“…where ∆ϕ is the sum phase of three parts: Displacement, with which are are concerned; atmosphere, which, for a small area, can be eliminated from surrounding stable points; and the Remote Sens. 2019, 11, 2887 4 of 17 thermal/environmental noise practically, which is removed by selected points with high signal to noise ratio (SNR) [11,15,35]. Except for the lack of SAR capability, GB-RAR, like IBIS-S, shares the same range imaging and interferometry techniques with the above-mentioned GB-SAR.…”