diff options
Diffstat (limited to 'positioner.c')
| -rw-r--r-- | positioner.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/positioner.c b/positioner.c index 7adcc735..8b9d2703 100644 --- a/positioner.c +++ b/positioner.c @@ -7,7 +7,7 @@ * For an explanation (in German) of the theory behind the calculations see * http://www.vdr-portal.de/board17-developer/board97-vdr-core/p1154305-grundlagen-und-winkelberechnungen-f%C3%BCr-h-h-diseqc-motor-antennenanlagen * - * $Id: positioner.c 3.1 2013/08/21 11:02:52 kls Exp $ + * $Id: positioner.c 3.2 2013/10/10 14:14:10 kls Exp $ */ #include "positioner.h" @@ -49,20 +49,20 @@ int cPositioner::NormalizeAngle(int Angle) int cPositioner::CalcHourAngle(int Longitude) { - double Delta = RAD(Longitude - Setup.SiteLon); + double Alpha = RAD(Longitude - Setup.SiteLon); double Lat = RAD(Setup.SiteLat); int Sign = Setup.SiteLat >= 0 ? -1 : 1; // angles to the right are positive, angles to the left are negative - return Sign * round(DEG(atan2(sin(Delta), cos(Delta) - cos(Lat) * SAT_EARTH_RATIO))); + return Sign * round(DEG(atan2(sin(Alpha), cos(Alpha) - cos(Lat) * SAT_EARTH_RATIO))); } int cPositioner::CalcLongitude(int HourAngle) { double Lat = RAD(Setup.SiteLat); double Lon = RAD(Setup.SiteLon); - double Alpha = RAD(HourAngle); - double Delta = Alpha - asin(sin(M_PI - Alpha) * cos(Lat) * SAT_EARTH_RATIO); + double Delta = RAD(HourAngle); + double Alpha = Delta - asin(sin(M_PI - Delta) * cos(Lat) * SAT_EARTH_RATIO); int Sign = Setup.SiteLat >= 0 ? 1 : -1; - return NormalizeAngle(round(DEG(Lon - Sign * Delta))); + return NormalizeAngle(round(DEG(Lon - Sign * Alpha))); } int cPositioner::HorizonLongitude(ePositionerDirection Direction) |