| The CORNISH survey has used the VLA to map 110 square degrees of the northern inner Galactic plane in the 5 GHz coninuum with 1 arcsecond resolution. |
| This rotation was accomplished with a closed-loop motion control system that had a repeatability of approximately one arcsecond. |
| Seemingly plausible surface geometry can lead to situations where the two definitions of angle differ by as much as a few tenths of an arcsecond. |
| Our measurements have a precision of 27 millionths of an arcsecond per year. |
| Further, deposition uniformity was greatly improved with crystal quality distributions being reduced closer to the 55 arcsecond X-Ray rocking curve width previously reported. |
| The nondispersivity condition therefore requires the sample to be aligned with arcsecond precision. |
