Electronics and Telecommunications Research Institute

Jeom-Hun Lee

Jae-Hoon Kim

Ho-Jin Lee

Seong-Pal Lee

Jae-hoon Kim

Jong-Won Eun

In-One Joo

Sanguk Lee

Tae-Hee Kim

The present invention relates to an emergency position indicating radio beacon (EPIRB) terminal for confirming positions of ships and rescuing the ships during a marine disaster in a marine search and rescue system and an apparatus and a method for monitoring an operating state of the EPIRB terminal. The EPIRB terminal comprises: a sensor unit for sensing the sinking of a ship in which the EPIRB terminal is provided; a generation unit for generating a distress message corresponding to the sensed result of the sensor unit; and a transmission unit for broadcasting a distress signal including the distress message. The sensor unit comprises: a water-pressure sensor for outputting a water-pressure detection signal by sensing the water pressure in the inside of the ship; a moisture sensor for outputting a moisture detection signal by sensing the moisture inside the ship; and a separation sensor for outputting a separation detection signal by sensing the separation of the EPIRB terminal from the ship. The sensor unit outputs a generating request signal of the distress message to the generation unit by normally sensing the sinking of the ship when the water-pressure detection signal, the moisture detection signal, and the separation detection signal are outputted.

Emergency position indicating radio beacon terminal and apparatus and method for monitoring operating state thereof

Provided are an apparatus and method for determining a diameter of a reflector antenna. The apparatus includes a setting unit for setting up electrical characteristic values of the reflector antenna upon receipt thereof from outside, a parameter input unit for receiving a frequency, an antenna diameter variable value, antenna efficiency, Edge Taper (ET), and an Edge Of Coverage (EOC) angle as parameters for each of multiple frequencies to be accommodated in the reflector antenna, a graph generator for generating, on one rectangular coordinate, a graph representing the relationship between an antenna diameter and EOC directivity with respect to the EOC angle based on the parameters for each frequency received through the parameter input unit, an antenna diameter determination unit for determining an antenna diameter that simultaneously meets the preset EOC directivities for the frequencies to be accommodated in the reflector antenna by using the graph generated by the graph generation unit, and a graph output unit for mapping and outputting the graph generated by the graph generation unit on one rectangular coordinate with an antenna diameter axis and an EOC directivity axis to thereby represent the antenna diameter determined by the antenna diameter determination unit on the graph.

Apparatus for determining diameter of parabolic antenna and method therefor

Provided is a satellite ground control system and method based on a communication satellite. The system includes: a communication satellite link means for monitoring and controlling a system device and transmitting remote measurement data and a process result to the central control station; an interface for analyzing the command, transmitting the command to a processing means and transmitting remote measurement data and a process result to the communication satellite link means; a satellite operating means for receiving a command from the interface, transforming the command into a remote command and transmitting remote measurement data to the interface; and a control satellite link means for transmitting the received remote command, receiving the remote measurement data, transmitting the remote measurement data to the satellite operating means, and transmitting a process result of monitor and control of a corresponding system device to the interface.

Satellite ground control system using communication satellite

Provided is a Global Positioning System (GPS) signal repeater and a GPS receiver of a stationary orbit satellite, and a method for positioning a stationary orbit satellite using the same. The GPS signal repeater includes: a GPS receiver for receiving an L-band GPS signal transmitted from a GPS satellite; a low-noise amplifier for removing noise of the received L-band GPS signal and maximally amplifying a desired signal; a frequency transformer for transforming the amplified L-band GPS signal into an up-link frequency band; a high power amplifier for amplifying the transformed up-link frequency band GPS signal; and a transmitter for transmitting the amplified signal to a stationary orbit satellite.

GPS signal repeater and GPS receiver of stationary orbit satellite, and method for positioning stationary orbit satellite using the same

Provided is an antenna aligning apparatus for near-field measurement, which can perform alignment between a measurement target antenna and a probe antenna precisely by using an antenna pattern and detecting coordinates of the least error. The antenna aligning apparatus includes: a receiving antenna, a signal dividing means, a vertical polarization port, a horizontal polarization port, a first amplitude/phase detector, a second amplitude/phase detector, a coordinate determining means for, and a position adjuster.

Growing community of inventors

Daejon, South Korea

Jeom-Hun Lee