Adaptive algorithms of antenna arrays usually focus on the optimal performance under stable conditions. If GNSS receivers are mounted on moving subjects (such as bombards, aircrafts, vehicles or ships), the movement or turbulence of the platform can make the “null” direction mismatch the interferer direction. The current researchis paper firstly establisheds an array signal model under platform motion, which wais classified into two types: the first motion type (high frequency turbulence) and the second motion type (stable tilting), Then it developeds the analytic formula of array output Signal-to-Interference-plus-Noise ratio (SINR) under two types of motion models. Simulation results show that the array output SINR is more sensitive to the arriving angle of the interferer than to its power, which is because the antenna usually forms narrow and deep nulls. For a 7-element antenna array with one element at center and other elements in a circle around the center, when the arriving angle of the interferer changes by 3 degrees, the loss of SINR reaches 3.3 dB. Improving weight updating rates and widening the null width are both effective means in improving the robustness of the anti-jamming antenna arrays.