Results 41 to 50 of about 6,136,424 (429)
Small PN-Code Lidar for Asteroid and Comet Missions—Receiver Processing and Performance Simulations
Remote Sensing, 2021 Space missions to study small solar system bodies, such as asteroids and comet cores, are enhanced by lidar that can provide global mapping and serve as navigation sensors for landing and surface sampling.
Daniel R. Cremons +3 more
doaj +1 more source
An Investigation into Active Control for Accessible Orbital Flight [PDF]
arXiv, 2023 Recently, a practical and publicly accessible satellite standard called the SmallSat has amplified public involvement in orbital research. This allows for flexible and efficient deployments of impactful low-earth-orbit experiments that would otherwise never be flown.
arxiv
Assessment of Nutritional Intake During Space Flight and Space Flight Analogs
Procedia Food Science, 2013 AbstractMaintaining adequate nutrient intake during space flight is important not only to meet nutrient needs of astronauts but also to help counteract negative effects of space flight on the human body. Beyond these functions, food also provides psychosocial benefits throughout a mission. Dietary intake data from multiple space programs, including the
Sara R. Zwart +3 more
openaire +2 more sources
Robust and Efficient Quadrotor Trajectory Generation for Fast Autonomous Flight [PDF]
IEEE Robotics and Automation Letters, 2019 In this letter, we propose a robust and efficient quadrotor motion planning system for fast flight in three-dimensional complex environments. We adopt a kinodynamic path searching method to find a safe, kinodynamic feasible, and minimum-time initial ...
Boyu Zhou +4 more
semanticscholar +1 more source
Decreases in thymopoiesis of astronauts returning from space flight.
JCI Insight, 2016 Following the advent of molecular assays that measure T cell receptor excision circles (TRECs) present in recent thymic emigrants, it has been conclusively shown that thymopoiesis persists in most adults, but that functional output decreases with age ...
Cara L. Benjamin +7 more
semanticscholar +1 more source
, 2012 A well known behavior of EUV light curves of discrete coronal loops is that the peak intensities of cooler channels or spectral lines are reached at progressively later times than hotter channels.
Center, NASA Goddard Space Flight +2 more
core +1 more source
The Global Precipitation Measurement (GPM) Spacecraft Power System Design and Orbital Performance
E3S Web of Conferences, 2017 The Global Precipitation Measurement (GPM) spacecraft was jointly developed by National Aeronautics and Space Administration (NASA) and Japan Aerospace Exploration Agency (JAXA). It is a Low Earth Orbit (LEO) spacecraft launched on February 27, 2014. The
Dakermanji George +6 more
doaj +1 more source
CMB and Random Flights: temperature and polarization in position space [PDF]
JCAP06(2013)043, 2013 The fluctuations in the temperature and polarization of the cosmic microwave background are described by a hierarchy of Boltzmann equations. In its integral form, this Boltzmann hierarchy can be converted from the usual Fourier-space base into a position-space and causal description. We show that probability densities for random flights play a key role
arxiv +1 more source
Communications Earth & EnvironmentWe report on observed trend anomalies in climate-relevant global ocean biogeochemical properties, as derived from satellite ocean color measurements, that show a substantial decline in phytoplankton carbon concentrations following eruptions of the ...
Bryan A. Franz +3 more
doaj +1 more source