In additive non-Gaussian clutter modeled as a spherically invariant random vector (SIRV)

a novel detector is designed for range-spread target.Moreover

the parameters for this detector are derived simply.The formulas relating the false alarm probability to the detection thresholds are also deduced

which show the constant false alarm rate (CFAR) properties.The experimental results show that

with proper parameters

the proposed detector performs much better than two existing range-spread target detectors.It is shown that as the number of sensors

the number of target scatterers or the clutter spikiness increases

its performance improves.In addition

the dirived detector is robust to the third thresholds and correlations of clutter.