A new scheme was proposed in this study to account for such a handicap

which is based on the statistics of object area fraction that is somewhat insensitive to the orbit truncation.In order to get a measurement that could be accurately received

continuous circle object was consulted.Accordingly the equivalent radius was finally defined by using a minimum deviation principle to indicate the object scale.Since the equivalent radius is an indirect indicator of object spatial scale

it could be used as a secondary strategy to modify the results from counting method

by which the underestimate would be restrained to some extent.