/// <summary>
/// Get Position of Venus and Mars
/// </summary>
/// <param name="planetNo"></param>
/// <param name="T"></param>
/// <returns></returns>
private static Xyz GetPosExp1(int planetNo, double T)
{
PlanetExpP0[] ParamL0, ParamL1, ParamQ;
PlanetExpP1 ParamP;
switch (planetNo)
{
case Planet.VENUS:
ParamL0 = VenusL0;
ParamL1 = VenusL1;
ParamQ = VenusQ;
ParamP = VenusP;
break;
case Planet.MARS:
ParamL0 = MarsL0;
ParamL1 = MarsL1;
ParamQ = MarsQ;
ParamP = MarsP;
break;
default:
throw new ArithmeticException();
}
double L1 = (ParamP.L6 + ParamP.L7 * T) * UdMath.udsin(ParamP.L8 + ParamP.L9 * T);
for (int i = 0; i < ParamL1.GetLength(0); i++)
{
L1 += ParamL1[i].a * UdMath.udsin(ParamL1[i].b + ParamL1[i].c * T);
}
double L0 = ParamP.L1 + ParamP.L2 * T + ParamP.L3 * UdMath.udsin(ParamP.L4 + ParamP.L5 * T + 2.0 * L1);
for (int i = 0; i < ParamL0.GetLength(0); i++)
{
L0 += ParamL0[i].a * UdMath.udsin(ParamL0[i].b + ParamL0[i].c * T);
}
double lambda = UdMath.deg2rad(UdMath.degmal(L0 + L1));
double beta = Math.Asin(ParamP.B1 * UdMath.udsin(ParamP.B2 + ParamP.B3 * T + L1));
double q = (ParamP.q1 + ParamP.q2 * T) * UdMath.udcos(ParamP.q3 + ParamP.q4 * T) + ParamP.q5;
for (int i = 0; i < ParamQ.GetLength(0); i++)
{
q += ParamQ[i].a * UdMath.udcos(ParamQ[i].b + ParamQ[i].c * T);
}
double radius = Math.Pow(10.0, q);
return(new Xyz(radius * Math.Cos(beta) * Math.Cos(lambda),
radius * Math.Cos(beta) * Math.Sin(lambda),
radius * Math.Sin(beta)));
}
/// <summary>
/// Get Position of Jupiter and Saturn
/// </summary>
/// <param name="planetNo"></param>
/// <param name="T"></param>
/// <returns></returns>
private static Xyz GetPosExp2(int planetNo, double T)
{
PlanetExpP0[] ParamN, ParamB, ParamQ;
PlanetExpP2 ParamP;
double q, N;
switch (planetNo)
{
case Planet.JUPITER:
ParamN = JupiterN;
ParamB = JupiterB;
ParamQ = JupiterQ;
ParamP = JupiterP;
N = 341.5208 + 30.34907 * T;
N += (0.0350 + 0.00028 * T) * UdMath.udsin(245.94 - 30.349 * T) + 0.0004;
N -= (0.0019 + 0.00002 * T) * UdMath.udsin(162.78 + 0.38 * T);
q = (0.000132 + 0.0000011 * T) * UdMath.udcos(245.93 - 30.349 * T);
break;
case Planet.SATURN:
ParamN = SaturnN;
ParamB = SaturnB;
ParamQ = SaturnQ;
ParamP = SaturnP;
N = 12.3042 + 12.22117 * T;
N += (0.0934 + 0.00075 * T) * UdMath.udsin(250.29 + 12.221 * T) + 0.0008;
N += (0.0057 + 0.00005 * T) * UdMath.udsin(265.8 - 11.81 * T);
N += (0.0049 + 0.00004 * T) * UdMath.udsin(162.7 + 0.38 * T);
N += (0.0019 + 0.00002 * T) * UdMath.udsin(262.0 + 24.44 * T);
q = (0.000354 + 0.0000028 * T) * UdMath.udcos(70.28 + 12.22 * T) + 0.000183;
q += (0.000021 + 0.0000002 * T) * UdMath.udcos(265.80 - 11.81 * T);
break;
default:
throw new ArithmeticException();
}
// Lambda
for (int i = 0; i < ParamN.GetLength(0); i++)
{
N += ParamN[i].a * UdMath.udsin(ParamN[i].b + ParamN[i].c * T);
}
double f = N + ParamP.f1 * UdMath.udsin(N)
+ ParamP.f2 * UdMath.udsin(2.0 * N)
+ ParamP.f3 * UdMath.udsin(3.0 * N)
+ ParamP.f4 * UdMath.udsin(4.0 * N);
double V = ParamP.V1 * UdMath.udsin(2.0 * f + ParamP.V2);
double lambda = UdMath.deg2rad(UdMath.degmal(f + V + ParamP.L1 + ParamP.L2 * T));
// Beta
double beta = Math.Asin(ParamP.B1 * UdMath.udsin(f + ParamP.B2)) + UdMath.deg2rad((ParamP.B3 + ParamP.B4 * T) * UdMath.udsin(f + ParamP.B5));
for (int i = 0; i < ParamB.GetLength(0); i++)
{
beta += ParamB[i].a * UdMath.udsin(ParamB[i].b + ParamB[i].c * T);
}
// Radius
for (int i = 0; i < ParamQ.GetLength(0); i++)
{
q += ParamQ[i].a * UdMath.udcos(ParamQ[i].b + ParamQ[i].c * T);
}
double r = Math.Pow(10.0, q);
double radius = r * ParamP.r1 / (1.0 + ParamP.r2 * UdMath.udcos(f));
return(new Xyz(radius * Math.Cos(beta) * Math.Cos(lambda),
radius * Math.Cos(beta) * Math.Sin(lambda),
radius * Math.Sin(beta)));
}
