Servo System for GMRT Antenna

GMRT Servo Specifications
Dish MountAlt-Azimuth mount
Dish Movement+/- 270 Deg. in Azimuth Axis
15 Deg. to 110 Deg. in Elevation Axis
Dish Speed30 Deg/min in Azimuth Axis
20 Deg/min in Elevation Axis
Tracking Speed min. 5 arcmin/min in both axis
Tracking Speed max. 150 arcmin/min in Azimuth axis
15 arcmin/min in Elevation axis
Pointing Accuracy 1 arcmin rms for wind speed < 20 Kmph
Few arcmin for wind speed > 20 Kmph
Gear Reduction Ratio 18963 in Azimuth
25162 in Elevation
Design wind speed Operation upto 40 kmph
Slew upto 80 kmph
Survival wind speed 133 kmph
Operating voltage415 VAC, 3 phase, 50 Hz