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<p>contains definitions of structures used for time calculations.
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typedef struct <a class="el" href="structut__instant.html">ut_instant</a> </td><td class="memItemRight" valign="bottom"><b>UTinstant</b></td></tr>
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typedef struct <a class="el" href="structut__instant.html">ut_instant</a> * </td><td class="memItemRight" valign="bottom"><b>UTinstantPtr</b></td></tr>
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<tr class="memitem:a45de6b3b6e622aed44641b4014bd85d1"><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="astime_8h.html#a45de6b3b6e622aed44641b4014bd85d1">caldat</a> (<a class="el" href="structut__instant.html">UTinstantPtr</a>))</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>contains definitions of structures used for time calculations. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a45de6b3b6e622aed44641b4014bd85d1">◆ </a></span>caldat()</h2>
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<td class="memname">long caldat </td>
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<p>Converts julian date to year,mo,da </p><dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000001">Deprecated:</a></b></dt><dd>use <a class="el" href="astime_8h.html#ade0421d368a2914b2e2cf0634bdd1a1b">caldat_int()</a> instead </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ade0421d368a2914b2e2cf0634bdd1a1b">◆ </a></span>caldat_int()</h2>
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<td class="memname">void caldat_int </td>
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<p>caldat computes the day of the week, the day of the year the gregorian (or julian) calendar date from the julian decimal date. for astronomical purposes, The Gregorian calendar reform occurred on 15 Oct. 1582. This is 05 Oct 1582 by the julian calendar.</p>
<p>Input: a <a class="el" href="structut__instant.html">ut_instant</a> structure pointer, where the j_date element has been set. ( = 0 for 01 Jan 4713 B.C.)</p>
<p>output: will set all the other elements of the structure. As a convenience, the function will also return the year.</p>
<p>Reference: Astronomial formulae for calculators, meeus, p 23 from fortran program by F. Espenak - April 1982 Page 277, 50 Year canon of solar eclipses: 1986-2035 </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1c6a160930d1c125892a81813a0d8d4b">◆ </a></span>juldat()</h2>
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<td class="memname">double juldat </td>
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<td class="paramtype"><a class="el" href="structut__instant.html">UTinstantPtr</a> </td>
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<p>Returns julian day from year,mo,da </p><dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000002">Deprecated:</a></b></dt><dd>use <a class="el" href="astime_8h.html#a3cc1a455b453977f754842b9666440a2">juldat_int()</a> instead </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a3cc1a455b453977f754842b9666440a2">◆ </a></span>juldat_int()</h2>
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<td class="memname">void juldat_int </td>
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<p>juldat computes the julian decimal date (j_date) from the gregorian (or Julian) calendar date. for astronomical purposes, The Gregorian calendar reform occurred on 15 Oct. 1582. This is 05 Oct 1582 by the julian calendar. Input: a <a class="el" href="structut__instant.html">ut_instant</a> structure pointer where Day, Month, Year have been set for the date in question.</p>
<p>Output: the j_date and weekday elements of the structure will be set. Also, the return value of the function will be the j_date too.</p>
<p>Reference: Astronomial formulae for calculators, meeus, p 23 from fortran program by F. Espenak - April 1982 Page 276, 50 Year canon of solar eclipses: 1986-2035 </p>
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