# Tag Info

The article Format of the JPL Ephemeris Files has a detailed breakdown of how to use the Development Ephemeris including an example walkthrough and example source code. I think you have a lot of superfluous information, all you really need is: $$\sum_{i=1}^{n}a_i T_i(x)$$ Where $a_i$ are the coefficients, $x$ is the time variable normalized to the interval ...