ZD

From Fresh Dictionary

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English

Abbreviation

ZD

1. zenith distance^[1]

   z_t is now ZD (true zenith distance)

   --California Institute of Technology^[2]

   limit in zenith distance ZD: ZD < 70°

   --European Southern Observatory^[3]

References

1. ^ Acronym Finder <http://www.acronymfinder.com/af-query.asp?String=exact&Acronym=ZD&Find=Find> Accessed February 14, 2006.
2. ^ California Institute of Technology <http://unagi.caltech.edu/notes/diff_refract/adr_rateofmotion.pro> Accessed 15 Feb. 2006.
3. ^ "HARPS: The 3.6m Telescope," European Southern Observatory <http://www.ls.eso.org/lasilla/sciops/3p6/harps/telescope.html> Accessed 15 Feb. 2006.