A5076035840- Marine and coastal ecosystems
- Water Quality Monitoring and Analysis
- Water Quality Monitoring Technologies
- Oceanographic and Atmospheric Processes
- Calibration and Measurement Techniques
- Remote Sensing and Land Use
- Atmospheric and Environmental Gas Dynamics
- Oil Spill Detection and Mitigation
- Atmospheric Ozone and Climate
- Remote-Sensing Image Classification
- Infrared Target Detection Methodologies
- Coral and Marine Ecosystems Studies
- Atmospheric chemistry and aerosols
- Coastal and Marine Management
- Atmospheric aerosols and clouds
- Climate variability and models
- Environmental Changes in China
- Ocean Waves and Remote Sensing
- Arctic and Antarctic ice dynamics
- Remote Sensing in Agriculture
- Aquatic Ecosystems and Phytoplankton Dynamics
- Air Quality Monitoring and Forecasting
- Advanced Sensor and Control Systems
- Marine and fisheries research
- Marine and coastal plant biology
National Satellite Ocean Application Service
2015-2024
Ministry of Natural Resources
2013-2024
State Key Laboratory of Remote Sensing Science
2020-2024
Ministry of Water Resources of the People's Republic of China
2021-2023
Peking University
2017
Collaborative Innovation Center of Quantum Matter
2017
Xihua University
2005
Detecting the vertical profile of optical properties is an important task in remote sensing upper ocean, especially for 3-D reconstruction. Ocean color can only provide surface information, while light detection and ranging (lidar) technique depth-resolved data. Lidar global-scale observations ocean days nights with minimal atmospheric correction errors. Unfortunately, due to strong multiple scattering effects that occur when propagates seawater, simple lidar equation may cause some...
In order to acquire inherent optical properties serve the lake water colour/quality remote sensing in Taihu Lake 67 samples were distributed almost all over lake. Surface collected and returned laboratory for subsequent processing analysis. laboratory, absorptions due total particulate matter, non‐algal phytoplankton pigment, CDOM, together with their concentrations measured and/or calculated, respectively. Then absorption analysed compared those of other waters coastal/open waters. Some...
Accurate atmospheric correction (AC) is essential in retrieving ocean and coastal water ecosystem products from colour remote sensing data. Generally, the algorithms that are based on Near Infrared (NIR) bands effective clear water, whereas algorithm ultraviolet (UV) deliver accurate results turbid water. A practical approach to employ a UV-NIR combined uses both UV NIR for respectively. However, currently, generates data discontinuity pattern when single threshold value used, as exhibits...
The HydroScat‐6 spectral backscattering sensor was used to measure in situ the coefficients at six wavelengths (442, 488, 532, 589, 676, 852 nm) 67 samples from all over Taihu Lake, China. measured raw data were corrected with tested probabilities of 0.015, 0.019, 0.030 and 0.050. Combined simulated by optimization algorithm, it shows that probability (a ratio between coefficient scattering suspended particulate matter), a mean 0.041 (SD 0.030), is wavelength‐dependent not constant, may be...
Climate change and human activities have been heavily affecting oceanic inland waters, it is critical to a comprehensive understanding of the aquatic optical properties lakes. Since many key watercolor parameters Qinghai Lake are not yet available, this paper aims study spatial temporal variations water clarity (i.e., Secchi-disk depth, ZSD) suspended particulate matter concentration (CSPM) in from 2001 2020 using MODIS images. First, four atmospheric correction models, including NIR–SWIR,...
The analytical model based on the quasi-single small-angle scattering approximation can efficiently simulate oceanic lidar signals with multiple scattering; thus, its accuracy is of particular interest to scientists. In this paper, modified include refraction at oblique incidence and then compared Monte Carlo (MC) simulations experimental results. Under different conditions, results calculated by demonstrate good agreement MC simulation data. coefficient determination R2 considering...
Remote sensing reflectance obtained from space-borne ocean color sensors is of great importance to carbon cycle and ocean-atmospheric interactions by providing biogeochemical parameters on the global scale using specific algorithms. Vicarious calibration necessary for obtaining accurate remote that meets application demands atmospheric correction For sensors, vicarious must be done prior correction. The third Chinese Ocean Color Temperature Scanner (COCTS) aboard HY1C satellite was launched...
