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Categories: Disambiguation Severe acute respiratory syndrome (SARS) was an atypical pneumonia that first appeared in November 2002 in Guangdong Province, in the city of Foshan, of the Peoples Republic of China. ... Michael Sars (b. ... Georg Ossian Sars (April 20, 1837 - April 9, 1927) was a Norwegian marine biologist. ... A Special Administrative Region (SAR) (Simplified Chinese: 特别行政区; Traditional Chinese: 特別行政區; pinyin: tèbié xíngzhèngqū; Cantonese IPA: /tɐk6piːt6 hɐŋ4tsɪŋ3kʰɵy1/; Jyutping: dak6bit6 hang4zing3keoi1; Yale: dahkbiht hàhngjingkeūi) is a political subdivision of the Peoples Republic of China. ... Perm Krai (Russian: ) is a federal subject of Russia that came into existence on December 1, 2005 as a result of the 2004 referendum on the merger of Perm Oblast and Permyakia Autonomous District. ... Tarax is an Australian brand of soft drink. ... Binomial name Smilax regelii Killip & Morton Sarsaparilla (Smilax regelii and other closely related species of Smilax) is a vine that bears roots with many useful properties. ...
SAR systems take advantage of the long-range propagation characteristics of radar signals and the complex information processing capability of modern digital electronics to provide high resolution imagery.
A detailed description of the theory of operation of SAR is complex and beyond the scope of this document.
Since SARs are much lower in frequency than optical systems, even moderate SAR resolutions require an antenna physically larger than can be practically carried by an airborne platform: antenna lengths several hundred meters long are often required.
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