Gregorian dome wheel bearings break. 1603 points were used for the model. Input data to model The data for the model is taken with the previous model11 in place. Figures 1-4 show these errors. Figures 5 and 6 remove the model 11 correction and show the raw telescope pointing error.
All errors are great circle arc seconds.
1 is the azimuth zenith angle coverage for the input data. This is relative to model 11. 3 plots the same model 11 errors versus zenith angle. 4 is the magnitude of these errors plotted versus azimuth, za. 1 tick mark is 10 arc seconds.