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true anomaly function given eccentricity vector, position vector, velocity in JavaScript

JavaScript

​x
 
function trueAnomaly(eccentricity, position, velocity) {
    var h = crossProduct(position, velocity);
    var n = crossProduct([0, 0, 1], h);
    var e = crossProduct(velocity, h) / mu - unitVector(position);
​
    var E = Math.atan2(dotProduct(n, e), dotProduct(e, eccentricity));
​
    if (E < 0) {
        E += 2 * Math.PI;
    }
​
    return E;
}

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true anomaly function given eccentricity vector, position vector, velocity in JavaScript

JavaScript

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