Generally, synthetic means pertaining to synthesis, i.e., the putting-together of two or more parts into a coherent whole, whether by design or by natural processes. Synthesis (from the ancient Greek σÏν (with) and θεσις (placing), is commonly understood to be an integration of two or more pre-existing elements which results in a new creation. ...
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Synthetic aperture radar complements photographic and other optical imaging capabilities because of the minimum constraints on time-of-day and atmospheric conditions and because of the unique responses of terrain and cultural targets to radar frequencies.
Synthetic aperture radar technology has provided terrain structural information to geologists for mineral exploration, oil spill boundaries on water to environmentalists, sea state and ice hazard maps to navigators, and reconnaissance and targeting information to military operations.
Range measurement and resolution are achieved in synthetic aperture radar in the same manner as most other radars: Range is determined by precisely measuring the time from transmission of a pulse to receiving the echo from a target and, in the simplest SAR, range resolution is determined by the transmitted pulse width, i.e.
Nearly all synthetic inorganic pigments were discovered or identified in the grand European flowering of inorganic chemistry that occurred in the century after 1750, when European industries sponsored intensive minerological and metallurgical research, and early chemists isolated and identified many new metallic elements — cadmium, cobalt, chromium, zinc, manganese, magnesium, and so on.
Synthetic manufacture was known at least by the 15th century, though large scale production (and common use in artists' paints) did not emerge until the middle 19th century.
This synthetic inorganic pigment was made from the urine of cows fed on mango leaves; crystals of the concentrated dried urine were formed into balls and covered with mud for shipment to England.
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