AA3C's VHF/UHF/SHF Radio Horizon Radius Calculator

Feet  or   Meters

Please do not use commas in the numeric input.  Altitude of space object (satellite, ISS, etc.) [Above Sea Level] 
 Altitude of your EARTH STATION antenna location [Above Sea Level]

   

 Miles  or Kilometers

For the orbital space object, the Radio Horizon (radius on earth) is: 
For the orbital space object,the Radio Horizon (DIAMETER on earth)is: 
For the EARTH STATION QTH,  a normal earth Radio Horizon (radius) is: 
For the EARTH STATION QTH,a normal earth Radio Horizon (DIAMETER) is: 

AA3C notes: If one or both entrees are blank and the button "CALCULATE"
is clicked the standard Javascript code "NaN"(Not-a-Number) with 
Miles or Km will be displayed. Entering a negative value, using commas
 or an alphabetic character may also result in a Javascript NaN error
 or some other error code.
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AA3C's Radio Horizon Radius Calculator
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Designed 1/3/2011 by AA3C