Abstract Mission analysis using aerogravity-assist (AGA) maneuver at Titan is presented in this paper. Considering Saturn arrival, Titan encounter, and different post-AGA orbits, the analysis uses vector diagrams to illustrate the relations among all conditions as well as design constraints. The analysis focuses on Enceladus mission concept and also present a summary result for Cassini-type Saturn system missions. Turn angles using AGA maneuver at Titan are quantified via numerical simulation, showing that 25-deg AGA turn angles are achievable with a Titan inbound excess velocity () of 10–20 km/s. Results show that for an Enceladus mission, of 10 km/s is the minimum velocity required for AGA maneuver to achieve an outbound transfer orbit directly to Enceladus; the corresponding peak g-load is less than 6 g, peak heat rate less than 200 W/cm2, and total heat load of around 25 kJ/cm2. For a Cassini-type Saturn mission, a minimum of 5 km/s can be used for Titan AGA. The results showed are for of 6 km/s; and the corresponding peak g-load, peak heat rate, and total heat load are 1.5 g, 20 W/cm2, and 5 kJ/cm2 respectively.
Highlights Design space for Saturn system missions using Titan aerogravity-assist is fully explored. A novel method combining graphic approach using vector diagrams and numerical simulation is presented. Readiness of entry vehicles and TPS technologies for using Titan aerogravity-assist maneuver is evaluated.
Titan aerogravity-assist maneuvers for Saturn/Enceladus missions
Acta Astronautica ; 176 ; 262-275
2020-06-01
14 pages
Article (Journal)
Electronic Resource
English
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