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- Q17125780 subject Q8621223.
- Q17125780 abstract "Template:ForKopáč (the word means "digger" in Czech) was an early electronic warfare support measures (ESM) system developed in Czechoslovakia in the early 1960s that used measurements of time difference of arrival (TDOA) of pulses at three sites to accurately detect and track airborne emitters. The system used the principle of multilateration and was capable of simultaneously manually tracking up to six targets. It was first deployed in 1963 and was also known by its serial number, PRP-1. The initials PRP come from the Czech "Přesný radiotechnický pátrač", meaning "Accurate Radiotechnical Locator", the name comes from "Korelační pátrač", meaning "Correlation Locator".The concept was derived by Vlastimil Pech and patented in Czechoslovak classified patent 771 on November 13, 1961. Subsequent related patents 830, 852 and 859 were filed by Vladimír Zárybnický in 1962. The system used analogue signal processing and operated in D, G\H and I\J bands, as well as specifically against IFF and TACAN transponders at 1090 MHz.It remained in service with the Czechoslovak People's Army until 1979.".
- Q17125780 wikiPageWikiLink Q1063245.
- Q17125780 wikiPageWikiLink Q1327258.
- Q17125780 wikiPageWikiLink Q1332749.
- Q17125780 wikiPageWikiLink Q1361831.
- Q17125780 wikiPageWikiLink Q1640884.
- Q17125780 wikiPageWikiLink Q1779707.
- Q17125780 wikiPageWikiLink Q21716982.
- Q17125780 wikiPageWikiLink Q33946.
- Q17125780 wikiPageWikiLink Q3696227.
- Q17125780 wikiPageWikiLink Q389559.
- Q17125780 wikiPageWikiLink Q39369.
- Q17125780 wikiPageWikiLink Q5207110.
- Q17125780 wikiPageWikiLink Q5515158.
- Q17125780 wikiPageWikiLink Q5636321.
- Q17125780 wikiPageWikiLink Q7289941.
- Q17125780 wikiPageWikiLink Q836610.
- Q17125780 wikiPageWikiLink Q8621223.
- Q17125780 wikiPageWikiLink Q9056.
- Q17125780 comment "Template:ForKopáč (the word means "digger" in Czech) was an early electronic warfare support measures (ESM) system developed in Czechoslovakia in the early 1960s that used measurements of time difference of arrival (TDOA) of pulses at three sites to accurately detect and track airborne emitters. The system used the principle of multilateration and was capable of simultaneously manually tracking up to six targets. It was first deployed in 1963 and was also known by its serial number, PRP-1.".
- Q17125780 label "Kopáč passive sensor".