almucantar

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almucantar

(al-myŭ-kan -ter) A small circle on the celestial sphere parallel to the horizon.

almucantar

[¦al·myü¦kan·tər]

(astronomy)

parallel of altitude

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References in periodicals archive ?

The circles of this grid, known by their Arabic term almucantars, are altitude lines above your local horizon.

The Astrolabe: astronomy's first hot app: loaded with features, an ancient analog computer replicates the sky's workings

1995, Systematic deformations of the apparent almucantar in homogenization astrolabe data for new solution of Earth orientation parameters from optical astrometry.

Earth orientation parameters based on EOC-4 astrometric catalog

Besides the hemispheric image, all information (RGB values, cloud classification, and cloud cover) are extracted from almucantar apertures at 30[degrees] and 45[degrees] elevation in order to be analyzed together with corresponding azimuth scans of HATPRO and MIRA-36.

JOYCE: Julich Observatory for Cloud Evolution: a state-of-the-art array of scanning remote sensing and in situ instruments aims to provide insight into the transition of water vapor to clouds and clouds to precipitation under the influence of different forcing conditions

She points out, for example, that "the projection of the semicircular ribs of the Trinity barrel vault is directly analogous to the astrolabist's method of projecting almucantars (circles of celestial latitude) ranging above the observed horizon" (99).