A5050166189- Calibration and Measurement Techniques
- Infrared Target Detection Methodologies
- Advanced Algorithms and Applications
- Atmospheric and Environmental Gas Dynamics
- Astronomical Observations and Instrumentation
- Satellite Image Processing and Photogrammetry
- Advanced Image and Video Retrieval Techniques
- Advanced Sensor and Control Systems
- Adaptive optics and wavefront sensing
- Meteorological Phenomena and Simulations
- Climate variability and models
- Algorithms and Data Compression
- Atmospheric Ozone and Climate
- Advanced Data Compression Techniques
- Robotics and Sensor-Based Localization
- Optical Systems and Laser Technology
- Wireless Sensor Networks and IoT
- Urban Heat Island Mitigation
- Planetary Science and Exploration
- Advanced Wireless Communication Techniques
- Advanced Image Fusion Techniques
- Radiation Effects in Electronics
- Power Line Communications and Noise
- CCD and CMOS Imaging Sensors
- Advanced Measurement and Metrology Techniques
Shanghai Institute of Technical Physics
2012-2025
Chinese Academy of Sciences
2012-2025
State Key Laboratory of Infrared Physics
2025
Radiometric Calibration (RC) is a critical process in aerospace infrared remote sensing that establishes the relationship between radiation energy of observed objects and Digital Number (DN) output from sensors, which fundamental for ensuring high-precision applications data. At present, Source-Based RC (SBRC) predominant method, relying on variety Sources (RS) including in-orbit blackbodies, or natural targets such as lakes, oceans. This approach, while effective, imposes constraints...
Abstract The level‐1 (L1) radiance spectra from the first Geostationary Interferometric InfraRed Sounder (GIIRS) have been publicly available since January 2019. On account of inherent observation characteristics, operation modes, and capabilities, a complete spectrum calibration method GIIRS/L1 products is originally proposed to form latest version (V3) algorithm for implementation. Particularly, four targeted improvements in three aspects are independently established: subsample location...
In our study, a retrieval method of temperature profiles is proposed which combines an improved one-dimensional variational algorithm (1D-Var) and artificial neural network (ANN), using FY-4A/GIIRS (Geosynchronous Interferometric Infrared Sounder) infrared hyperspectral data. First, according to the characteristics observation data conventional 1D-Var, we introduced channel blacklists discarded channels that have large negative impact on retrieval, then used information capacity for...
To measure the global atmospheric three-dimensional distribution and change of temperature humidity is one key areas in remote sensing detection; it also a new research development direction field meteorological satellite application. As main element China second generation geostationary Fengyun 4 (FY-4), which was launched on Dec. 11, 2016, Geostationary Interferometric Infrared Sounder (GIIRS) first interferometric infrared sounder working orbit internationally. It used for vertical...
To better cope with the significant nonlinear radiation distortions (NRD) and severe rotational in multi-modal remote sensing image matching, this paper introduces a rotationally robust feature-matching method based on maximum index map (MIM) 2D matrix, which is called rotation-invariant local phase orientation histogram (RI-LPOH). First, feature detection performed weighted moment equation. Then, matrix MIM modified gradient location (GLOH) constructed invariance achieved by cyclic shifting...
FY-4A/GIIRS (Geosynchronous Interferometric Infrared Sounder) is the first infrared hyperspectral atmospheric vertical detector in geostationary orbit. Compared to other similar instruments, it has advantages of high temporal resolution and stationary relative ground. Based on characteristics GIIRS observation data, we proposed a humidity profile retrieval method. We fully utilized information provided by forecast used two-dimensional brightness temperature data with dimension time optical...
Highly emissive spaceborne blackbody radiation sources are important devices for infrared value traceability by providing accurate to calibrate load. To meet the needs of calibration accuracy needed remote sensing, this paper proposes a highly that uses cubic reflection and an absorption method based on light capture. An emissivity simulation ray tracing was carried out. The influences specular (SR), near (NSR), diffuse (DR) were analyzed. Two blackbodies with NSR DR fabricated, simulated,...
Abstract Radiometric Calibration (RC) is a key step in high-precision aerospace infrared remote sensing. Currently, source-based RC the most prevailing methodologies, where radiometric source such as blackbody with known radiation energy observed by sensor and corresponding output digital number recorded. However, methodology limited several constraints, e.g., space weight requirement for in-orbit blackbodies, lack of uniformity ideal properties blackbodies. This paper presents new...
A compact and miniaturized laser collimation system was proposed to measure the four-degrees-of-freedom of an optical payload in high-altitude space. Compared with other systems, this has a simple structure low cost, high measurement accuracy, large range. The designed, principle four-degree-of-freedom described detail, interference between distance angle path analyzed, installation error analyzed. minimized under different temperature conditions improve robustness system. An engineering...
The performance of the Advanced Geosynchronous Radiation Imager (AGRI) onboard Fengyun-4 (FY-4) satellite was evaluated. results showed that its has approached international advanced level similar instruments. A wavelet filter designed to striping noises AGRI, which come from inconsistency spectrum and thus varies with observed target. non-uniformity whole image evaluated by weighting probability variance count values. After filtering, infrared AGRI had a uniform visual effect on single...
As the improvement of SRAM-based FPGA's production technology, number gates has reached 10 million-scale, it becomes more powerful, increasingly used in space field. Due to impact radiation, SRAM FPGA couldn't always be stable for applications, needs strengthen reliability. High reliable spaceborne reconfiguration system is designed ensure correct operation onboard. The can achieve three functions: first, reconfiguring using external PROM or E <sup...
Data from the Geostationary Interferometric Infrared Sounder (GIIRS) is critical in domain of meteorological research. Due to limitations communications bandwidth, methods compress data captured by this instrument are mandatory. This paper mainly focused on near lossless compression for interferogram data. According definition it, a norm with different thresholds put forward qualifying algorithm. Subsequently, authors propose and describe scheme based decimation quantization, then employ...
This paper briefly described an improved method for the original proposed scheme based on Vector Quantization and Linear Prediction to further enhance compression ratio while reduce time cost. Given fact that interferograms belong same datacube are similar each other, there two obvious modifications in this paper: predict only once get general predicted coefficients datacube; along with treat rather than sequence as encoded unit. The consumption spent by part will shrink about 35.55%...
To improve the positioning accuracy of three-axis-stabilized geostationary meteorological satellite (GSMS) images, we developed a geometric precision correction process based on landmarks. For problem that GSMS images and binary landmark are difficult to match accurately, made full use local global spatial information image pairs proposed dual-threshold matching algorithm misalignment matrix screen initial results generated by maximum normalized cross correlation. Under premise ensuring...
SpaceWire is used on FY4 meteorological satellite as on-board data-handling network. Based SpaceWire, this paper provides a design using two FPGAs and AT7911 chips for the dual-channel data processing of payload to ensure that can be transported efficiently reliably. This has proved feasible when tested ground.
As a main element of China second generation geostationary meteorological satellite Fengyun 4B (FY-4B), which was launched on Jun. 03, 2021, the Geostationary High-speed Imager (GHI) is first round clock high-frequency imaging instrument working international geo-stationary orbit. It can continuously observant and imagine for 2000km×2000km regions with spatial resolution up to 250m in 1 minute interval. The challenge GHI thermal design that sun intrusion optic system would induce...