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Horizon Peak Radio Signal Over-Shoot    
Distance To The Horizon - Distance to 1st. and 2nd. Nulls    
*Input Antenna height:    HAAT  Input (M)eters or (F)eet:     
Input Number of bays:   Input Spacing between bays:     
Input Station frequency:   MHz.          90% Elevation Tilt
                          **Elevation Gain:   x Tower Height in Feet (HAAT)              
***Vertical Angle of 1st. Null:   º Miles to 1st. Null                  
***Vertical Angle of 2nd. Null:   º Miles to 2nd. Null                  
Distance to Radio Horizon is:   Miles  Kilometers                  
Distance to Optical Horizon is:   Miles Kilometers                  
Minimum Beamwidth is:   º                      
Maximum Beamwidth is:   º  At first null                  
Center of top bay at:   ft.approx. Meters                  
Center of bottom bay at:   ft.approx. Meters      
Center top to Center bottom bay:   ft.approx. Meters      
Overall Space Required on tower:   ft.approx.Allow clearance above and below array Bay Spacing:  
    1.0 λ    
    0.926 λ  
  Check with consultant to see if beam tilt is needed   0.80 λ  
            0.75 λ  
*Antenna Height is measured to the center of the antenna     Tilt angles suggested for use with 5 or more bays    0.50 λ  
** Estimated based on number of bays and spacing Based on 4/3 curvature smooth Earth.    
***Estimated based on look up chart; yours may be different Not responsible for errors of any type.      
****Estimated, check with your consultant for actual value Let your consultant guide your choice of beam tilt and/or null fill  
  Input height, bays, frequency, M or F and bay spacing Meters  
  Meters or Feet choice is a mouse pull down    
  Bay Spacing choice is a mouse pull down    
  Calculations / answers are in Blue & White    
  Drawings copyright BobGroome April 12, 2013      

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