Results 101 to 110 of about 1,938 (262)
Experimental Physiology, EarlyView.Abstract Manned space exploration to distant destinations, including Mars, continues to be an aspiration of humankind. Space travel does, however, present many challenges to the body, amongst which adaptation to microgravity is perhaps the largest. For instance, both short and long manned spaceflight missions have shown substantial deleterious effects ...
Gerard McMahon +2 more
wiley +1 more source
AerospaceIn this paper, a recently proposed SE(3)-constrained extended Kalman filter (EKF) is extended to formulate a strategy for relative orbit estimation in a space-based sensor network. The resulting consensus SE(3)-constrained EKF utilizes space-based sensor
S. Mathavaraj, Eric A. Butcher
doaj +1 more source
GPS-Based Real-Time Navigation for the PRISMA Formation Flying Mission [PDF]
, 2006 The paper addresses the design, implementation and validation of the on-board navigation system for the PRISMA technology demonstration mission. The objective of the navigation system is to provide in real-time absolute and relative orbit information for
Gill, Eberhard +3 more
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Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
Reduced attitude synchronization of rigid spacecraft with guaranteed performance
Franklin OpenThis paper addresses the problem of reduced attitude synchronization, specifically focusing on the coordination of pointing directions between two spacecraft modeled as rigid bodies.
Geethu I., Rakesh R. Warier
doaj +1 more source
Advances in Mechanical Engineering, 2019 The proof mass used for gravitational-wave or Earth-gravity-field detection is usually comprised of materials such as gold–platinum alloys, which have a high density and low magnetic susceptibility, in order to reduce the magnetic disturbance produced by
Zeyang Zhao, Zhaokui Wang, Yulin Zhang
doaj +1 more source
TanDEM-X Scientific Results and Future Formation Flying SAR Missions [PDF]
, 2011 TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurements) is an innovative spaceborne radar interferometer mission that was launched on June 21, 2010. This paper gives an overview of scientific experiments that have been conducted during the TanDEM-
Lopez Dekker, Paco +9 more
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Analysis of Inter-Satellite Communication Protocols and their Effects on Satellite Formation Control [PDF]
, 2011 Satellite Formation Flying (SFF) enables the collective use of multiple spacecraft to perform the function of a single, large, virtual instrument.
TORTORA, PAOLO +2 more
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Dynamics Modeling of Spacecraft Formation Flying and Evaluating the Models Accuracy under the Effects of Relative Distance, Eccentricity and Earth Gravitational Perturbation [PDF]
فصلنامه علوم و فناوری فضایی, 2012 Relative motion of satellites in a formation can be studied in several forms of dynamics models. In this paper, some of the most applicable models each implying particular assumptions, constraints and specifications are described in Cartesian and orbital
M. Navabi, M. Barati
doaj
Application of discrete time sliding mode control to a spacecraft in 6DoF [PDF]
This paper presents the application of two separate discrete time sliding mode controllers, developed in conjunction with a potential function guidance method, to provide control in both position and attitude for a rigid, holonomic spacecraft body.
Veres, Sandor M., Lincoln, Nicholas K.
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