Positioning and Timing Test Campaign Based on China Area Positioning System (CAPS) ZHANG Yang[1,2,3], SU Yu[1,2,3], JING Wenfang[1,2], LU Xiaochun[1,2,3] 1. National Time Service Center, CAS, Xi’an, 710600, China 2. Key Laboratory for Precision Navigation, Positioning and Timing of the CAS, Xi’an, 710600, China 3. University of Chinese Academy of Sciences, Beijing Corresponding: Yang Zhang;
[email protected] Abstract: With high performance ground atomic clock and satellite retransferring feature, CAPS achieved higher positioning and timing precision than traditional GNSS. Positioning and timing high-performance verification test has been conducted by National Time Service Center (NTSC in Xi’an, China) in Xi’an city Shaanxi province. Test results show that, (1) the accuracy of the code phase timing and the carrier phase timing with single GEO satellite are better than 5 ns and 0.5ns, respectively; (2) the accuracy of the code phase positioning and the carrier phase positioning with 1 IGSO and 3 GEO satellites are better than 1.5 meters and 0.5 meters respectively. The results indicate the ability of high-precision positioning and timing of CAPS. Keywords: China Area Positioning System (CAPS), positioning and timing, test campaign 1. Introduction With the development of science and technology, many fields need more accurate real-time positioning and timing service, such as space target interception and strike need nanoseconds level timing and decimeter level positioning accuracy. Traditional GNSS can not meet the requirement. With C-band radio frequency, China Area Positioning System (CAPS), a novel regional satellite navigation system proposed by Chinese Academy of Sciences (CAS), can provide the high- performance positioning and timing service based on carrier phase.