Results 241 to 250 of about 13,582,991 (332)

Mitral Regurgitation Caused by Concomitant Pseudoaneurysms of the Sinus of Valsalva and Ascending Aorta. [PDF]

Am J Case Rep
Ahmed EO, Babgi MF, Abdulrahman OA, Hameedullah I.   +3 more
europepmc   +1 more source

A Rare Case of Invasive Pneumococcal Disease Presenting With Pneumonia, Meningitis, Septic Arthritis, and Cerebral Infarcts. [PDF]

Cureus
Waraich H, Haq H, Abdullah H.
europepmc   +1 more source

Improvements in PPP by Integrating GNSS with LEO Satellites: A Geometric Simulation. [PDF]

Sensors (Basel)
Alghisi M, Zallemi N, Biagi L.
europepmc   +1 more source

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An Efficient LEO Global Navigation Constellation Design Based on Walker Constellation

2020 IEEE Computing, Communications and IoT Applications (ComComAp), 2020
Compared with medium Earth orbit (MEO) and high Earth orbit (HEO) satellites, low Earth orbit (LEO) satellites have lower cost, smaller power loss and shorter transmission delay, which mean they can be used in many areas like navigation and space-based internet of things (IOT), etc.
Yanbo Wei, Huaijian Li, Xiaojing Du
openaire   +2 more sources

Cislunar Satellite Constellation Design via Integer Linear Programming

The Journal of the astronautical sciences, 2023
Cislunar space domain awareness is of increasing interest to the international community as Earth-Moon traffic is projected to increase, which raises the problem of placing space-based sensors optimally in a constellation to satisfy the space domain ...
Malav Patel, Yuri Shimane, Hang Woon Lee, Koki Ho   +3 more
semanticscholar   +1 more source

Satellite constellation design for 5G wireless networks of mobile communications

International Journal of Satellite Communications And Networking, 2023
Satellite constellation design plays an important role in satellite networks. Network constellation system design can affect the effectiveness of current improvements of the communications link and the management of the entire network.
Ravandran Muttiah
semanticscholar   +1 more source

Repeat Ground Track SAR Constellation Design Using Revisit Time Image Extrapolation and Lookup-Table-Based Optimization

IEEE Transactions on Geoscience and Remote Sensing, 2023
Designing repeat ground track (RGT) synthetic aperture radar (SAR) constellations for achieving rapid revisits over key areas is essential to employ spaceborne differential interferometric SAR (D-InSAR) technology in Earth observation missions, such as ...
Xichao Dong, Yi Sui, Yuanhao Li, Zhiyang Chen, Cheng Hu   +4 more
semanticscholar   +1 more source