Eavesdropping: The Radio Signature of the Earth

Autor:	S. Brown, C. Wetherill, Woodruff T. Sullivan
Rok vydání:	1978
Předmět:	Physics Multidisciplinary Radio transmission Planet Extraterrestrial life Interstellar communication Detection theory Eavesdropping Computer security computer.software_genre Radar systems computer Remote sensing
Zdroj:	Science. 199:377-388
ISSN:	1095-9203 0036-8075
Popis:	In addition to searches for purposeful signals, those attempting interstellar communication should also consider the possibility of eavesdropping on radio emissions inadvertently "leaking" from other technical civilizations. To understand better the information which might be derivable from radio leakage, the case of planet earth is considered. The most detectable and useful escaping signal arise in a few BMEWS-type radar systems and in normal television broadcasting. A model including over 2000 television transmitters is used to demonstrate the wealth of astronomical and cultural information available from a distant observer9s careful monitoring of frequency and intensity variations in individual video carriers (program materials is not taken to be detectable).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06968d8ff1141f72094c2890a4c704e6 https://doi.org/10.1126/science.199.4327.377 Zobrazit plný text záznamu