Example CCE worldtube input data

<p>This is an example worldtube file for evaluating the installation and functionality of a Cauchy Characteristic extraction scheme for waveform extraction from finite-radius GR simulation. This file was generated by a SpEC run of an equal-mass non-spinning binary black hole simulation by Mark Scheel.&nbsp; The techniques used to simulate the binary black hole system are similar to those used in <a href="https://arxiv.org/pdf/1904.04831.pdf">Boyle et. al. 2019</a>, in particular the GR simulation techniques published in <a href="https://arxiv.org/abs/gr-qc/0512093">Lindblom et. al. 2006</a>.&nbsp; This is a suitable input file for instance, for SpECTRE or SpEC CCE systems.</p>