Error Reduction in Numerical Relativity Calculations Using Local Coordinates

In simulations of binary black hole systems, errors in the local calculations are determined in part by the coordinate system in which they are performed. Calculating the field quantities in coordinate systems matched to the local dynamics of each portion of the simulation grid promises to reduce this local error. I will talk about my implementation of this technique in our numerical relativity code, HAHNDOL, and its potential to improve the accuracy and efficiency of our simulations and allow us to perform more ambitious simulations.