libnova v 0.15.0
earth.h
1/*
2 * This library is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU Lesser General Public
4 * License as published by the Free Software Foundation; either
5 * version 2 of the License, or (at your option) any later version.
6 *
7 * This library is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * Lesser General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15 *
16 * Copyright (C) 2000 - 2005 Liam Girdwood
17 */
18
19#ifndef _LN_EARTH_H
20#define _LN_EARTH_H
21
22#include <libnova/ln_types.h>
23
24#ifdef __cplusplus
25extern "C" {
26#endif
27
28
36/*
37** Earth
38*/
39
44/* Chapter 31 Pg 206-207 Equ 31.1 31.2 , 31.3 using VSOP 87 */
45void LIBNOVA_EXPORT ln_get_earth_helio_coords (double JD, struct ln_helio_posn * position);
46
52/* Chapter ?? */
53double LIBNOVA_EXPORT ln_get_earth_solar_dist (double JD);
54
59void LIBNOVA_EXPORT ln_get_earth_rect_helio (double JD, struct ln_rect_posn * position);
60
65void LIBNOVA_EXPORT ln_get_earth_centre_dist (float height, double latitude, double * p_sin_o, double * p_cos_o);
66
67#ifdef __cplusplus
68};
69#endif
70
71#endif
Heliocentric position.
Definition ln_types.h:217
Rectangular coordinates.
Definition ln_types.h:238