public static double EclipticLongitude(double JD, bool bHighPrecision)
{
if (bHighPrecision)
{
return(AASCoordinateTransformation.MapTo0To360Range(AASCoordinateTransformation.RadiansToDegrees(AASVSOP87D_Neptune.L(JD))));
}
double rho = (JD - 2451545) / 365250;
double rhosquared = rho * rho;
double rhocubed = rhosquared * rho;
double rho4 = rhocubed * rho;
//Calculate L0
int nL0Coefficients = g_L0NeptuneCoefficients.Length;
double L0 = 0;
int i;
for (i = 0; i < nL0Coefficients; i++)
{
L0 += g_L0NeptuneCoefficients[i].A * Math.Cos(g_L0NeptuneCoefficients[i].B + g_L0NeptuneCoefficients[i].C * rho);
}
//Calculate L1
int nL1Coefficients = g_L1NeptuneCoefficients.Length;
double L1 = 0;
for (i = 0; i < nL1Coefficients; i++)
{
L1 += g_L1NeptuneCoefficients[i].A * Math.Cos(g_L1NeptuneCoefficients[i].B + g_L1NeptuneCoefficients[i].C * rho);
}
//Calculate L2
int nL2Coefficients = g_L2NeptuneCoefficients.Length;
double L2 = 0;
for (i = 0; i < nL2Coefficients; i++)
{
L2 += g_L2NeptuneCoefficients[i].A * Math.Cos(g_L2NeptuneCoefficients[i].B + g_L2NeptuneCoefficients[i].C * rho);
}
//Calculate L3
int nL3Coefficients = g_L3NeptuneCoefficients.Length;
double L3 = 0;
for (i = 0; i < nL3Coefficients; i++)
{
L3 += g_L3NeptuneCoefficients[i].A * Math.Cos(g_L3NeptuneCoefficients[i].B + g_L3NeptuneCoefficients[i].C * rho);
}
//Calculate L4
int nL4Coefficients = g_L4NeptuneCoefficients.Length;
double L4 = 0;
for (i = 0; i < nL4Coefficients; i++)
{
L4 += g_L4NeptuneCoefficients[i].A * Math.Cos(g_L4NeptuneCoefficients[i].B + g_L4NeptuneCoefficients[i].C * rho);
}
double value = (L0 + L1 * rho + L2 * rhosquared + L3 * rhocubed + L4 * rho4) / 100000000;
//convert results back to degrees
value = AASCoordinateTransformation.MapTo0To360Range(AASCoordinateTransformation.RadiansToDegrees(value));
return(value);
}
public void LTest(double jd, double expectedResult)
{
double result = AASVSOP87D_Neptune.L(jd);
Assert.Equal(expectedResult, result);
}