tailieunhanh - Aerospace Technologies Advancements Fig Part 8

Tham khảo tài liệu 'aerospace technologies advancements fig part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 230 Aerospace Technologies Advancements Fig. 10. Power profile for the Dawn mission Oh 2007 . Fig. 11. Mass and cost comparison for the Dawn mission Reference . The extreme example of a multiple target mission would be a Super-Dawn. A SuperDawn class mission is the concept of traveling to and stopping at several high interest targets with a single launch. The throughput potential of both NEXT and HiVHAC greatly opens up the trade space of achievable multi-rendezvous options. Unfortunately most high interest targets are not necessarily co-located to allow for short transfers due to variances in inclination eccentricity period etc. Sufficient throughput capability and creative mission planning could allow missions to visit multiple high interest targets and gain information from several secondary near-by targets. Low-thrust Propulsion Technologies Mission Design and Application 231 The targets for a hypothetical Super-Dawn mission were chosen from a list of high interest targets formulated by the scientific community. Based on preliminary analysis of throughput requirements and delivered mass a single spacecraft with only a 5-kW array could be used to rendezvous with four high interest near-Earth targets shown in table 1. The final delivered mass is comparable to the Dawn spacecraft. The Super-Dawn mission illustrates the tremendous potential of electric propulsion for these types of missions. Studies have looked at using a single spacecraft for tours of near-Earth objects main-belt asteroids and even Jupiter Trojans. Sample return missions are multi-body missions because they need to return to Earth. Sample return missions are often considered high priority because of the higher fidelity science that can be performed terrestrially. Mars sample return was under investigation for many years but the large costs of such a mission has deterred its implementation. Regolith from Phobos and Deimos are of high scientific value. The mission options offer significantly lower .