Influence of interplanetary trajectory selection on Mars atmosphericentry velocity
| Autor: | Richard W. Powell, Robert D. Braun, Wallace T. Fowler, Scott A. Striepe |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Physics
biology business.industry Aerospace Engineering Venus Parking orbit Mars Exploration Program Atmosphere of Mars biology.organism_classification Exploration of Mars Aerobraking Astrobiology Space and Planetary Science Atmospheric entry Aerospace engineering business Interplanetary spaceflight |
| Zdroj: | Journal of Spacecraft and Rockets. 30:426-430 |
| ISSN: | 1533-6794 0022-4650 |
| DOI: | 10.2514/3.25548 |
| Popis: | Many current manned Mars mission studies are using low lift-to-drag ratio (L/D) vehicles to aerobrake at both Mars and Earth. The use of these low L/D vehicles could limit the allowable velocity at the atmospheric interface. This paper will demonstrate that if entry velocity constraints are incorporated into the interplanetary analysis of aerobraking Mars missions, many opportunities can be achieved for a small increase in initial mass in low-Earth orbit (IMLEO). These opportunities result from varying the initial launch date and the encounter dates and possibly using a powered Venus swingby on either the inbound or outbound transfer. This paper demonstrates this technique by using three atmospheric entry velocity ranges at Mars arrival (6.0-8.5, 6.4-8.1, and 7.2-7.3 km/s), unconstrained Mars entry velocities, and an Earth return entry velocity below 14 km/s. The results indicate that, by carefully selecting the interplanetary trajectory, an optimum IMLEO mission can be found for even highly restrictive entry velocity missions in practically all of the 15 yr studied. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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