An Epoch date is usually the instant at which a set of two body orbital elements are valid for. In astronomy we usually refer to it as an "Epoch of Osculation" and it specifies the time at which the elements for calculated for, including the affects of any perturbation on the orbit of the object (be it satellite or asteroid or planet...). Jim. On Sun, 23 Jun 2002, Joseph Kern wrote: > > What exactly is an Epoch date? > Jim Scotti Lunar & Planetary Laboratory jscotti@pirl.lpl.arizona.edu University of Arizona Tucson, AZ 85721 USA http://www.lpl.arizona.edu/~jscotti/ ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/sat/seesat/seesatindex.html
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