... The pointing errors for 2004,2005,2006 (.ps) ( .pdf ): . The 1az and sin(za) fits to the pointing errors (.ps) ( .pdf ): . ... If the jack position changes (since the model was made) because of the resetting of the encoder, you will see a 1 azimuth term in the pointing errors (with the maximum or minimum aligned with the tiedown azimuth). ... Middle Az errors (1azfit) : The constant and sin(za) terms were removed from the data points and then plotted along with the 1 az fit in azimuth. ...