Method for building indoor assessment system for airborne DGPS efficiency

In order to resolve the problem that the airborne differential global positioning system (DGPS) efficiency cannot be measured and assessed in the whole high dynamic hardware-in-loop (HIL) simulation of aircraft indoors, but only can be simulated partly or test-fly outdoors, a system how to evaluate the whole dynamic DGPS adapting real-time kinematic (RTK) in the static HIL simulation condition is brought forward on the basis of real-time simulation technology by adopting a GPS simulator and a DGPS receiver. The test data in the two different modes have been achieved by using the assessment system. The results show that the position precision of DGPS is 4~5 times higher than that of the single GPS. The system can simulate the whole outdoor fly-test condition of the airborne DGPS and realize assessments for airborne DGPS efficiency in the static laboratory. The method proves to be effective in practice and provides a kind of indoor evaluation system for airborne DGPS efficiency in future.