Radio wave based localization of a rover for a small planetary body

Investigation of small planetary bodies is now attracted and some missions on asteroids and comets have been realized. Such bodies are full of geographical features that next demand would be direct surface investigation by a rover. In order to navigate the rover to the specific points, the localization of the rover is required. However, conventional localization method is not adequate on small bodies whose size is less than 1[km]. One of the conventional methods, localization by camera images obtained on the rover needs a map made by a mother spacecraft. The resolution of the map is not enough for the rover's local view. Another method, localization by observing the movements of stars and the sun has little accuracy. Global positioning system (GPS) is not practical for small planetary bodies because it needs several orbiters. In this paper, we propose a reasonable method which localizes the rover on a small body with reasonable accuracy, with reasonable time and with reasonable resource. This method measures two way range between a rover and a mother spacecraft repeatedly. Even this method uses only one orbiter, the localization accuracy is estimated about 1[m] assuming ITOKAWA-size asteroidwhoseradiusisatmost600[m].

[1]  Takashi Kubota,et al.  Micro-hopping robot for asteroid exploration , 2003 .

[2]  Mohinder S. Grewal,et al.  Global Positioning Systems, Inertial Navigation, and Integration , 2000 .

[3]  Sebastian Thrun,et al.  Probabilistic robotics , 2002, CACM.

[4]  Robert Grover Brown,et al.  Introduction to random signals and applied Kalman filtering : with MATLAB exercises and solutions , 1996 .

[5]  J. Terazono,et al.  Detailed Images of Asteroid 25143 Itokawa from Hayabusa , 2006, Science.

[6]  J. Kawaguchi,et al.  The Rubble-Pile Asteroid Itokawa as Observed by Hayabusa , 2006, Science.

[7]  Akiko M. Nakamura,et al.  Asteroidal surface studies by laboratory light scattering and LIDAR on HAYABUSA , 2006 .

[8]  Takahide Mizuno,et al.  Mass and Local Topography Measurements of Itokawa by Hayabusa , 2006, Science.

[9]  I. Nakatani,et al.  Sensitivity analysis and influence discussion of estimation errors in rotation parameters in localization of rovers on small planetary bodies with single source of radio waves , 2008, 2008 SICE Annual Conference.

[10]  John Weston,et al.  Strapdown Inertial Navigation Technology, Second Edition , 2005 .

[11]  Akira Fujiwara,et al.  Pole and Global Shape of 25143 Itokawa , 2006, Science.

[12]  Yan Xu,et al.  GPS: Theory, Algorithms and Applications , 2003 .

[13]  Rob Lemmens,et al.  GPS, Theory, Algorithms and Applications: Guochang Xu, Springer-Verlag, 2003, 340 pp., Price €89.95, Hardcover, ISBN 3-540-67812-3 , 2004 .