On the deep space port utilization constructed around L2 for outer solar system transportation

The human activities in the solar system exploration will expand to the outer solar system such as the Jupiter and the Saturn and so on in future. The Earth lies at the bottom of the gravity potential and the departure toward the planetary flight directly from the Low Earth Orbit (LEO) may not be appropriate. The journey assuming the reusable spaceships for the interplanetary cruise inevitably will utilize the high efficiency propulsion elements represented by the Ion propulsion that may be driven by the nuclear power or solar electric power units. Those propelled by the low thrust propulsion may well depart and return to the appropriate home ports or the quay that is at higher gravity potential so that the cruise can commence directly from the home position. The paper extends the previous idea shown last year. The home ports here are assumed located at the L2 point or in the vicinity in Sun-Earth system. Here is shown the round trip flight examples to the cyclic routine flights between the Jupiter and the home port. Especially the Circum-Jupiter Cyclic flight paths are studied not only in the ballistic way but in the Electric Delta-V Earth Gravity Assist manner. The paper at the same time refers to the infra structure that supports this deep space flights. The paper presents the commuter shuttle traffic system between the LEO and the home ports. copyright