yusuke1997/dblp-id-title huggingface dataset:
Retrieval of atmospheric liquid and ice characteristics using dual-wavelength radar observations
Bayesian Wavelet Shrinkage With Heterogeneity-Adaptive Threshold for SAR Image Despeckling Based on Generalized Gamma Distribution
Imaging of Single and Double Scatterers in Urban Areas via SAR Tomography
Pansharpening of Multispectral Images Based on Nonlocal Parameter Optimization
Deep Seismic CS: A Deep Learning Assisted Compressive Sensing for Seismic Data
Collaborative Network for Super-Resolution and Semantic Segmentation of Remote Sensing Images
Three-Dimensional Deformation Monitoring of Urban Infrastructure by Tomographic SAR Using Multitrack TerraSAR-X Data Stacks
EOS MLS cloud ice measurements and cloudy-sky radiative transfer model
RSNet: The Search for Remote Sensing Deep Neural Networks in Recognition Tasks
Accuracy of topographic maps derived from ERS-1 interferometric radar
Retrieval of Soil Salt Content From an Integrated Approach of Combining Inversed Reflectance Model and Regressions: An Experimental Study
Texture-Aware Self-Attention Model for Hyperspectral Tree Species Classification
Hashing-Based Deep Metric Learning for the Classification of Hyperspectral and LiDAR Data
Evaluating Tree Detection and Segmentation Routines on Very High Resolution UAV LiDAR Data
Variational Mode Decomposition for NMR Echo Data Denoising
A Coarse-to-Fine Framework for Cloud Removal in Remote Sensing Image Sequence
Unsupervised Change Detection Based on Hybrid Conditional Random Field Model for High Spatial Resolution Remote Sensing Imagery
The Earth observing system microwave limb sounder (EOS MLS) on the aura Satellite
Effectiveness of 2-D and 2.5-D FDTD Ground-Penetrating Radar Modeling for Bridge-Deck Deterioration Evaluated by 3-D FDTD
Multimodal Fusion Transformer for Remote Sensing Image Classification
Assimilating Ground-Based and High-Dynamic Airborne GNSS Zenith Total Delays Into Numerical Weather Predictions
Microwave backscattering and emission model for grass canopies
Robust Bidirectional Q-Compensated Denoising for Seismic Data With Adaptive Structural Regularization
Improving Component Substitution Pansharpening Through Multivariate Regression of MS +Pan Data
Integrated Dielectric Model for Unconsolidated Porous Media Containing Hydrate
Methodology and Information Content of the NOAA NESDIS Operational Channel Selection for the Cross-Track Infrared Sounder (CrIS)
IRSRMamba: Infrared Image Super-Resolution via Mamba-Based Wavelet Transform Feature Modulation Model
A Framework for Quantifying the Uncertainty in Upscaling Evapotranspiration From Homogeneous to Heterogeneous Underlying Surface
AirGeoNet: A Map-Guided Visual Geo-Localization Approach for Aerial Vehicles
SARCLIP: The First Vision-Language Foundation Model for SAR Image
An Autofocus Approach for UAV-Based Ultrawideband Ultrawidebeam SAR Data With Frequency-Dependent and 2-D Space-Variant Motion Errors
On the retrieving of forest stem volume from VHF SAR data: observation and modeling
Unsupervised PolSAR Image Classification Using Discriminative Clustering
First-Arrival Traveltime Tomography With Near-Surface Structural Regularization
The Mondrian Detection Algorithm for Sonar Imagery
Cubic Phase Distortion and Irregular Degradation on SAR Imaging Due to the Ionosphere
Level Set Algorithm for Shape Reconstruction of Non-Overlapping Three-Dimensional Penetrable Targets
Optimum polarizations in the bistatic scattering from layered random media
Active Learning-Based Optimized Training Library Generation for Object-Oriented Image Classification
Spatial-Spectral Diffusion Contrastive Representation Network for Hyperspectral Image Classification
A Novel CFFBP Algorithm With Noninterpolation Image Merging for Bistatic Forward-Looking SAR Focusing
Feature Decoupling and Nonuniform Knowledge Transfer for Knowledge Distillation in Remote Sensing Image Object Detection
Characterization of fluctuation statistics of radar clutter for Indian terrain
SeaWiFS ocean color data archive and distribution system: assessment of system performance
