The Hankel probability distribution. The distribution for the product of two exponentially distributed random variables
Abstract
For the purpose of calculating the probability distribution of a skywave sea echo, the process is modeled as the product of two independent exponentiallydistributed random variables. Because the resulting probability distribution involves the Hankel function, it is tentatively named the Hankel probability distribution. The Hankel distribution is compared with the measured distribution for skywave backscatter from the sea and reasonable agreement was achieved. It is believed that an exponential distribution is a reasonable approximation to the distribution function for ionospheric reflection. This same analysis applies to skywave backscatter from the ground.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 August 1981
 Bibcode:
 1981STIN...8231615J
 Keywords:

 Backscattering;
 Hankel Functions;
 Probability Distribution Functions;
 Random Variables;
 Sky Waves;
 Computation;
 Exponential Functions;
 Ionospheric Propagation;
 Ocean Surface;
 Communications and Radar