In recent years, USA, Russia and China have carried out many sea launch and recovery experiments, sea launch site exhibits better safety and economical efficiency compared with land launch site, which can provide launch service for spacecraft with different orbits. GNSS/INS integrated navigation system is adopted by rockets to acquire positioning results, nevertheless, owing to the inherit vulnerability of GNSS and possible INS failure, other navigation system is required to offer independent multi-source positioning data. TDOA positioning system is able to calculate rocket’s position utilizing time measurement data from telemetering signals, on one hand, the reliability can be promoted, and on the other hand, real-time central monitoring can be achieved, which aroused an increasing number of interests. However, present TDOA system usually apply land stations to obtain time measurements and localization results, because the characteristics of flat station distribution along the vertical direction, the vertical positioning precision cannot be satisfactory, especially for the need of rocket recovery on the sea launch site. To solve this problem, this work first discusses the precision influence of different surveying ships distribution layouts, “T” shape distribution is recommended for surveying ships according to evaluation results, then introduces air-based surveying station into TDOA positioning system to improve vertical localization accuracy, probes the performance variation utilizing different UAVs, including tethered UAV, multi-rotor UAV, medium-scale vertical takeoff and landing fixed wing UAV and large-scale fixed wing UAV, confirms the optimal UAV height in the rocket recovery key area under 10 km height, then researches on surveying station optimal distribution layout strategy according to predefined trajectory. This work can enhance the positioning precision and reliability, and provide three-dimensional surveying station distribution guidance in sea launch site.
Three-Dimensional Station Distribution Design for TDOA Positioning System of Sea Launch Site
Lect. Notes Electrical Eng.
China Satellite Navigation Conference ; 2024 ; Jinan, China May 24, 2024 - May 26, 2024
China Satellite Navigation Conference (CSNC 2024) Proceedings ; Kapitel : 30 ; 346-357
2023-11-02
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Rocket sea launch , TDOA positioning , Three-dimensional station distribution , Positioning precision evaluation , Air-based survey station Engineering , Communications Engineering, Networks , Signal, Image and Speech Processing , Aerospace Technology and Astronautics , Control, Robotics, Mechatronics , Computer Applications , Geography, general
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