public static CroodRaDec FromAzAltToRaDec(CroodLonLat Location, CroodAzAlt AzAlt, Angle LST)
{
Angle HA = Math.Atan2(Math.Sin(AzAlt.Az + Math.PI), Math.Cos(AzAlt.Az + Math.PI) * Math.Sin(Location.Lat) + Math.Tan(AzAlt.Alt) * Math.Cos(Location.Lat));
Angle DEC = Math.Asin(Math.Sin(Location.Lat) * Math.Sin(AzAlt.Alt) - Math.Cos(Location.Lat) * Math.Cos(AzAlt.Alt) * Math.Cos(AzAlt.Az + Math.PI));
Angle RA = LST - HA;
return(new CroodRaDec(RA, DEC));
}
/// Compute Ra Dec
public static CroodAzAlt FromRaDecToAzAlt(CroodLonLat Location, CroodRaDec RaDec, Angle LST)
{
Angle Ha = LST - RaDec.Ra;
double Az = Math.Atan2(Math.Sin(Ha), Math.Cos(Ha)
* Math.Sin(Location.Lat) - Math.Tan(RaDec.Dec) * Math.Cos(Location.Lat));
double Alt = Math.Asin(Math.Sin(Location.Lat) * Math.Sin(RaDec.Dec)
+ Math.Cos(Location.Lat) * Math.Cos(RaDec.Dec) * Math.Cos(Ha));
return(new CroodAzAlt(Az + Math.PI, Alt));
}
public static double GetLocalSiderialTime(CroodLonLat Location, DateTime LocalTime, int TimeZoneInHour, bool IsDayLightSaving)
{
var ST = GetSiderialTime(LocalTime, TimeZoneInHour, IsDayLightSaving);
return(ST - Location.Lon);
}
public static CroodRaDec FromAzAltToRaDec(CroodLonLat Location, CroodAzAlt AzAlt, Angle LST)
{
Angle HA = Math.Atan2(Math.Sin(AzAlt.Az + Math.PI), Math.Cos(AzAlt.Az + Math.PI) * Math.Sin(Location.Lat) + Math.Tan(AzAlt.Alt) * Math.Cos(Location.Lat));
Angle DEC = Math.Asin(Math.Sin(Location.Lat) * Math.Sin(AzAlt.Alt) - Math.Cos(Location.Lat) * Math.Cos(AzAlt.Alt) * Math.Cos(AzAlt.Az + Math.PI));
Angle RA = LST - HA;
return new CroodRaDec(RA, DEC);
}
/// Compute Ra Dec
public static CroodAzAlt FromRaDecToAzAlt(CroodLonLat Location, CroodRaDec RaDec, Angle LST)
{
Angle Ha = LST - RaDec.Ra;
double Az = Math.Atan2(Math.Sin(Ha), Math.Cos(Ha)
* Math.Sin(Location.Lat) - Math.Tan(RaDec.Dec) * Math.Cos(Location.Lat));
double Alt = Math.Asin(Math.Sin(Location.Lat) * Math.Sin(RaDec.Dec)
+ Math.Cos(Location.Lat) * Math.Cos(RaDec.Dec) * Math.Cos(Ha));
return new CroodAzAlt(Az + Math.PI, Alt);
}
public static double GetLocalSiderialTime(CroodLonLat Location, DateTime LocalTime, int TimeZoneInHour, bool IsDayLightSaving)
{
var ST = GetSiderialTime(LocalTime, TimeZoneInHour, IsDayLightSaving);
return ST - Location.Lon;
}
