Results 41 to 50 of about 10,063,597 (281)

Analytical Solution to relative dynamic of gravity tractors in Formation Flying in Asteroid Deflection Mission [PDF]

فصلنامه علوم و فناوری فضایی, 2019
In this paper, an analytical solution to deflection mission of asteroid as potentially hazardous spatial mass that threat humanity in future is investigated . The mission of deflecting potentially hazardous asteroids in recently years with possibility of
Javad Shams, Jafar Roshanian
doaj  

Hardware-in-the-Loop Simulation for Spacecraft Formation Flying

Journal of Control Science and Engineering, 2010
This paper presents a hardware-in-the-loop (HITL) simulation approach for multiple spacecraft formation flying. Considering a leader-follower formation flying configuration, a Fuzzy Logic controller is developed first to maintain the desired formation ...
Jinjun Shan, Piotr Wenderski
doaj   +1 more source

Determination of Initial Conditions for Satellite Formation Flying in Elliptical Orbits [PDF]

Journal of Astronomy and Space Sciences, 2005
The initial conditions that generate bounded motion in eccentric reference orbit are determined for satellite formation flying. Because Hill's equations cannot describe the relative motion between two satellites in eccentric orbit, a new relative ...
Woo-Kyoung Lee, Sung-Moon Yoo, Sang-Young Park, Kyu-Hong Choi, Young-Keun Chang   +4 more
doaj   +1 more source

The influence of three-aircraft formation blinking jamming on the performance of ground monopulse radar

AIP Advances, 2023
The purpose of this study is to evaluate the jamming effectiveness evaluation against monopulse radar when using a non-coherent blinking jamming model at regular intervals based on three aircraft flight trajectories. To begin, the formation trajectory is
Zhaozheng Liu, Xing Wang, Zelong Hao, Weijie Kang, You Chen   +4 more
doaj   +1 more source

Starshade formation flying I: optical sensing [PDF]

, 2020
. A key challenge for starshades is formation flying. To successfully image exoplanets, the telescope boresight and starshade must be aligned to ∼1  m at separations of tens of thousands of kilometers.
M. Bottom, Stefan R. Martin, E. Cady, Megan C. Davis, T. Flinois, D. Scharf, C. Seubert, S. Zareh, S. Shaklan   +8 more
semanticscholar   +1 more source

Autonomous Formation Flying at DLR's German Space Operations Center (GSOC) [PDF]

, 2007
In the upcoming years, significant changes in the profile of satellite missions are expected as scientists and managers want to benefit from multi-satellite missions.
Gill, Eberhard, Rupp, Thomas, D'Amico, Simone, Montenbruck, Oliver   +3 more
core  

Parents of Youth With Cancer Report on Their Psychosocial Care: iSTEPPP Survey Finds Alignment and Gaps With Standards

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The Standards for Psychosocial Care for Children with Cancer and Their Families guide the provision of comprehensive psychosocial care. Parallel to research characterizing implementation of the Standards from the perspective of providers, this study examines implementation of the Standards from the perspective of parents of youth ...
Emily M. Pariseau, Kimberly Buff, Michele A. Scialla, Kimberly S. Canter, Lori Wiener, Victoria Sardi‐Brown, Julia B. Tager, Kamyar Arasteh, Anne E. Kazak   +8 more
wiley   +1 more source

PRISMA - An Autonomous Formation Flying Mission [PDF]

, 2006
PRISMA is an ongoing satellite project comprising two satellites. The project constitutes an in-orbit test bed for Guidance, Navigation and Control (GNC) algorithms and sensors for advanced closed-loop formation flying and rendezvous. The satellites will
Gill, Eberhard, Jörgensen, John, Harr, Jon, Bodin, Per, Persson, Staffan   +4 more
core  

Neurocognitive, School‐Based, and Quality of Life Outcomes for Youth With Sickle Cell Disease and Thalassemia: A Scoping Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT The medical burdens of sickle cell disease (SCD) and transfusion‐dependent β‐thalassemia (TDT) are chronic and cumulative, even in children. Yet the effects expand beyond medications and healthcare visits due to their impacts on school attendance, academic performance, and peer engagement.
Mary Ann Etling, Hakim Tokhi, Alexander A. Boucher   +2 more
wiley   +1 more source

Pattern transition in spacecraft formation flying using bifurcating potential field [PDF]

, 2012
Many new and exciting space mission concepts have developed around spacecraft formation flying, allowing for autonomous distributed systems that can be robust, scalable and flexible.
Derek J. Bennet, Colin R. McInnes, McInnes, Colin, Bennet, Derek James, Bennet, Derek J., McInnes, Colin R.   +5 more
core   +3 more sources