The cysgp4 package is a Cython-powered wrapper of the sgp4lib C++ library (by Daniel Warner) to compute satellite positions from two-line elements (TLE).

It provides similar functionality as the well-known sgp4 Python package (by Brandon Rhodes). In contrast to sgp4, cysgp4 can work well with arrays of TLEs and/or observing times and makes use of multi-core platforms (via OpenMP) to improve processing times.