Near Vertical Incidence Skywave

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Enter the Tx co-ordinates along with F2 critical frequency and the height of the F2. These can be found from either of these URL's, UK Solar System Data Centre (registration required) or RAF Fairford (Ionosonde)
 
Input
 
    NB: Use '-' for South/West

 
 
 
 
 
Results
 
Here are the optimum frequency and aerial details for a half wave dipole with a reflector wire mounted 0.15 wavelengths below the main wire.
 
Frequency -
Meters
 
Aerial Length -
Meters
 
Aerial Height -
Meters
 
Aerial reflector (length) -
Meters
 
Take-off angle -
Degrees