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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
25 extern "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 */
45 void LIBNOVA_EXPORT ln_get_earth_helio_coords (double JD, struct ln_helio_posn * position);
46
52 /* Chapter ?? */
53 double LIBNOVA_EXPORT ln_get_earth_solar_dist (double JD);
54
59 void LIBNOVA_EXPORT ln_get_earth_rect_helio (double JD, struct ln_rect_posn * position);
60
65 void 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
ln_get_earth_solar_dist
double ln_get_earth_solar_dist(double JD)
Calculate the distance between Earth and the Sun.
Definition: earth.c:2772
ln_rect_posn
Rectangular coordinates.
Definition: ln_types.h:237
ln_helio_posn
Heliocentric position.
Definition: ln_types.h:216
ln_get_earth_centre_dist
void ln_get_earth_centre_dist(float height, double latitude, double *p_sin_o, double *p_cos_o)
Calculate Earth globe centre distance.
Definition: earth.c:2793
ln_get_earth_rect_helio
void ln_get_earth_rect_helio(double JD, struct ln_rect_posn *position)
Calculate the Earths rectangular heliocentric coordinates.
Definition: earth.c:2813
ln_get_earth_helio_coords
void ln_get_earth_helio_coords(double JD, struct ln_helio_posn *position)
Calculate Earth&#39;s heliocentric coordinates.
Definition: earth.c:2699