Measuring Track-Related Pointing Errors on the Nanshan Radio Telescope with an Optical Pointing Telescope

Table 4

n = 2 spatial frequency-related parameters.

Pointing parameter	Radio model (′′)	OPT model (′′)	Measured twist (′′)	Model predicted twist (′′)
P17	−5.27	−4.92	−0.35	−0.52
P18	−8.23	−4.68	−3.55	−4.56