Bistatic scattering characterization of complex objects
Provenance Capture and Use in a Satellite Data Processing Pipeline
Predicting Sea Ice Concentration With Uncertainty Quantification Using Passive Microwave and Reanalysis Data: A Case Study in Baffin Bay
Uniqueness of multiangular measurements. I. An indicator of subpixel surface heterogeneity from MISR
TCNet: Triple Collocation-Based Network for Ocean Surface Wind Speed Retrieval on CYGNSS
Accurate and efficient determination of the shoreline in ERS-1 SAR images
Hyperspectral Remote Sensing Images Salient Object Detection: The First Benchmark Dataset and Baseline
MR-Selection: A Meta-Reinforcement Learning Approach for Zero-Shot Hyperspectral Band Selection
TSTrack: A Lightweight Transformer-Based Spatiotemporal Feature Refinement Tracking Algorithm
A Novel Approach to the Unsupervised Extraction of Reliable Training Samples From Thematic Products
A Novel Change Detection Method for Multitemporal Hyperspectral Images Based on Binary Hyperspectral Change Vectors
Contour-Aware Dynamic Low-High Frequency Integration for Pan-Sharpening
HyperHeight LiDAR Compressive Sampling and Machine Learning Reconstruction of Forested Landscapes
Characterizing, Mitigating, and Comparing the Along-Scanline Noise in Fengyun-3 Series Microwave Humidity Sounders (MWHSs)
Few-Shot Aerial Image Semantic Segmentation Leveraging Pyramid Correlation Fusion
SAISAR-Net: A Robust Sequential Adjustment ISAR Image Classification Network
MTF-Adjusted Pansharpening Approach Based on Coupled Multiresolution Decompositions
Observations of tropical cyclone structure from WindSat
Downscaling AMSR-2 Soil Moisture Data With Geographically Weighted Area-to-Area Regression Kriging
Statistical Robust Estimation of Spatial Symmetric Transformations Based on Mahalanobis Distance
Seismic Data Enhancement Based on Common-Reflection-Surface-Based Local Slope and Trimmed Mean Filter
A Multilevel Domain Similarity Enhancement Guided Network for Remote Sensing Image Compression
Combining Superresolution and Fusion Methods for Sharpening Misrsat-1 Data
Dispersion Analysis and 3-D Wavefield Modeling of Lattice Boltzmann Model
Extracting Glacier Calving Fronts by Deep Learning: The Benefit of Multispectral, Topographic, and Textural Input Features
Hyperspectral Remote Sensing Image Synthesis Based on Implicit Neural Spectral Mixing Models
Low-grazing-angle microwave scattering from a three-dimensional spilling breaker crest: a numerical investigation
Advancing FRP Retrieval: Bridging Theory and Application
Radar Multiframe Detection in a Complicated Multitarget Environment
Dielectric Constant Estimation of Lunar Surface Using Mini-RF and Chandrayaan-2 SAR Data
Fully Automatic Dark-Spot Detection From SAR Imagery With the Combination of Nonadaptive Weibull Multiplicative Model and Pulse-Coupled Neural Networks
Results of a Space-Surface Bistatic SAR Image Formation Algorithm
ESP-LRSMD: A Two-Step Detector for Ship Detection Using SLC SAR Imagery
The Characterization of Deep Convective Clouds as an Invariant Calibration Target and as a Visible Calibration Technique
Local Semantic Feature Aggregation-Based Transformer for Hyperspectral Image Classification
Regularized Seismic Full Waveform Inversion Using Inverse Scattering Approach and Preconditioned L-BFGS Optimization
SWIM: The First Spaceborne Wave Scatterometer
DualStrip-Net: A Strip-Based Unified Framework for Weakly- and Semi-Supervised Road Segmentation From Satellite Images
On-Orbit Geometric Calibration of ZY-3 Three-Line Array Imagery With Multistrip Data Sets
Reconstruction From Antenna-Transformed Radar Data Using a Time-Domain Reconstruction Method
OS-PC: Combining Feature Representation and 3-D Phase Correlation for Subpixel Optical and SAR Image Registration
Combined Radar-Radiometer Surface Soil Moisture and Roughness Estimation
Design and Fabrication of a Low-Profile Planar Sensor for the Estimation of Plant-Available Water in Different Textured Soils
A ground-based parasitic SAR experiment
Polarimetric processing of coherent random noise radar data for buried object detection
