Wind Loads; Shipboard Equipment Operating Limits - SeaSpace TeraScan 1.5M Operation And Maintenance Manual

1.6.1.2 Wind Loads

Antenna
Wind Loads at 68 m/s (242 km/hr) (150 mph) (131 knots)
1.5m (60") dish
1.82m (73") radome
1.5m (60") dish
2.0m (79") radome

1.6.1.3 Shipboard Equipment Operating Limits

Vibration Withstand externally imposed vibrations in two horizontal directions and in the vertical
direction, at sweep rates no greater than 0.2 octaves per minute having peak single
amplitudes as follows:
Frequency Range, Hz
Corrosion Parts are corrosion resistant or treated to endure effects of salt air and salt spray. The
equipment is specifically designed and manufactured for marine use.
Ship Motions
Roll: ± 25 degrees with 6 to 12 sec periods
Pitch: ±15 degrees with 6 to 12 sec periods
Yaw: ± 8 degrees with 15 to 20 sec periods
Turning rate: Up to 12 deg/sec
Headway: Up to 50 knots
Mounting height: Up to 150 feet
Vertical
Dead
Load
Radome (Antenna
Weight and
(Empty) Radome)
50 kg 132 kg
(110 lbs) (290 lbs)
90.7 kg 155 kg
(200 lbs) (342 lbs)
Peak Single Amplitude, Inch
4 - 10
10 - 15
15 - 25
25 - 33
Overturning
Moment
Horizontal referred
Wind to bottom
Shear of radome
319 kg 2,847 Nm
(703 lbs) (2,100 ft-lbs)
319 kg 2,847 Nm
(703 lbs) (2,100 ft-lbs)
0.100
0.030
0.016
0.009
TeraScan 1.5m Polar Satellite Tracking Antenna O & M Manual 5
Bolt Torque
1/2": 88-115 Nm
(65-85 ft-lbs)
12mm: 88-115 Nm
(65-85 ft-lbs)