SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

Page: 25 / 232

TeraScan 1.5m Polar Satellite Tracking Antenna O & M Manual
9
1.6.2.3.2 1.5m (Model 6003L) Antenna Tracking Positioner
1.6.2.4 Dish Specifications
Axis Velocity 10.5 degrees/second tracking (azimuth and cross-level)
5.2 degrees/second targeting (azimuth)
1.75 degrees/second (elevation)
Acceleration 2.8 degrees/second/second
Drive Motor Type Closed-loop DC brushless torque motors
Drive Motor Torque 0.17 N-m (24 oz-in) maximum [size 23 single-stack]
Number of Axes Three (azimuth, cross-level, elevation)
Azimuth travel limits 540 degrees (95-625 degrees absolute)
Cross-level travel limits -20 to +20 degrees
Elevation travel limits 0–90 degrees
Data servo accuracy 0.5 degrees
Position measurement—azimuth Az Pot. Accuracy: 0.36 degrees
Position measurement-—elevation Fluidic tilt sensor. Accuracy: 0.5 degrees
Limit switches Pedestal controller software
Dish Size Diameter Focal Distance F/D Gain Efficiency
1.5m solid composite
dish, depth=9.11"
1.5m (60") 574mm (22.60") 0.390 25.9 dBic @ 1700 MHz 65%
1.5m solid composite
dish, depth=9.45"
1.5m (60") 553mm (21.79") 0.379 25.9 dBic @ 1700 MHz 65%