Results 131 to 140 of about 90,052 (317)
Acquisition, Tracking and Pointing Technology Development for Bifocal Relay Mirror Spacecraft [PDF]
, 2007 The article of record as published may be found at http://dx.doi.org/10.1117/12.720694The purpose of the research is to develop acquisition, tracking, and pointing technologies for the Bifocal Relay Mirror Spacecraft and verify these technologies with ...
Sands, Tim +2 more
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Experimental Physiology, EarlyView.Abstract Astronauts experience combined exposure to a cephalad fluid shift and mild hypercapnia during space missions, potentially contributing to health problems. Such combined exposure may weaken dynamic cerebral autoregulation. The magnitude of cephalad fluid shift varies between individuals, and dynamic cerebral autoregulation may be affected more ...
Tomokazu Kato +2 more
wiley +1 more source
Automatic Mass Balancing of Air-Bearing based Three-Axis Rotational Spacecraft Simulator [PDF]
, 2009 The article of record as published may be found at http://dx.doi.org/10.2514/1.34437Air-bearing-based spacecraft simulators are widely used to develop and verify spacecraft control techniques required by modern spacecraft applications.
Kim, J.J., Agrawal, B.N.
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Experimental Physiology, EarlyView.Abstract Blood flow restriction (BFR) has been identified as a potential countermeasure to mitigate physiological deconditioning during spaceflight. Guidelines recommend that tourniquet pressure be prescribed relative to limb occlusion pressure (LOP); however, it is unclear whether body tilting or reduced gravity analogues influence LOP.
Patrick Swain, Nick Caplan, Luke Hughes
wiley +1 more source
VAMOS – Verification of Autonomous Mission Planning On-board a Spacecraft
, 2013 For typical ground based mission planning systems for low earth satellite missions one major drawback can be detected: The reaction time to on-board-detected events, which includes at least two ground station contacts.
Lenzen, Christoph +2 more
core +1 more source
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
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
IET Science, Measurement & TechnologyThe co‐frequency co‐time full duplex (CCFD) system transmits and receives signals at the same frequency simultaneously, which can effectively improve the communication spectrum utilization of satellite and solve the problem of satellite frequency ...
Yuting Zhang +3 more
doaj +1 more source
IN-SITU EXPLORATION OF EARTH’S ATMOSPHERE USING NOVEL SPACECRAFT DESIGN
, 2009 Altitudes between 40 and 140 km are not accessible for conventional aircraft and spacecraft for long-term duration. In particular the region around 100 km, the upper mesosphere and lower thermosphere (UMLT), is of great interest to scientists and ...
von Savigny, Christian +3 more
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Batch, sequential and hybrid approaches to spacecraft sensor alignment estimation
, 2003 Two Kalman-filter formulations are presented for the estimation of spacecraft sensor misalignments from inflight data. In the first the sensor misalignments are part of the filter state variable; in the second, which we call HYLIGN, the state vector ...
Shuster, M. D., Zanardi, M. C.
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