针对传统着陆引导设备机动性能差而较难满足应急保障需求的问题，结合飞机进近着陆阶段对导航参数需求的特点，研究了基于DGPS/SINS紧组合的连续导航保障方案。卫星信号良好的情况下，通过建立差分基准站并将基准站的伪距等观测数据传输到流动站，在接收终端进行DGPS和GPS/SINS紧组合算法的处理；卫星信号丢失情况下，将SINS输出的速度信息作为观测量，进行载体相对位置的航路推算，可以获得飞机着陆阶段所需要的导航参数。实验结果表明，该方法可以有效获取飞机进近着陆阶段连续的具有较高精度的相对位置、速度和姿态参数，具有一定的实用价值。

Traditional approach and landing guidance equipments are difficult to meet the urgent needs due to their poor flexibility.Thereforewe studied the continuous navigation project based on DGPS/SINS tight integration according to airplanes requirement to the navigation parameters in the process of approach and landing.In the condition of good GPS signalthrough building up difference base station and transmitting observation data such as pseudorange to rover stationthe DGPS and GPS/SINS tight integration algorithm was processed in receiver terminal.In the case of no satellite signalthe velocity information from SINS was used as observation for dead reckoning the relative positionand the navigation parameters needed for landing were acquired.The experiment results indicate that this method can obtain continuous relative positionvelocity and attitude with high accuracy for airplane approach and landingwhich is useful for practical application.