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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 */