Results 31 to 40 of about 86,122 (316)

Disposal orbits for GEO spacecraft: A method for evaluating the orbit height distributions resulting from implementing IADC guidelines [PDF]

, 2010
Geostationary orbit (GEO) is the most commercially valuable Earth orbit. The Inter-Agency Space Debris Coordination Committee (IADC) has produced guidelines to help protect this region from space debris.
Hobbs, Stephen
core   +1 more source

Enhancing Bidirectional Modbus TCP ↔ RTU Gateway Performance: A UDP Mechanism and Markov Chain Approach

Sensors
In the Industrial Internet of Things (IIoT) field, the diversity of devices and protocols leads to interconnection challenges. Conventional Modbus Transmission Control Protocol (TCP) to Remote Terminal Unit (RTU) gateways suffer from high overhead and ...
Shuang Zhao, Qinghai Zhang, Qingjian Zhao, Xiaoqian Zhang, Yang Guo, Shilei Lu, Liqiang Song, Zhengxu Zhao   +7 more
doaj   +1 more source

CONTROL OF IN-ORBIT SPACE MANIPULATION

IFAC Proceedings Volumes, 1985
Abstract Present European and French programs are carried out in the field of space robotics. Considering space applications and special constraints encountered in space environment, various design concepts are discussed. Results of on going research and development efforts in the field of terrestrial manipulator control are considered.
J.L. Lacombe, Th. Blais
openaire   +1 more source

Corrosion behavior of scratched coated steel structures in marine atmospheric environments [PDF]

AIP Advances
To examine the corrosion behavior of scratched coatings in marine atmospheric environments, this study developed a multiphysics coupling model to evaluate the effects of scratch geometry (linear, circular, elliptical, and cross-shaped), defect size ...
Wenbo Li, Zhengxu Zhao
doaj   +1 more source

Orbital and strongly orbital spaces

Journal of Mathematical Analysis and Applications, 2014
Submitted to JMAA.
openaire   +3 more sources

Electrochromic orbit control for smart-dust devices

, 2012
Recent advances in MEMS (micro electromechanical systems) technology are leading to spacecraft which are the shape and size of computer chips, so-called SpaceChips, or ‘smart dust devices’.
Colombo, Camilla, McInnes, Colin, Lucking, Charlotte, McInnes, Colin R.   +3 more
core   +1 more source

Robotic On-Orbit Servicing - DLR's Experience and Perspective.

, 2006
The increasing number of launched satellites per year, calls for solutions to keep free operational space for telecommunication systems in geo-synchronized orbit, as well as to avoid the endangering of space systems in LEO (Low-Earth Orbit) and of the ...
Landzettel, Klaus, Albu-Schäffer, Alin Olimpiu, A. Albu-Schaffer, Reintsema, Detlef, D. Reintsema, Rebele, Bernhard, C. Preusche, G. Hirzinger, Hirzinger, Gerhard, K. Landzettel, Preusche, Carsten, B. Rebele   +11 more
core   +1 more source

STar-DETR: A Lightweight Real-Time Detection Transformer for Space Targets in Optical Sensor Systems

Sensors
Optical sensor systems are essential for space target detection. However, previous studies have prioritized detection accuracy over model efficiency, limiting their deployment on resource-constrained sensors.
Yao Xiao, Yang Guo, Qinghao Pang, Xu Yang, Zhengxu Zhao, Xianlong Yin   +5 more
doaj   +1 more source

A Case Study on the Effect of Atmospheric Density Calibration on Orbit Predictions with Sparse Angular Data

Remote Sensing, 2023
Accurately modeling the density of atmospheric mass is critical for orbit determination and prediction of space objects. Existing atmospheric mass density models (ADMs) have an accuracy of about 15%.
Junyu Chen, Jizhang Sang, Zhenwei Li, Chengzhi Liu   +3 more
doaj   +1 more source

Analytic Moduli Spaces as Orbit Spaces

Publications of the Research Institute for Mathematical Sciences, 1987
This paper is an announcement of some general results on abstract local deformation theory in the complex-analytic context. Here semi-universal deformations are constructed as transversal slices to some group actions (in infinite dimensions). Proofs can be found in the joint book with the reviewer [Lokale Modulräume in der analytischen Geometrie (1987)]
openaire   +2 more sources