Transmitted Reflected Shadow Boundary传输反射阴影的边界 Time Reference Scanning Beam (microwave landing system)一次扫描波束(微波着陆参考系统) time-reversal symmetry breaking逆时破坏对称 Triple Ratio Switch Balun平衡-不平衡变压器三比开关 Time Reference Scanning Base时间参考。扫描