/usr/include/libnova/solar.h is in libnova-dev 0.14.0-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2000 - 2005 Liam Girdwood
*/
#ifndef _LN_SOLAR_H
#define _LN_SOLAR_H
#include <libnova/ln_types.h>
#define LN_SOLAR_STANDART_HORIZON -0.8333
#define LN_SOLAR_CIVIL_HORIZON -6.0
#define LN_SOLAR_NAUTIC_HORIZON -12.0
#define LN_SOLAR_ASTRONOMICAL_HORIZON -18.0
#ifdef __cplusplus
extern "C" {
#endif
/*! \defgroup solar Solar
*
* Calculate solar ecliptical/equatorial coordinates for a given julian date.
* Accuracy 0.01 arc second error - uses VSOP87 solution.
*
* All angles are expressed in degrees.
*/
/*! \fn int ln_get_solar_rst_horizon (double JD, struct ln_lnlat_posn * observer, double horizon, struct ln_rst_time *rst);
* \brief Return solar rise/set time over local horizon (specified in degrees).
* \ingroup solar
*/
int LIBNOVA_EXPORT ln_get_solar_rst_horizon (double JD, struct ln_lnlat_posn * observer, double horizon, struct ln_rst_time * rst);
/*! \fn int ln_get_solar_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rst_time * rst);
* \brief Calculate the time of rise, set and transit for the Sun.
* \ingroup solar
*/
int LIBNOVA_EXPORT ln_get_solar_rst (double JD, struct ln_lnlat_posn * observer, struct ln_rst_time * rst);
/*! \fn void ln_get_solar_geom_coords (double JD, struct ln_helio_posn * position);
* \brief Calculate solar geometric coordinates.
* \ingroup solar
*/
void LIBNOVA_EXPORT ln_get_solar_geom_coords (double JD, struct ln_helio_posn * position);
/*! \fn void ln_get_solar_equ_coords (double JD, struct ln_equ_posn * position);
* \brief Calculate apparent equatorial coordinates.
* \ingroup solar
*/
void LIBNOVA_EXPORT ln_get_solar_equ_coords (double JD, struct ln_equ_posn * position);
/*! \fn void ln_get_solar_ecl_coords (double JD, struct ln_lnlat_posn * position);
* \brief Calculate apparent ecliptical coordinates.
* \ingroup solar
*/
void LIBNOVA_EXPORT ln_get_solar_ecl_coords (double JD, struct ln_lnlat_posn * position);
/*! \fn void ln_get_solar_geo_coords (double JD, struct ln_rect_posn * position)
* \brief Calculate geocentric coordinates (rectangular)
* \ingroup solar
*/
void LIBNOVA_EXPORT ln_get_solar_geo_coords (double JD, struct ln_rect_posn * position);
/*! \fn double ln_get_solar_sdiam (double JD)
* \brief Calculate the semidiameter of the Sun in arc seconds.
* \ingroup solar
*/
double LIBNOVA_EXPORT ln_get_solar_sdiam (double JD);
#ifdef __cplusplus
};
#endif
#endif
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