libnova: proper_motion.h Source File

00001 /*
00002  *  This library is free software; you can redistribute it and/or
00003  *  modify it under the terms of the GNU Lesser General Public
00004  *  License as published by the Free Software Foundation; either
00005  *  version 2 of the License, or (at your option) any later version.
00006  *
00007  *  This library is distributed in the hope that it will be useful,
00008  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00009  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00010  *  Lesser General Public License for more details.
00011  *
00012  *  You should have received a copy of the GNU General Public License
00013  *  along with this program; if not, write to the Free Software
00014  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00015  *  
00016  *  Copyright (C) 2000 - 2005 Liam Girdwood  
00017  */
00018 
00019 #ifndef _LN_PROPER_MOTION_H
00020 #define _LN_PROPER_MOTION_H
00021 
00022 #include <libnova/ln_types.h>
00023 
00024 #ifdef __cplusplus
00025 extern "C" {
00026 #endif
00027 
00039 /* Equ 20.2, 20.3, 20.4 pg 126 */
00040 void LIBNOVA_EXPORT ln_get_equ_pm (struct ln_equ_posn * mean_position, struct ln_equ_posn * proper_motion, double JD, struct ln_equ_posn * position);
00041 
00042 
00046 /* Equ 20.2, 20.3, 20.4 pg 126 
00047 */
00048 void LIBNOVA_EXPORT ln_get_equ_pm_epoch (struct ln_equ_posn * mean_position, struct ln_equ_posn * proper_motion, double JD, double epoch_JD, struct ln_equ_posn * position);
00049 #ifdef __cplusplus
00050 };
00051 #endif
00052 
00053 #endif