A5067636339- Ionosphere and magnetosphere dynamics
- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Space exploration and regulation
- X-ray Spectroscopy and Fluorescence Analysis
- Calibration and Measurement Techniques
- interferon and immune responses
- Inflammasome and immune disorders
- Electron and X-Ray Spectroscopy Techniques
- Adipokines, Inflammation, and Metabolic Diseases
Shanghai Astronomical Observatory
2018-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2020-2024
Nanjing University of Chinese Medicine
2024
University of Chinese Academy of Sciences
2018-2021
The plasmasphere is located above the ionosphere with low-energy plasma, which an important component of solar-terrestrial space environment. As link between and magnetosphere, plays role in coupling process. Therefore, it great significance to study electron content variation for Nowadays, topside global positioning system (GPS) observations on Low Earth Orbit (LEO) satellites provide a unique opportunity estimate variations plasmasphere. In this paper, plasmaspheric total (PTEC) estimated,...
The third generation of China’s BeiDou Navigation Satellite System (BDS-3) began to provide global services on 27 December, 2018. Differential code bias (DCB) is one the errors in precise BDS positioning and ionospheric modeling, but impacts BDS-2 satellites receiver DCB are unknown after joining BDS-3 observations. In this paper, DCBs estimated analyzed using Multi-Global (GNSS) Experiment (MGEX) observations during period day year (DOY) 002–031, 2019. results indicate that have a good...
The radio occultation (RO) measurements of the Global Navigation Satellite System’s (GNSS’s) signals onboard a Low Earth Orbiting (LEO) satellite enable computation vertical electron density profile from LEO satellite’s orbit height down to Earth’s surface. ionospheric extension experiment performed by GNSS Receiver for Atmospheric Sounding (GRAS) receiver on board MetOp-A provides opportunities sounding but with RO only taken an impact parameter below 600 and 300 km within two different...
In this work, a dedicated campaign by MetOp-A satellite is conducted to monitor the ionosphere based on radio-occultation (RO) measurements provided onboard GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS). The main goal analyze capabilities of collected data represent bending angle and scintillation profiles ionosphere. We compare products with those generated other RO missions explore spatial/temporal distributions sensed campaign. Validation dual...
Monitoring and understanding geophysical processes in the thermosphere is primordial for space physics, low Earth orbiters, ground-based technologies. In last half century, thermospheric variations, anomalies, climatology have been investigated reported, but were limited due to lack of observations large uncertainty models. Today, Global Navigation Satellite Systems (GNSS) accelerometers on small satellites can sense neutraldensity wind variations with unprecedented accuracy, which...
Geomagnetic storms are extreme space weather events, which have considerable impacts on the ionosphere and power transmission systems. In this paper, ionospheric responses to geomagnetic storm 22 June 2015, analyzed from ground-based satellite-based Global Navigation Satellite System (GNSS) observations as well observational data of digital ionosondes, main physical mechanisms disturbances observed during discussed. Salient positive negative vertical total electron content (VTEC) based GNSS...
Abstract The differential code biases (DCBs) of the global positioning system (GPS) receiver onboard low-Earth orbit (LEO) satellites are commonly estimated by a local spherical symmetry assumption together with known GPS satellite DCBs from ground-based observations. Nowadays, more and LEO equipped receivers for precise determination, which provides unique chance to estimate both without any ground data. A new method using network is proposed. multi-layer mapping function (MF) used combine...
This paper presents a novel technique to estimate DCBs from GPS transmitters and receivers on-board Low Earth Orbit (LEO) satellites. The consists of obtaining the as residuals difference between ionospheric combination code associated delay. delay is computed with TOMION, background-model-free tomographic based on dual-frequency carrier phase data only, solved Kalman filter. Thus, are also estimated epoch-wise LEO Precise Determination (POD) receiver secondary product. results for satellite...
Chronic inflammation induced by obesity plays a crucial role in the pathogenesis of insulin resistance. The infiltration macrophages into adipose tissues contributes to tissue and Kaempferol, flavonoid present various vegetables fruits, has been shown possess remarkable anti-inflammatory properties. In this study, we used leptin receptor-deficient obese mice (db/db) as an insulin-resistant model investigated effects kaempferol treatment on obesity-induced Our findings revealed that...
The differential code bias (DCB) of the Global Navigation Satellite Systems (GNSS) receiver should be precisely corrected when conducting ionospheric remote sensing and precise point positioning. DCBs can usually estimated by ground GNSS network based on parameterization global ionosphere together with map (GIM). In order to reduce spatial-temporal complexities, various algorithms GIM local modeling are conducted, but rely station selection. this paper, we present a recursive method estimate...
We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of products. The main objective is validate generated at EUMETSAT, such as bending angle profiles, amplitude and phase scintillations, topside Total Electron Content (TEC) from MetOp-A GRAS instrument well generating validating new products derived RO TEC, rate TEC vertical electron density profiles....
Abstract Data assimilation is one of the most important approaches to monitoring variations ionospheric electron densities. The construction background error covariance matrix an component data assimilations. To construct matrix, information about spatial correlations required. We present a statistical analysis on vertical correlation length (VCL) based global network ionosondes and Neustrelitz Electron Density Model. show that locally derived VCL well‐defined does not considerable...
In the recent years we have witnessed unprecedented increase in both active and expired space missions (debris) – a scenario, if continued, that can lead to generation of even more debris through possible ‘satellite-satellite’ collision, ‘satellite-debris’ collision and/or ‘debris-debris’ (Kessler effect), especially heavily used low Earth orbit (LEO). Consequently, possibility risk-free utilization sustainability is...
Abstract The low‐density cell structure in the high‐latitude thermosphere is referred to as density depletion with respect adjacent area. Based on Gravity Recovery and Climate Experiment (GRACE) accelerometer data during September 2017 geomagnetic storms, thermospheric mass at about 350 km are estimated further investigated especially regions. At least two kinds of cells over Southern Hemisphere (SH) observed along GRACE orbit. To understand structures SH by GRACE, we investigate underlying...
Abstract With the development of Global Navigation Satellite System (GNSS) and regional augmentation systems, influence ionosphere on GNSS signals is becoming increasingly important. It also particular interest to retrieve electron density distribution from observations. We have successfully developed a four‐dimensional variational assimilation scheme, Neustrelitz Electron Density Assimilation Model (NEDAM), verified NEDAM by simulation study using European ground‐based network. The...