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Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
Explains how orbit determinations based on short data arcs from a single day's tracking provide the basis for SAR processing, locating individual pixels, and mosaicking the image strips. The final data are sufficiently accurate to allow mosaicking of image data strips by a process of dead reckoning without the use of tie points.
Descriptions and MPEG movies that take you on exciting trips. These movies are scientifically accurate computer animations made with strict adherence to Einstein's General Theory of Relativity. The descriptions are written to be understandable on a variety of levels - from the casually curious to the professionally inquisitive.(a NASA supported site)