RE: Elevation of observations
Alphonse POUPLIER (alphonse.pouplier@skynet.be)
Thu, 1 Jan 1998 12:20:51 +0100 (MET)
>From Jeff Hunt:
>...
>Unless you are at an appreciable high altitude I don't think your
>prediction program will need accurate info as I believe the data only
>affects your local horizon. Perhaps someone on the list may know why
>local elevation might be important.
I give here an excerpt of a message I sent one day to my list:
" I'm surprised to see that many members give in their signature
" their elevation even if it is less than 1000 m.
" It is asked for in my programs but it is also sayd that it's not important.
" My programs take it into acount but for less than 1000m,
" the difference is neglectible.
" A typical example (unfavorable): A satellite "flying" at 350 Km.
" The maximal difference between an elevation of zero and 1000 m
" is 0.084 degrees for the altitude over the horizon...!
My pleasure, avec plaisir, Alphonse URL:http://users.skynet.be/alphonse/
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