海洋一号C星(HY-1C)和海洋一号D星(HY-1D)是中国首次对地观测组网的海洋水色业务化应用卫星,其上搭载了海洋水色水温扫描仪COCTS(Chinese Ocean Color and Temperature Scanner)、海岸带成像仪CZI(Coastal Zone Imager)、紫外成像仪UVI(Ultra-Violet Imager)、星上定标光谱仪SCS(Satellite-based Calibration Spectrometer)和船舶自动识别系统AIS(Automatic Identification System),实现了全球海洋水色要素每天2次、海表温度每天4次的全球覆盖观测,中国近海及海岸带区域每3天2次的50...
Applying standard aerosol models for atmospheric correction in nearshore coastal waters introduces significant uncertainties due to their inability accurately represent characteristics these regions. To improve the accuracy of remote sensing reflectance (Rrs) products Shandong Peninsula, this study develops an model based on data collected from Mu Ping site area enabling tailored specific region. Given pronounced seasonal variations optical properties, monthly were developed. The is derived...
Using in situ optical measurements collected during the 2003 spring cruise over Yellow and East China seas, particle backscattering ratio is calculated spectral variability analyzed by means of geometric mean regression. The analysis shows that can be regarded as wavelength‐independent range 442–676 nm, given measurement uncertainties associated with scattering data. attenuation are used to calculate refractive index, which related composition. distributions index water component...
In this study, sea surface skylight spectral reflectance ρ(λ) was retrieved by means of the non-linear optimization method and a bio-optical model. The variability found to be mainly influenced uniformity incident skylight, model is proposed predict dependency based on at 750 nm. It demonstrated that using spectrally variable ρ(λ), rather than constant, yields an improved agreement between above-water remote sensing R(rs)(λ) estimates concurrent profiling ones. findings study highlight...
The Chinese ocean color and temperature scanner (COCTS) onboard the HY-1C satellite was launched on September 7, 2018, has been providing global multispectral Earth observation data as a new spaceborne sensor for detection since 10, 2018. In this study, an atmospheric correction algorithm using composite of algorithms developed by Wang Gordon (1994) He <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">et al.</i> (2004) chlorophyll-a...
In 2018, the Haiyang-2B (HY-2B) satellite altimeter was sent to orbit as a follow-up mission of HY-2A altimeter. The performance HY-2B system over global oceans is considered be critical. However, its not fully known at present time. study, first quality assessment Geophysical Data Record (GDR) presented using comparison and crossover analysis processes main parameters sea level anomalies (SLAs) with Jason-3 GDR data. This study’s results demonstrated that editing proportion unqualified data...
Phytoplankton are the main factors influencing light under sea surface in Case Ι water. The ocean reflectance model (ORM), which takes into account chlorophyll a concentration data, can calculate remote sensing of In this study, we examined differences and performance four ORMs, including Morel Maritorena (2001, MM01), Gentili (2007, MG07), Mobley (2014, MO14), Hydrolight Abcase1 Lookup Tables. between ORMs terms their absorption backscattering coefficients were evaluated. Preformation was...
Ocean color remote sensing using visible spectral bands with or without the combination of near infrared (NIR) for retrieval suspended sediment (SS) concentration (SSC) has been proven to be successful in low and medium turbid waters, but are prone saturated less sensitive high-turbid waters. This paper proposes an NIR SS index (NISSI) SSC estimation experimental ocean-color sensor, moderate resolution wide-wavelength imager onboard Chinese Tiangong 2 Space Lab. The NISSI takes advantage...
Ocean color satellite sensors have become an indispensable component in the Earth Observing System, which use of multiple ocean not only improves spatiotemporal coverage global oceans but also maintains continuity data products for long-term monitoring. In this research, performance a new sensor Chinese Color and Temperature Scanner (COCTS) from HY1C launched September 2018 is thoroughly evaluated with two important aspects: signal-to-noise ratio (SNR) at top atmosphere uncertainty...