Title :
Emergency Locator Transmitter (ELT) signal models for SARSAT
Author :
Carter, C.R. ; Casas, Efren David Gutierrez ; Chung, Taeyoung
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
fDate :
4/1/1986 12:00:00 AM
Abstract :
Three different models for emergency locator transmitter (ELT) signals are proposed. The first model, the ideal coherent model ELT, produces a highly idealized spectrum which does not exist in practice. The second model, the nonideal coherent model ELT, is capable of producing a wide range of spectra which can be closely related to actual ELT signals. Mathematical analysis identifies a design problem not previously recognized and provides the basis for a new design specification which should become mandatory. The third model, the noncoherent model ELT, represents a class of ELT signals having very poor spectral properties. This type of ELT design should be avoided.
Keywords :
radar theory; satellite relay systems; tracking; ELT; SARSAT; design specification; emergency locator transmitter; ideal coherent model; noncoherent model; nonideal coherent model; signal models; spectral properties; Computational modeling; Frequency modulation; Mathematical model; Oscillators; Satellites; Switches;
Journal_Title :
Electrical Engineering Journal, Canadian
DOI :
10.1109/CEEJ.1986.6593743