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on this file since 9488 was 731, checked in by tbretz, 24 years ago |
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1 | #include "slalib.h"
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2 | #include "slamac.h"
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3 | double slaEpb ( double date )
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4 | /*
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5 | ** - - - - - - -
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6 | ** s l a E p b
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7 | ** - - - - - - -
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8 | **
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9 | ** Conversion of Modified Julian Date to Besselian epoch.
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10 | **
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11 | ** (double precision)
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12 | **
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13 | ** Given:
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14 | ** date double Modified Julian Date (JD - 2400000.5)
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15 | **
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16 | ** The result is the Besselian epoch.
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17 | **
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18 | ** Reference:
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19 | ** Lieske,J.H., 1979. Astron. Astrophys.,73,282.
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20 | **
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21 | ** Last revision: 31 October 1993
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22 | **
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23 | ** Copyright P.T.Wallace. All rights reserved.
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24 | */
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25 | {
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26 | return 1900.0 + ( date - 15019.81352 ) / 365.242198781;
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27 | }
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