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USNOAAD Vocabulary

Definitions of various terms related to data from the U.S. Naval Observatory Astronomical Applications Department.

Properties

namespace:: http://purl.org/net/vocab/2004/04/usnoaad#

type:: http://web.resource.org/cc/Work

maker:: Morten Høybye Frederiksen

imports:: http://www.w3.org/2002/07/owl

imports:: http://www.w3.org/2000/01/rdf-schema

license:: http://creativecommons.org/licenses/by/1.0/

created:: 2004-04-25

seeAlso:: http://www.wasab.dk/morten/2004/04/twilight/index.rdf

Properties

civil twilight begins (`civil-twilight-begin`)

Before sunrise, when the center of the Sun is geometrically 6 degrees below the horizon.

isDefinedBy:: http://purl.org/net/vocab/2004/04/usnoaad

type:: http://www.w3.org/2002/07/owl#DatatypeProperty

civil twilight ends (`civil-twilight-end`)

After sunset, when the center of the Sun is geometrically 6 degrees below the horizon.

type:: http://www.w3.org/2002/07/owl#DatatypeProperty

isDefinedBy:: http://purl.org/net/vocab/2004/04/usnoaad

sun in zenith (`sun-transit`)

When the center of the Sun crosses the observer's meridian running from north to south.

isDefinedBy:: http://purl.org/net/vocab/2004/04/usnoaad

type:: http://www.w3.org/2002/07/owl#DatatypeProperty

sunrise (`sunrise`)

When the upper edge of the disk of the Sun reaches the horizon from below.

type:: http://www.w3.org/2002/07/owl#DatatypeProperty

isDefinedBy:: http://purl.org/net/vocab/2004/04/usnoaad

sunset (`sunset`)

When the upper edge of the disk of the Sun reaches the horizon from above.

isDefinedBy:: http://purl.org/net/vocab/2004/04/usnoaad

type:: http://www.w3.org/2002/07/owl#DatatypeProperty