The Jovian system has long attracted the interest of human exploration. However, Jupiter and its four Galilean moons form a unique and complex multi-body dynamical environment that greatly challenges trajectory design and optimization.
Moreover, the extremely strong radiation environment of Jupiter and the low available fuel of spacecraft further increase the difficulty of trajectory design. In order to satisfy the requirements of diverse missions of the Jovian system exploration, develop new mission concepts, and obtain higher merit with lower cost, a variety of theories and methodologies of trajectory design and optimization were proposed or developed in the past two decades.
As for multiple-satellite-aided capture through flybys of two or more Galilean moons, the techniques of a phase angle analysis based on the Laplace resonance and the near-resonance of Callisto and Ganymede are proposed to find triple- and quadruple-satellite-aided capture sequences are studied by Lynam et al.
The first case only focuses on the trajectories in the Jupiter system while the second case integrates the heliocentric interplanetary transfers with satellite-aided captures. Various methods for design and optimization are developed, taking different dynamics into consideration. Although the two-body techniques are convenient, they do not fully utilize the natural dynamics of the Jupiter-moon system and have limitations in application. Therefore, a series of techniques have been developed for three-body trajectory design. Tisserand–Poincaré graph, Flyby map, and Tisserand-leveraging transfer are developed in a gradual way, for designing low-Δv orbit transfers in CRTBP.
As for the optimization, the deterministic optimization of a tour mission includes two parts: the flyby sequence optimization that requires broad search and impulsive and continuous trajectory optimization with a given flyby sequence. However, in an actual mission, there are many uncertainties such as model uncertainties, navigation errors, orbital maneuver errors, etc., thus robust design of trajectories before launch is necessary.Third, authors review Jupiter global mapping trajectories.
Indonesia Berita Terbaru, Indonesia Berita utama
Similar News:Anda juga dapat membaca berita serupa dengan ini yang kami kumpulkan dari sumber berita lain.
Scientists say deepening Arctic snowpack drives greenhouse gas emissionsHuman-caused climate change is shortening the snow cover period in the Arctic. But according to new research led by Earth system scientists at the University of California, Irvine, some parts of the Arctic are getting deeper snowpack than normal, and that deep snow is driving the thawing of long-frozen permafrost carbon reserves and leading to increased emissions of greenhouse gases like carbon dioxide and methane.
Baca lebih lajut »
Scientists reveal how sensory protein changes shape with nanometer resolutionThe ability to sense mechanical stimuli, like touch or blood pressure, is essential to physiological processes in humans and across the animal kingdom. In a new study, Scripps Research scientists show how the sensory ion channel PIEZO1 changes shape in response to mechanical stimuli, revealing critical information about how this protein functions.
Baca lebih lajut »
Harrison Ford Reacts In Bizarre Fashion As Scientists Name Third Animal After HimThe snake is named Tachymenoides harrisonfordi.
Baca lebih lajut »
Scientists find nine kinds of microplastics in human heartsThe researchers analyzed the heart tissues of 15 people before and after they underwent heart surgery.
Baca lebih lajut »
Scientists are pulling back from Twitter and looking for alternativesMore than half of researchers who use Twitter report they’ve reduced the amount of time they spend there or have left altogether, according to a survey of thousands of scientists conducted by Nature..
Baca lebih lajut »