A5061444171- Planetary Science and Exploration
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Energy Efficient Wireless Sensor Networks
- Advanced Computational Techniques and Applications
- IoT Networks and Protocols
- Soil Moisture and Remote Sensing
- Earthquake Detection and Analysis
- Direction-of-Arrival Estimation Techniques
- Space Science and Extraterrestrial Life
- Security in Wireless Sensor Networks
- Underwater Vehicles and Communication Systems
- Underwater Acoustics Research
- Radio Wave Propagation Studies
- Methane Hydrates and Related Phenomena
- Scientific Research and Discoveries
- Lightning and Electromagnetic Phenomena
- Mobile Ad Hoc Networks
- Smart Grid and Power Systems
- Fire Detection and Safety Systems
- Power Systems and Technologies
- IoT-based Smart Home Systems
Wuhan University
2011-2024
University of Leicester
2024
State Grid Corporation of China (China)
2024
North China Electric Power University
2013
Abstract Ionospheric plasma density disturbances significantly affect radio wave propagation, impacting communication and planetary exploration. At Earth, sporadic E layers (Es) are commonly observed. They characterized by thin, high-density structures in the E-region ionosphere, primarily formed electromagnetic forces induced horizontal wind shears. Similar sharp vertical electron changes have also been observed topside of Martian ionosphere missions like Mars Global Surveyor, Express,...
Abstract For the past few decades, it has been demonstrated that gravity waves (GWs) and neutral winds can drive ionospheric irregularities on Earth. Still, as far we know, formation of Mars due to GWs not well studied. In this study, use data from NASA's Atmosphere Volatile Evolution (MAVEN) mission show evidence an irregularity event in Martian ionosphere, potentially seeded by break (GWB). Statistical findings indicate observed ratio GWB‐related events varies ∼0.25 ∼0.47 each year,...
Abstract Spacecraft observations around Mars show that ionospheric irregularities occur frequently in the Martian ionosphere. In this study, Atmosphere and Volatile Evolution data (the region is below ∼200 km) during 2015 January to 2021 March were used revisit statistical characteristics of comparison years with higher or lower solar activity phase cycle. Results a larger length scale associated magnetic field zenith angle are similar previous studies. Moreover, our results occurrence rate...
Abstract Spread F is one of most widely observed nighttime ionospheric irregularities by ionosondes in the equatorial, low‐ and mid‐latitude regions. One type spread F, known as strong range (backscatter echoes beyond critical frequency F2 layer, foF2), has been equatorial low‐latitude regions but not at middle latitudes. This study reported for first‐time observations Zhangye Station (ZHY, Geographical latitude 39.4°N, longitude 100.0°E, Dip Lat 29.6°N) on 29 November 2019 (under quiescent...
WIOBSS is a low-power instrument for monitoring and researching the ionosphere. Unfortunately, as operate in High-Frequency (HF) band, its performance suffers from lot of unwanted interferences, which can result low signal to interference noise ratios (SINR) ionogram quality. In this letter, an analysis range-domain correlation radio frequency (RFI) presented. Based on this, novel eigen-subspace based filtering approach ionospheric oblique backscatter sounding proposed. It slides range...
For the past few decades, it has demonstrated that gravity waves (GWs) and neutral winds can drive ionospheric irregularities on Earth. Still, as far we know, formation of irregularity Mars due to GWs not been well studied. In this study, use data from NASA's Atmosphere Volatile Evolution (MAVEN) mission show evidence an event in Martian ionosphere, which is potentially seeded by break (GWB). The statistical findings indicate observed ratio GWB-related events varies ~0.25 0.57 each year,...
To address the challenges of wiring operation and maintenance in substations security issues associated with wireless data acquisition smart grid environments, we have developed a secure system for substation monitoring. This integrates 5G, short-range communication, Internet Things (IoT) technology, video processing to establish unified access model. The comprises an intelligent gateway deployed at network boundary, equipped hardware encryption cards terminal authentication, encryption,...
Many Mars missions, e.g., Mariner, Viking, Global Surveyor (MGS), Express (MEX), and Atmosphere Volatile Evolution (MAVEN), have been launched to study the Martian atmosphere. These observations improved our understanding of ionosphere Mars. Observations show that could be divided into an M2 layer (at ~140 km altitude) M1 ~110 altitude), ionized by EUV X-ray solar radiation, respectively. However, there are still many scientific questions about ionosphere. A transient topsider (also called...
Abstract Equatorial plasma bubbles (spread F/ionospheric irregularities) are density irregularities or depletion in the ionosphere. It can be observed by radio waves, optical and situ instruments during postsunset equatorial low‐latitude regions. Severe scintillations waves caused presence of bubbles. Therefore, studies become one most important hot topics. Many have been devoted to physical mechanism characteristics However, some critical issues (e.g., day‐to‐day variability, complex...
In wireless sensor networks, nodes are inherently restricted by insufficient hardware resources, such as computing capacity and battery lifetime. As a result, current key management schemes difficult to be deployed in networks. This paper proposes new method that the shared keys dynamic updated for The proposed scheme loads two hash functions an initial into base station, cluster heads, nodes. Every node including heads authenticates its neighbor with key. Then every establishes pair wise...
Recently, kilometer-scale Martian ionospheric irregularities have been measured by the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission (Fowler et al., 2020). In this study, we carried out a simulation of these irregularities, assuming uniform zonal neutral wind cosinusoidal perturbation plasma density as seeding source. Results show that vertical electric field shear could be induced such perturbation. We find causes velocity between topside bottomside ionosphere, which in turn is...
Since the power system frequency and time synchronization network are networking alone, which brings a lot of synchronization, reliability security issues, this article will merge into one to set up grid. In paper, we present new generation program with BDS GPS timing as cure. Meanwhile, it presents three-level synchronized demonstration is consist provincial grid, municipal grid substations. And Iin end, conduct some research on related technologies program. DOI :...