Results 11 to 20 of about 54,794 (263)

Ozone Monitoring Instrument (OMI) Aura nitrogen dioxide standard product version 4.0 with improved surface and cloud treatments [PDF]

Atmospheric Measurement Techniques, 2021
We present a new and improved version (V4.0) of the NASA standard nitrogen dioxide (NO2) product from the Ozone Monitoring Instrument (OMI) on the Aura satellite.
L. N. Lamsal, L. N. Lamsal, N. A. Krotkov, A. Vasilkov, A. Vasilkov, S. Marchenko, S. Marchenko, W. Qin, W. Qin, E.-S. Yang, E.-S. Yang, Z. Fasnacht, Z. Fasnacht, J. Joiner, S. Choi, S. Choi, D. Haffner, D. Haffner, W. H. Swartz, B. Fisher, B. Fisher, E. Bucsela   +21 more
doaj   +1 more source

A Shape-Based Method for Continuous Low-Thrust Trajectory Design between Circular Coplanar Orbits

International Journal of Aerospace Engineering, 2017
The shape-based method can provide suitable initial guesses for trajectory optimization, which are useful for quickly converging a more accurate trajectory.
Qun Fang, Xuefeng Wang, Chong Sun, Jianping Yuan   +3 more
doaj   +1 more source

A TSR Visual Servoing System Based on a Novel Dynamic Template Matching Method

Sensors, 2015
The so-called Tethered Space Robot (TSR) is a novel active space debris removal system. To solve its problem of non-cooperative target recognition during short-distance rendezvous events, this paper presents a framework for a real-time visual servoing ...
Jia Cai, Panfeng Huang, Bin Zhang, Dongke Wang   +3 more
doaj   +1 more source

Analysis and Demonstration of First Cross-Support Interferometry Tracking in China Mars Mission

Remote Sensing, 2022
Delta-Differential One-Way Ranging (DeltaDOR) is widely used in deep spacecraft navigation, and cross support could enhance navigation accuracy with more interferometry baselines and longer baseline.
Songtao Han, Haijun Man, Mei Wang, Zhijin Zhou, Jianfeng Cao, Wei Gao, Lue Chen, Jinsong Ping   +7 more
doaj   +1 more source

Flight guidance concept for the launching and landing phase of a flying wing used in an airborne wind energy system [PDF]

Wind Energy Science
Airborne wind energy (AWE) is an emerging technology that harvests energy by utilizing tethered airborne systems in wind fields. Given their favorable aerodynamic characteristics, employing flying wings as airborne systems holds considerable promise for ...
D. F. Duda, H. Fuest, T. Islam, D. Moormann   +3 more
doaj   +1 more source

Insect Flight Dynamics and Control

44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
Motivated by recent interest in developing flapping wing micro-air vehicles (MAVs) capable of emulating the flight performance of insects, we describe the state of the art in our understanding of insect flight dynamics. We first outline some general principles of flapping flight dynamics, before presenting a framework for modelling insect flight ...
Taylor, G, Bomphrey, R, 'T Hoen, J
openaire   +2 more sources

Adaptive Caging Configuration Design Algorithm of Hyper-Redundant Manipulator for Dysfunctional Satellite Pre-Capture

IEEE Access, 2020
This paper presents an adaptive caging configuration design algorithm of the hyper-redundant manipulator for dysfunctional satellite pre-capture. Taking advantages of the extreme flexibility and hyper-redundancy, the hyper-redundant manipulator wraps its
Wenya Wan, Chong Sun, Jianping Yuan
doaj   +1 more source

Autonomous Rendezvous and Docking with Nonfull Field of View for Tethered Space Robot

International Journal of Aerospace Engineering, 2017
In the ultra-close approaching phase of tethered space robot, a highly stable self-attitude control is essential. However, due to the field of view limitation of cameras, typical point features are difficult to extract, where commonly adopted position ...
Panfeng Huang, Lu Chen, Bin Zhang, Zhongjie Meng, Zhengxiong Liu   +4 more
doaj   +1 more source

Reconstruction of Bennu Particle Events From Sparse Data

Earth and Space Science, 2020
OSIRIS‐REx began observing particle ejection events shortly after entering orbit around near‐Earth asteroid (101955) Bennu in January 2019. For some of these events, the only observations of the ejected particles come from the first two images taken ...
John Y. Pelgrift, Erik J. Lessac‐Chenen, Coralie D. Adam, Jason M. Leonard, Derek S. Nelson, Leilah McCarthy, Eric M. Sahr, Andrew Liounis, Michael Moreau, Brent J. Bos, Carl W. Hergenrother, Dante S. Lauretta   +11 more
doaj   +1 more source

Animal Flight Dynamics I. Stability in Gliding Flight

Journal of Theoretical Biology, 2001
Stability is as essential to flying as lift itself, but previous discussions of how flying animals maintain stability have been limited in both number and scope. By developing the pitching moment equations for gliding animals and by discussing potential sources of roll and yaw stability, we consider the various sources of static stability used by ...
Thomas, A, Taylor, G
openaire   +2 more sources