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ZD

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If you want to be happy for a year, plant a garden; If you want to be happy for life, plant a tree.
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English

Abbreviation

ZD

  1. zenith distance

[1]

  1. z_t is now ZD (true zenith distance)
    --California Institute of Technology

[2]

  1. limit in zenith distance ZD: ZD < 70°
    --European Southern Observatory

[3]

References

^ Acronym Finder <http://www.acronymfinder.com/af-query.asp?String=exact&Acronym=ZD&Find=Find> Accessed February 14, 2006.

^ California Institute of Technology <http://unagi.caltech.edu/notes/diff_refract/adr_rateofmotion.pro> Accessed 15 Feb. 2006.

^ "HARPS: The 3.6m Telescope," European Southern Observatory <http://www.ls.eso.org/lasilla/sciops/3p6/harps/telescope.html> Accessed 15 Feb. 2006.

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