Dual-Clustering-Based Hyperspectral Band Selection by Contextual Analysis
Ground Moving Target Indication in SAR Images With Symmetric Doppler Views
TEA: A Training-Efficient Adapting Framework for Tuning Foundation Models in Remote Sensing
A conceptual model for effective directional emissivity from nonisothermal surfaces
Algebraic Synthesis of Forest Scenarios From Multibaseline PolInSAR Data
Pixel-CRN: A New Machine Learning Approach for Convective Storm Nowcasting
A Novel Near-Land Radiometer Wet Path-Delay Retrieval Algorithm: Application to the Jason-2/OSTM Advanced Microwave Radiometer
Estimating Individual Building Heights by Integrating Spaceborne LiDAR and Multisource Remote Sensing Data: A CNN-Transformer Model and a Semi-Supervised Sample Augmentation Approach
Retrieval of Particle Size of Natural Granite From Multiangular Bidirectional Reflectance Spectra Using the Hapke Model (June 2020)
A new concept on remote sensing of cirrus optical depth and effective ice particle size using strong water vapor absorption channels near 1.38 and 1.88 μm
Remote sensing of suspended sediments and shallow coastal waters
HSIAO Framework in Feature Selection for Hyperspectral Remote Sensing Images Based on Jeffries-Matusita Distance
Multichannel HRWS SAR Imaging Based on Range-Variant Channel Calibration and Multi-Doppler-Direction Restriction Ambiguity Suppression
Scattering-Based Nonlocal Means SAR Despeckling
Fast and Efficient Panchromatic Sharpening
Efficient Fault Surface Grouping in 3-D Seismic Fault Data
Studies Regarding the Ensquared Energy of a Geostationary Hyperspectral Infrared Sounder
A Downscaling Framework for Urban Nighttime Light Based on Multifactor Geographically Neural Network Weighted Regression
Characterizing the dependence of vegetation model parameters on crop structure, incidence angle, and polarization at L-band
Estimating the VIIRS Thermal Emissive Band Response Versus Scan (RVS) and Calibration Offsets Using On-Orbit Pitch Maneuver Data
Deep Multiple Instance Convolutional Neural Networks for Learning Robust Scene Representations
UAV Image Stitching via Global Optimal Seamline Detection and Local Alignment With Seamline Constraint
Wavelet-Based Despeckling of SAR Images Using Gauss-Markov Random Fields
Compressive Pattern Matching on Multispectral Data
A novel lacunarity estimation method applied to SAR image segmentation
Multiangle BSAR Imaging Based on BeiDou-2 Navigation Satellite System: Experiments and Preliminary Results
A Method for Deriving Relative Humidity From MODIS Data Under All-Sky Conditions
Fast Multiparameter Reconstruction of Multicomponent Induction Well-Logging Datum in a Deviated Well in a Horizontally Stratified Anisotropic Formation
Physics-Constrained Bayesian Neural Networks for Aerosol Retrieval From Hyperspectral Satellite Measurements With Integrated Uncertainty Quantification
ABNet: Adaptive Balanced Network for Multiscale Object Detection in Remote Sensing Imagery
Sea-Surface Polarization Ratio From Envisat ASAR AP Data
Effective Anomaly Space for Hyperspectral Anomaly Detection
MCFT: Multimodal Contrastive Fusion Transformer for Classification of Hyperspectral Image and LiDAR Data
Change Detection in Multisource VHR Images via Deep Siamese Convolutional Multiple-Layers Recurrent Neural Network
HLSWI: A Simple Yet Effective Water Index Using Harmonized Landsat-Sentinel-2 Data for Complex Scenarios
Deep Learning for Seismic Data Compression in Distributed Acoustic Sensing
CrCD: Multidirection-MLP-Based Cross-Contrastive Disambiguation for Hyperspectral Image Partial Label Learning
Adaptive Feature Separation Network for Remote Sensing Object Detection
Model-Based Analysis of the Influence of Forest Structures on the Scattering Phase Center at L-Band
The algorithm for MODIS wavelength on-orbit calibration using the SRCA
Computation of Oceanlike Surface Thermal Emission and Bistatic Scattering With the Reduced Local Curvature Approximation
Ocean Color Remote Sensing of Atypical Marine Optical Cases
How Does Multiple Scattering Affect the Spaceborne W-Band Radar Measurements at Ranges Close to and Crossing the Sea-Surface Range?
