, and the second distance information, wherein the at least one base station receives the first distance information from the navigation apparatus and transmits the first distance information to the apparatus control center, and the geostationary satellite receives the second distance information from the navigation apparatus and transmits the second distance information to the apparatus control center.

System and method for detecting accident location

A flight dynamics subsystem (FDS), a velocity increment calculation module, and operational methods of the same are provided. A used fuel quantity actually used in a satellite is calculated, and a velocity increment is calculated using the calculated fuel quantity. Therefore, an orbit of the satellite may be estimated more accurately.

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Daejeon, South Korea

Yoo La Hwang