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TLE with zero eccentricity from `propagate` crashes other programs
:lady_beetle: Problem
TLEs produced with propagate will have the eccentricity set to zero. This will crash some tools when loading the TLE, e.g. "Orbitron".
:bulb: Possible solutions
- Store the eccentricity set in the old TLE before propagation and set it again before writing the new TLE.
- Set a very small default eccentricity. The smallest encodable positive eccentricity is
0000001/ 1e-7 °.