Results 1 to 10 of about 18,596 (191)
Atmospheric Effects on Satellite–Ground Free Space Uplink and Downlink Optical Transmissions
Applied Sciences, 2022 Free space optical (FSO) communications have the potential to be one of the most essential technologies for solving the high-bandwidth demands of communications between satellites and ground stations.
Nilesh Maharjan +2 more
doaj +5 more sources
Results in Physics, 2021 Increasing experimental and theoretical results have confirmed that the anisotropy of turbulence cells cannot be ignored in the atmospheric turbulence. The satellite-to-ground downlink is the important part of satellite optical communication network, so ...
Chao Zhai
doaj +4 more sources
Aerospace, 2022 In the multi-satellite and multi-ground station downlink task scheduling problem, the waiting time from the proposal of the task to the execution will affect its validity.
Yan Liu, Shengyu Zhang, Haiying Hu
doaj +4 more sources
Effects of atmospheric turbulence on fiber-coupled DPSK system in Satellite-to-Ground downlink
Results in Physics, 2018 Fiber-coupled differential phase-shift keying (DPSK) modulation is potentially an effective approach for further high-speed satellite lasercom, due to the high detection sensitivity, low linewidth requirements, and uncalled-for complex phase-locked loop ...
Qingbo Yang +6 more
doaj +3 more sources
A Hybrid Genetic Algorithm for Satellite Image Downlink Scheduling Problem
Discrete Dynamics in Nature and Society, 2018 The satellite image downlink scheduling problem (SIDSP) is included in satellite mission planning as an important part. A customer demand is finished only if the corresponding images are eventually downloaded.
Bingyu Song +4 more
doaj +2 more sources
Results in Physics, 2021 As many related experimental and theoretical results are identified, scholars have found that the anisotropy of turbulence cells is indispensable in the atmospheric turbulence. In this paper, based on a new anisotropic non-Kolmogorov turbulence spectrum for the satellite links that is applicable to both vertical and slant links, the probability density
Chao Zhai
exaly +3 more sources
Deep Rainrate Estimation from Highly Attenuated Downlink Signals of Ground-Based Communications Satellite Terminals [PDF]
, 2020 peer reviewedWhile the use of weather radars to continuously monitor the spatiotemporal dynamics of precipitation has grown in recent years, these systems are expensive and sparsely deployed across the world. In this context, densely located ground-based
Kumar Vijay Mishra +2 more
exaly +2 more sources
Evapotranspiration Everywhere, All the Time: Towards a Unified View From Earth Observation. [PDF]
Glob Chang BiolThis paper discusses the evolution and revolution of Earth observation for evapotranspiration (ET), as we advanced from the first Landsat satellite and development of ET models through the progression of increasingly higher resolution across international space agencies and commercial industry with increasing ET model sophistication, cloud computing ...
Fisher JB +6 more
europepmc +2 more sources
IEEE Access, 2018 In the era of the Internet of Things, the role of a satellite has become increasingly important. The use of satellite resources can meet the needs of high-speed Internet connection of the Internet of Things. Effective communication between satellites and
Yan-Jie Song +3 more
doaj +3 more sources