Willie Koorts asked: > If I may ask a stupid question, I assume "sub-recurrent" > refers to "return > to the same point every 4 days". Correct? If not, can > someone please explain a sub-recurrent orbit to me. Correct. This was my first encounter with the term "sub-recurrent". The results of a google search suggest that the term is used almost exclusively by Japan to denote a ground track that repeats after some number of days. I am more familiar with the term resonant ground track. I found the following explanation of "sub-recurrent": http://www.eoc.nasda.go.jp/experience/rm_kiso/satellit_type_orbit_e.html Ted Molczan ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
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