direction-finding technique
41Superheterodyne receiver — A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… …
42List of World War II electronic warfare equipment — This is a List of World War II electronic warfare equipment and code words and tactics derived directly from the use of electronic equipment.Equipment and code words*AI (Airborne Interception) British night fighter radars *Airborne Cigar (A.B.C.) …
43Huff-Duff — du croiseur HMS Belfast Huff Duff est le surnom donné à l abréviation, HF/DF ( High Frequency/Direction Finding ) et concerne un système de radiogoniométrie, dispositif de repérage utilisé pendant et après la Seconde guerre mondiale. Cet appareil …
44Surveillance — For other uses, see Surveillance (disambiguation). A nest of surveillance cameras at the Gillette Stadium in Foxborough, Massachusetts Surveillance ( …
45United States Naval Research Laboratory — Naval Research Laboratory Emblem of the NRL Active 1923 present Country …
46Henri G. Busignies — Infobox Scientist name = Henri G. Busignies caption = birth date = birth place = death date = death place = residence = citizenship = nationality = ethnicity = fields = workplaces = alma mater = doctoral advisor = academic advisors = doctoral… …
47Earth's magnetic field — Computer simulation of the Earth s field in a normal period between reversals.[1] The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and… …
48Phase-Comparison Monopulse — Phase interferometry describes a technique that can be used in radar and direction finding applications to accurately estimate the direction of arrival of a signal from the phase difference of the signal measured on two (or more) separated… …
49Cryptography — Secret code redirects here. For the Aya Kamiki album, see Secret Code. Symmetric key cryptography, where the same key is used both for encryption and decryption …
50Go (game) — This article is about Go, the board game. For other uses, see Go (disambiguation). Goe redirects here. For other uses, see GOE (disambiguation). Go Go is played on a grid of black lines (usually 19×19). The playing pieces, called stones, are… …
