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// This file is available in electronic form at http://www.psa.es/sdg/sunpos.htm
#ifndef __SUNPOS_H
#define __SUNPOS_H
// Declaration of some constants
#define pi 3.14159265358979323846
#define twopi (2*pi)
#define rad (pi/180)
#define dEarthMeanRadius 6371.01 // In km
#define dAstronomicalUnit 149597890 // In km
struct cTime{ int iYear; int iMonth; int iDay; double dHours; double dMinutes; double dSeconds;};
struct cLocation{ double dLongitude; double dLatitude;};
struct cSunCoordinates{ double dZenithAngle; double dAzimuth;};
void sunpos(cTime udtTime, cLocation udtLocation, cSunCoordinates *udtSunCoordinates);
#endif
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