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planetsephems/sideral_time.h

00001 /*
00002 Copyright (C) 2000 Liam Girdwood <liam@nova-ioe.org>
00003 Copyright (C) 2003 Fabien Chereau
00004 
00005 This program is free software; you can redistribute it and/or modify
00006 it under the terms of the GNU Library General Public License as published by
00007 the Free Software Foundation; either version 2 of the License, or
00008 (at your option) any later version.
00009 
00010 This program is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 GNU General Public License for more details.
00014 
00015 You should have received a copy of the GNU General Public License
00016 along with this program; if not, write to the Free Software
00017 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00018 */
00019 
00020 #ifndef _STELLASTRO_H
00021 #define _STELLASTRO_H
00022 
00023 #ifdef __cplusplus
00024 extern "C" {
00025 #endif
00026 
00027 /* Calculate mean sidereal time from date. */
00028 double get_mean_sidereal_time (double JD);
00029 
00030 /* Calculate apparent sidereal time from date.*/
00031 double get_apparent_sidereal_time (double JD);
00032 
00033 /* Calculate Earth globe centre distance. */
00034 void get_earth_centre_dist (float height, double latitude, double * p_sin_o, double * p_cos_o);
00035 
00036 /* Calculate the adjustment in altitude of a body due to atmospheric refraction. */
00037 double get_refraction_adj (double altitude, double atm_pres, double temp);
00038 
00039 #ifdef __cplusplus
00040 }
00041 #endif
00042 
00043 
00044 #endif /* _STELLASTRO_H */

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