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TeachMeFinance.com - explain synthetic aperture radar (SAR) synthetic aperture radar (SAR) The term 'synthetic aperture radar (SAR)' as it applies to the area of Earth observation can be defined as ' A high-resolution ground-mapping technique that effectively synthesizes a large receiving antenna by processing the phase of the reflected radar return. The along-track resolution is obtained by timing the radar return (time-gating) as for ordinary radar. The cross-track (azimuthal) resolution is obtained by processing the Doppler phase of the radar return. The cross-track 'dimension' of the antenna is a function of the length of time over which the Doppler phase is collected. See Doppler effect'. Previous 5 Terms: Synoptic Weather SYNS syntax Synteny synthesize Next 5 Terms: Synthetic earthquake Synthetic natural gas (SNG) syphilology syphilophobia syringadenous About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.