private void Initialize()
{
if (!IsValidLineLength(Line1))
{
throw new TleException("Invalid length for line one");
}
if (!IsValidLineLength(Line2))
{
throw new TleException("Invalid length for line two");
}
if (Line1[0] != '1')
{
throw new TleException("Invalid line beginning for line one");
}
if (Line2[0] != '2')
{
throw new TleException("Invalid line beginning for line two");
}
ExtractInteger(Line1.Substring(Tle1ColNoradnum,
Tle1LenNoradnum), out var satNumber1);
ExtractInteger(Line2.Substring(Tle2ColNoradnum,
Tle2LenNoradnum), out var satNumber2);
if (satNumber1 != satNumber2)
{
throw new TleException("Satellite numbers do not match");
}
NoradNumber = satNumber1;
if (Name == "")
{
Name = Line1.Substring(Tle1ColNoradnum, Tle1LenNoradnum);
}
IntDesignator = Line1.Substring(Tle1ColIntldescA,
Tle1LenIntldescA + Tle1LenIntldescB + Tle1LenIntldescC);
ExtractInteger(Line1.Substring(Tle1ColEpochA,
Tle1LenEpochA), out var year);
ExtractDouble(Line1.Substring(Tle1ColEpochB,
Tle1LenEpochB), 4, out var day);
ExtractDouble(Line1.Substring(Tle1ColMeanmotiondt2,
Tle1LenMeanmotiondt2), 2, out _meanMotionDt2);
ExtractExponential(Line1.Substring(Tle1ColMeanmotionddt6,
Tle1LenMeanmotionddt6), out _meanMotionDdt6);
ExtractExponential(Line1.Substring(Tle1ColBstar,
Tle1LenBstar), out _bstar);
ExtractDouble(Line2.Substring(Tle2ColInclination,
Tle2LenInclination), 4, out _inclination);
ExtractDouble(Line2.Substring(Tle2ColRaascendnode,
Tle2LenRaascendnode), 4, out _rightAscendingNode);
ExtractDouble(Line2.Substring(Tle2ColEccentricity,
Tle2LenEccentricity), -1, out _eccentricity);
ExtractDouble(Line2.Substring(Tle2ColArgperigee,
Tle2LenArgperigee), 4, out _argumentPerigee);
ExtractDouble(Line2.Substring(Tle2ColMeananomaly,
Tle2LenMeananomaly), 4, out _meanAnomaly);
ExtractDouble(Line2.Substring(Tle2ColMeanmotion,
Tle2LenMeanmotion), 3, out _meanMotion);
ExtractInteger(Line2.Substring(Tle2ColRevatepoch,
Tle2LenRevatepoch), out _orbitNumber);
if (year < 57)
{
year += 2000;
}
else
{
year += 1900;
}
Epoch = new DateTime((int)year, 1, 1).AddDays(day - 1);
}
