a mission to sun-earth triangular libration point for weather forecast
- Paper number
IAC-18,A7,2,1,x44290
- Author
Ms. Ying WANG, China, Chinese Society of Astronautics (CSA)
- Coauthor
Prof. Shuwu Dai, China, CSSAR/CAS
- Coauthor
Dr. Wenyan Zhou, China, China Academy of Space Technology (CAST)
- Coauthor
Mr. Jian-zhao Wang, China, China Academy of Space Technology (CAST)
- Coauthor
Prof. Qiu-gang Zong, China, Chinese Society of Astronautics (CSA)
- Year
2018
- Abstract
Coronal mass ejections (CMEs) create major disturbances in the interplanetary medium, and trigger severe magnetic storms while colliding with Earth. Large geomagnetic storms can cause electrical power outages and damage communication satellites. STEREO mission for the first time helps scientists fully understand their origin and evolution. But STEREO's angle with the Sun-Earth line is changing constantly, so only a limited number of Earth-directed CMEs were observed in profile. A L5 mission will provides the most suitable perspective view of the Sun–Earth system which is believed to an ideal platform for early stage CMEs detection and Corotating Interaction Regions (CIRs) observation, and provide advanced warning. In addition, L5 is a very attractive point for in-situ scientific measurements that can clarify some of the unknown questions about CMEs and CIRs. The Solar-Terrestrial Relationship And Space Weather Investigation mission（STRASWI）is a proposed mission to be deployed at the Sun-Earth L4 or L5, which would unprecedentedly track the disturbances propagating towards the Earth with high accuracy. Therefore,it allows scientists to further understand the CMEs structure and role in interplanetary science. STRASWI provides up to 5 days of advanced warning of solar storms before hitting the earth. In addition to studying above, this mission will allow searching for Earth Trojan Asteroid that may be located at the Sun-Earth triangular points. With a series of studies, we indicate that such a mission is in fact feasible. This paper describes the science objects and requirements for STRASWI，and mission design including optimization for both the transfer trajectory and the Trojan orbit around L5, configuration analysis of payload to accommodate spacecraft bus，platform resolution such as the effective propulsion system，the precise altitude control，the high capacity communications etc. .finally，we will for the first time attempt to launch three explorers flying to L3,L4and L5 separately with one launcher to achieve tridimensional measurement，and try the feasibility of searching for Earth Trojan Asteroid .
- Abstract document
- Manuscript document
IAC-18,A7,2,1,x44290.pdf (🔒 authorized access only).
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