Abstract
The writers have measured the reflected-power from various vessels. They could decide the values of two constants from these data. These two constants are the effective area σ and the effective height H_e, which are closely related with the reflective characteristic of the target and important for the design of the reflector to improve the reflected-power and to extend the maximum search-distance. They explained moreover about the test to measure the reflected-power from simple target on the ground.
