All of the SR spectra were fit in the time domain. In particular, the real and imaginary parts of the corrected asymmetry were simultaneously fit in a rotating reference frame as explained in Chapter 3. The spectra were fit with the following nine variable parameters:
The sum over reciprocal lattice vectors in Eq. (4.13) was carried out by sampling 2814 evenly spaced points in the triangle formed by three adjacent vortices. Significant changes in the fitted parameters was found for sums less than 1626 points, whereas an increase in the sum to 4902 reciprocal lattice points changed the fitted value of by less than .
In all cases the first of the time spectrum were fit. There was essentially no change in the fitted parameters corresponding to the sample signal when the time range was increased to .The raw data was binned so that there were approximately 1200 data points (i.e. 600 in the imaginary part and 600 in the real part of the corrected asymmetry spectrum). Doubling the bin size (to reduce the total number of data points to about 600) did not change the fitted value of and changed the fitted value of by no more than in YBa2Cu3O6.95.