The Experts below are selected from a list of 12927 Experts worldwide ranked by ideXlab platform
Yoshitsugu Sone - One of the best experts on this subject based on the ideXlab platform.
-
charge discharge performance of lithium ion secondary cells under microgravity conditions lessons learned from operation of Interplanetary Spacecraft hayabusa
Electrochimica Acta, 2013Co-Authors: Yoshitsugu SoneAbstract:Abstract The Japan Aerospace Exploration Agency (JAXA) is developing a lithium-ion secondary battery for deep space missions. Lithium-ion secondary battery was first used for the Interplanetary Spacecraft, Hayabusa. With a view to future long-term operations on the moon and Interplanetary travel, the in-orbit performance of the lithium-ion battery of Hayabusa was examined. The battery cells maintained a constant performance over 2.7 years of operation as Hayabusa travelled to the asteroid Itokawa. To maintain cell conditions. The state of charge was fixed by using a balance circuit. The cell voltages differed by less than 60 mV during the operation, which is within the error expected based on the circuit design and the telemetry conditions.
-
Charge/discharge performance of lithium-ion secondary cells under microgravity conditions: Lessons learned from operation of Interplanetary Spacecraft Hayabusa
Electrochimica Acta, 2013Co-Authors: Yoshitsugu SoneAbstract:Abstract The Japan Aerospace Exploration Agency (JAXA) is developing a lithium-ion secondary battery for deep space missions. Lithium-ion secondary battery was first used for the Interplanetary Spacecraft, Hayabusa. With a view to future long-term operations on the moon and Interplanetary travel, the in-orbit performance of the lithium-ion battery of Hayabusa was examined. The battery cells maintained a constant performance over 2.7 years of operation as Hayabusa travelled to the asteroid Itokawa. To maintain cell conditions. The state of charge was fixed by using a balance circuit. The cell voltages differed by less than 60 mV during the operation, which is within the error expected based on the circuit design and the telemetry conditions.
-
the performance of the lithium ion secondary cells under micro gravity conditions in orbit operation of the Interplanetary Spacecraft hayabusa
Electrochemistry, 2007Co-Authors: Yoshitsugu Sone, Hiroki Ooto, Masaaki Kubota, Masahiro Yamamoto, Hiroyuki Yoshida, Takashi Eguro, Shigeru Sakai, Teiji Yoshida, Masatoshi Uno, Kazuyuki HiroseAbstract:‘HAYABUSA’ is a Japanese Interplanetary Spacecraft for the exploration of an asteroid named ‘ITOKAWA.’ The Spacecraft is powered by a 13.2 Ah lithium-ion secondary battery. To realize maximum performance of the battery for long flight operation, the state-of-charge (SOC) of the battery was maintained at ca. 65% during storage in case it is required for contingency operations. To maintain this SOC condition, the battery is charged once a week. We further charge the battery up to 4.1 V/cell using bypass circuits to balance the cells every four months. The capacity of the battery was measured during the flight operation, which revealed the appropriate capacity for the expected mission.
-
The Performance of the Lithium-Ion Secondary Cells under Micro-Gravity Conditions—In-Orbit Operation of the Interplanetary Spacecraft ‘HAYABUSA’
Electrochemistry, 2007Co-Authors: Yoshitsugu Sone, Hiroki Ooto, Masaaki Kubota, Masahiro Yamamoto, Hiroyuki Yoshida, Takashi Eguro, Shigeru Sakai, Teiji Yoshida, Masatoshi Uno, Kazuyuki HiroseAbstract:‘HAYABUSA’ is a Japanese Interplanetary Spacecraft for the exploration of an asteroid named ‘ITOKAWA.’ The Spacecraft is powered by a 13.2 Ah lithium-ion secondary battery. To realize maximum performance of the battery for long flight operation, the state-of-charge (SOC) of the battery was maintained at ca. 65% during storage in case it is required for contingency operations. To maintain this SOC condition, the battery is charged once a week. We further charge the battery up to 4.1 V/cell using bypass circuits to balance the cells every four months. The capacity of the battery was measured during the flight operation, which revealed the appropriate capacity for the expected mission.
Nasa - One of the best experts on this subject based on the ideXlab platform.
-
An overview of the Kaliningrad Spaceflight Control Center
2019Co-Authors: NasaAbstract:A general description is given of the Kaliningrad Spaceflight Center near Moscow, where Soviet orbiting and Interplanetary Spacecraft are monitored and controlled. Brief descriptions of the equipment used and the scope of work done at the center are included.
-
Electronic packaging and cabling
2019Co-Authors: NasaAbstract:Testing electrical, mechanical, and handling properties and environmental characteristics of small gage electrical wire for Interplanetary Spacecraft
-
Integrated Manned Interplanetary Spacecraft Concept Definition. Volume 4 - System Definition Final Report
2014Co-Authors: NasaAbstract:Spacecraft, space acceleration system, and earth based support for integrated manned, Interplanetary Spacecraft concepts
-
Summary of mission characteristics, guidance and control system operational sequences, and performance requirements
2011Co-Authors: NasaAbstract:Mission characteristics and guidance system performance for earth orbit and Interplanetary Spacecraft
J. G. Williams - One of the best experts on this subject based on the ideXlab platform.
-
Long-range tests of the equivalence principle
Classical and Quantum Gravity, 2001Co-Authors: J D Anderson, J. G. WilliamsAbstract:The equivalence principle can be tested using accurate tracking of the Moon, planets, and Interplanetary Spacecraft. Tests with solar system bodies probe the dependence of the equivalence principle on self-energy. Analysis of lunar laser ranges yields the difference in the ratio of the gravitational and inertial masses for the Earth and Moon of ({-0.7}?1.5)?10-13. In conjunction with laboratory tests of the equivalence principle and Spacecraft and VLBI tests of PPN ?, one derives |?-1|?0.0005. Planetary tests are feasible, in particular tests using Mars. Improvements in Doppler accuracies under development may allow tests with Interplanetary Spacecraft.
Elizabeth Gibney - One of the best experts on this subject based on the ideXlab platform.
-
How a small Arab nation built a Mars mission from scratch in six years
Nature, 2020Co-Authors: Elizabeth GibneyAbstract:The United Arab Emirates’ Hope orbiter is the Arab world’s first Interplanetary Spacecraft — and has jump-started science in the country. Will the momentum last? The United Arab Emirates’ Hope orbiter is the Arab world’s first Interplanetary Spacecraft — and has jump-started science in the country. Will the momentum last?
X. Z. Yu - One of the best experts on this subject based on the ideXlab platform.
-
Interplanetary Spacecraft navigation using pulsars
Advances in Space Research, 2013Co-Authors: X. P. Deng, George Hobbs, X. P. You, W. Coles, M J Keith, R N Manchester, J. H. Zheng, M.t. Li, R M Shannon, X. Z. YuAbstract:Abstract We demonstrate how observations of pulsars can be used to help navigate a Spacecraft travelling in the solar system. We make use of archival observations of millisecond pulsars from the Parkes radio telescope in order to demonstrate the effectiveness of the method and highlight issues, such as pulsar spin irregularities, which need to be accounted for. We show that observations of four millisecond pulsars every seven days using a realistic X-ray telescope on the Spacecraft throughout a journey from Earth to Mars can lead to position determinations better than ∼20 km and velocity measurements with a precision of ∼0.1 ms-1. © 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
