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package org.madore.ephem;
import java.util.List;
import java.util.ArrayList;
import java.util.EnumMap;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
public final class Smart97 {
public static enum Variable {
PSI("psi"), OMEGA("omega"), PHI("phi"),
P("p"), EPSILON("epsilon"), CHI("chi"), SIDTIME("sidtime");
final String name;
Variable(String name) { this.name = name; }
}
// The argument is in Julian millennia (value is in radians).
public static Comput.Polynomial[] lambdas = new Comput.Polynomial[] {
new Comput.Polynomial(4.40260867435, 26088.1469432237), // Mercury
new Comput.Polynomial(3.17614652884, 10213.5293478605), // Venus
new Comput.Polynomial(1.75347029148, 6283.3196527950), // Earth
new Comput.Polynomial(6.20347594486, 3340.8562283493), // Mars
new Comput.Polynomial(0.59954632934, 529.9347667441), // Jupiter
new Comput.Polynomial(0.87401658845, 213.5428970875), // Saturn
new Comput.Polynomial(5.48129370354, 75.0254002168), // Uranus
new Comput.Polynomial(5.31188611871, 38.3768372873), // Neptune
new Comput.Polynomial(5.19846640063, 77713.7714481804), // Delaunay D
new Comput.Polynomial(1.62790513602, 84334.6615717837), // Delaunay F
new Comput.Polynomial(2.35555563875, 83286.9142477147), // Delaunay l
new Comput.Polynomial(4.89496121282, 2301216.7536515365), // phi
};
private static EnumMap<Variable, Comput.SumPoisson2Terms> data = new EnumMap<Variable, Comput.SumPoisson2Terms>(Variable.class);
public static Comput.SumPoisson2Terms getFunc(Variable v) {
if ( ! data.containsKey(v) ) {
List<Comput.Poisson2Term> series = new ArrayList<Comput.Poisson2Term>();
try {
InputStream str = Smart97.class.getResourceAsStream("smart97.dat");
BufferedReader in = new BufferedReader(new InputStreamReader(str, "utf-8"));
String s;
while ( ( s = in.readLine() ) != null ) {
String[] fields = s.split("\t");
if ( ! fields[1].equals(v.name) )
continue;
int deg = Integer.parseInt(fields[2]);
String[] subfields = fields[3].split(",");
double[] om = new double[12];
for ( int j=0 ; j<12 ; j++ )
om[j] = Double.parseDouble(subfields[j]);
double b = Double.parseDouble(fields[4]);
double a = Double.parseDouble(fields[5]);
series.add(Comput.Poisson2Term.ab(deg, a, b, om, lambdas));
}
} catch ( Exception e ) {
throw new RuntimeException(e);
}
data.put(v, new Comput.SumPoisson2Terms(series));
}
return data.get(v);
}
}
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