Experiments Research on Orientation Determination by Twin-Star System

Based on the previous work on AR （Ambiguity Resolution） method study and precision simulation analysis, a two-antenna 2.55 m-long baseline orientation prototype system is constructed using Twin-Star system, performed much static and dynamic experiments on it through orientation determination software developed by the author independently, and made precision analysis such as static relative precision, absolute azimuth accuracy, and dynamic azimuth stability. By experiments data processing, the paper has the results to show the feasibility of AR methods by static base rotation baseline and equivalent rotation baseline method developed by the author for vehicle dynamic environments, and the prototype has the following precision parameters： the relative precision better than 0.016 27° in azimuth, 0.012 97° in elevation, the absolute azimuth accuracy better than 0.35895°, and the dynamic azimuth stability better than 0.086 02°. The results also show that in real applications the Twin-Star orienting could provide precise azimuth information. This technology will widen the current function scope of ＂Beidou＂ Satellite System and has important application significance in military and civil background.