Filter

From Glossary of Meteorology
Revision as of 18:01, 26 January 2012 by imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == filter == </div> #<div class="definition"><div class="short_definition">Any material that, ...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)



filter

  1. Any material that, by absorption or reflection, selectively modifies the radiation transmitted through an optical system.

  2. To remove a certain component or components of radiation, usually by means of a filter, although other devices may be used.

  3. A mathematical tool used to remove information within certain frequency (
    or wavelength) limits from a time (
    or space) series of data.

    Filters are commonly used to remove high (low) frequency oscillations from a dataset when oscillations of low (high) frequency are of interest.