Leveraging "Night-Day" Calibration Data to Correct Stripe Noise and Vignetting in SDGSAT-1 Nighttime-Light Images
Correction to "Multichannel Azimuth Processing in ScanSAR and TOPS Mode Operation"
Extraction and Three-Dimensional Reconstruction of Isolated Buildings in Urban Scenes From High-Resolution Optical and SAR Spaceborne Images
Ocean Surface Currents Measurement From GEO-LEO Bistatic Along-Track Interferometric SAR: Methods and Optimization
Experimental validation of surface scattering and emission models
Geofluid Discrimination in Stress-Induced Anisotropic Porous Reservoirs Using Seismic AVAZ Inversion
Electromagnetic imaging of underground targets using constrained optimization
Intelligent Missing Shots' Reconstruction Using the Spatial Reciprocity of Green's Function Based on Deep Learning
Infrared Small Target Detection via Diverse Feature Harmonization
Active Object Detection for UAV Remote Sensing via Behavior Cloning and Enhanced Q-Network With Shallow Features
Removal of the MCSST MODIS SST Bias During Upwelling Events Along the Southeastern Coast of Brazil
Using novel fluorescent polymers as sensory materials for above-ground sensing of chemical signature compounds emanating from buried landmines
An ISAR Imaging Method Based on MIMO Technique
Self-Supervised Denoising for Distributed Acoustic Sensing Vertical Seismic Profile Data via Improved Blind Spot Network
Class-Level Prototype Guided Multiscale Feature Learning for Remote Sensing Scene Classification With Limited Labels
Measuring Instantaneous Velocity Fields Remotely Using a 2-D Power Spectral Density Technique
Reanalysis of L-band brightness predicted by the LSP/R model-for prairie grassland: incorporation of rough surface scattering
Preliminary analysis of Shuttle Radar Laboratory (SRL-1) data to study aeolian features and processes
Rover-Mounted Radar Observation of Discrete Layers Within the Top 4 Meters of Regolith at the Chang'E-3 Landing Site, the Moon
TasselNetV3: Explainable Plant Counting With Guided Upsampling and Background Suppression
A new interpolation kernel for SAR interferometric registration
Removal of Powerline Noise in Geophysical Datasets With a Scientific Machine-Learning Based Approach
A model for extremely heterogeneous clutter
Differences Between Collection 4 and 5 MODIS Ice Cloud Optical/Microphysical Products and Their Impact on Radiative Forcing Simulations
A Robust Multispectral Point Cloud Generation Method Based on 3-D Reconstruction From Multispectral Images
Integrating Domain Knowledge in Data-Driven Earth Observation With Process Convolutions
A Spatial-Spectral Adaptive Haze Removal Method for Visible Remote Sensing Images
Polarimetric Calibration of Circularly Polarized Synthetic Aperture Radar Data
A New Method for Reconstructing Absolute Water Vapor Maps From Persistent Scatterer InSAR
Non-Invasive Forest Litter Characterization Using Full-Wave Inversion of Microwave Radar Data
Global Detection, Geolocation, and Analysis of Terrestrial GPS RFI Using Spaceborne GNSS-R Receivers
Potential of Fully Connected Neural Networks for Microphysical Retrieval of Ice Hydrometeors From Dual-Polarization Radar Data
Unsupervised Deep Joint Segmentation of Multitemporal High-Resolution Images
Relationships Between L-Band Brightness Temperature, Backscatter, and Physical Properties of the Ross Ice Shelf Antarctica
Magnetic models of unexploded ordnance
Permittivity Characterization of Chang'E-5 Lunar Regolith Using In Situ Ground-Penetrating Radar Measurements
A standoff, focused-beam land mine radar
Improved GEDI Canopy Height Extraction Based on a Simulated Ground Echo in Topographically Undulating Areas
Aerosol Retrieval in the Autumn and Winter From the Red and 2.12~µm Bands of MODIS
Integrating SAM With Feature Interaction for Remote Sensing Change Detection
Analysis of the distorted Born approximation for subsurface reconstruction: truncation and uncertainties effects
Marine Electrical Sensing for Detecting Small Inhomogeneities
Polarimetric SAR Despeckling With Convolutional Neural Networks
Automatic Fuzzy Clustering Using Modified Differential Evolution for Image Classification
Uncertainty of Pure Rotational Raman-Rayleigh LiDAR for Temperature Measurement in Middle-to-Upper Atmosphere: Simulation Method
Using Terrestrial Laser Scanning Data to Unsupervised Segment Broadleaved Tree and Estimate Leaf Area
Tensor-Based Robust Principal Component Analysis With Locality Preserving Graph and Frontal Slice Sparsity for Hyperspectral Image Classification
DLC: Dynamic Loss Correction for Cross-Domain Remotely Sensed Segmentation
High-Resolution Airborne Polarimetric Microwave Imaging of Snow Cover During the NASA Cold Land Processes Experiment
