13 | 13 | The astrodynamics calculations are all implemented as static functions in the SGP4 class/module. The ElsetRec datastructure is used to maintain initialization state across those methods. For convenience, I have implemented the TLE class. The constructor accepts the two lines of the the two-line element set as arguments. To then propagate (simulate) the orbit, I have implemented a few getRV methods in each language. One will accept the number of minutes since the epoch as an argument. In most languages, I've also implemented a version of getRV that accepts a Date or DateTime object to simulate the orbit at a specific point in time. Sometimes, if I didn't find a helper class in the target language that I liked, I simply used the number of milliseconds since January 1, 1970 as the argument. |