Efficient Grounding DINO: Efficient Cross-Modality Fusion and Efficient Label Assignment for Visual Grounding in Remote Sensing
NT-Net: A Semantic Segmentation Network for Extracting Lake Water Bodies From Optical Remote Sensing Images Based on Transformer
Marine Quasi-Geoid Enhancement From SWOT Wide-Swath Data and Its Mapping of Mean Dynamic Topography Over Island Areas
Development of an evapotranspiration index from Aqua/MODIS for monitoring surface moisture status
Three-Dimensional Unstructured Finite Element Modeling of Magnetotelluric Problems Allowing for Continuous Variation of Conductivity in Each Block
Statistical Sample Selection and Multivariate Knowledge Mining for Lightweight Detectors in Remote Sensing Imagery
Two-Step Accuracy Improvement of Motion Compensation for Airborne SAR With Ultrahigh Resolution and Wide Swath
An improved geometrical optics model for bistatic GPS scattering from the ocean surface
Rough-sea microwave emissivities measured with the SSM/I
Extracting Bird and Insect Migration Echoes From Single-Polarization Weather Radar Data Using Semi-Supervised Learning
Assessment of the Potential of H/A/Alpha Decomposition for Polarimetric Interferometric SAR Data
Reflection profiling of Arctic lake ice using microwave FM-CW radar
Estimate of the subglacier dielectric constant of an ice shelf using a ground-penetrating step-frequency radar
Tropical-Forest-Parameter Estimation by Means of Pol-InSAR: The INDREX-II Campaign
Tropical Cyclone Intensity Estimated From Wide-Swath SAR Images
Corrections to "Deep Recurrent Neural Networks for Hyperspectral Image Classification"
A Glimpse of Ocean Color Remote Sensing From Moon-Based Earth Observations
Three-Component Sparse S Transform
Edge and Corner Awareness-Based Spatial-Temporal Tensor Model for Infrared Small-Target Detection
Unsupervised Pose Decoder: Learn to Disentangle the Pose Attribute for Point Cloud Shape Analysis
CFIFNet: A Road Extraction Network Through Cross-Modal Frequency-Domain Interaction and Fusion From High-Resolution Remote Sensing Image and GPS Trajectory/LiDAR
Linear spectral random mixture analysis for hyperspectral imagery
Toward a Trustworthy Classifier With Deep CNN: Uncertainty Estimation Meets Hyperspectral Image
A Manifold Alignment Approach for Hyperspectral Image Visualization With Natural Color
A Joint Inversion Algorithm for the Establishment of High-Accuracy 3-D Marine Gravity Field
FengYun-3 B Satellite Medium Resolution Spectral Imager Visible On-Board Calibrator Radiometric Output Degradation Analysis
Evaluation of hurricane ocean vector winds from WindSat
Spectral-Density-Based Graph Construction Techniques for Hyperspectral Image Analysis
Spatial-Spectral Attention Network Guided With Change Magnitude Image for Land Cover Change Detection Using Remote Sensing Images
Improving the Spatial Resolution of Landsat TM/ETM+ Through Fusion With SPOT5 Images via Learning-Based Super-Resolution
Hyperspectral Image Classification via Compressive Sensing
Physical Optics Curved-Boundary Dielectric Plate Scattering Formulas for an Accurate and Efficient Electromagnetic Characterization of a Class of Natural Targets
Transcending Pixels: Boosting Saliency Detection via Scene Understanding From Aerial Imagery
PnP-Based Ground Moving Target Imaging Network for Squint SAR and Sparse Sampling
Detail Injection-Based Deep Convolutional Neural Networks for Pansharpening
Retrieval of Effective Leaf Area Index in Heterogeneous Forests With Terrestrial Laser Scanning
Spatially Variant Filtering Network Based on Generalized Optimal Constraints for Sidelobe Suppression in SAR Images
Dual polarized staggered PRT scheme for weather radars: analysis and applications
Toward the Detection and Imaging of Ocean Microplastics With a Spaceborne Radar
Satellite Retrievals of Arctic and Equatorial Rain and Snowfall Rates Using Millimeter Wavelengths
Local Constraint-Based Sparse Manifold Hypergraph Learning for Dimensionality Reduction of Hyperspectral Image
ATCM: Aerial-Terrestrial LiDAR-Based Collaborative Simultaneous Localization and Mapping
GraphMamba: An Efficient Graph Structure Learning Vision Mamba for Hyperspectral Image Classification
A Joint Siamese Attention-Aware Network for Vehicle Object Tracking in Satellite Videos
Haze detection and removal in high resolution satellite image with wavelet analysis
An Evaluation of the Chinese HY-2B Satellite's Microwave Scatterometer Instrument
Estimating 250-m Land Surface and Atmospheric Variables From MERSI Top-of-Atmosphere Reflectance
Object Detection in High Resolution Remote Sensing Imagery Based on Convolutional Neural Networks With Suitable Object Scale Features
Biophysical forest type characterization in the Colombian Amazon by airborne polarimetric SAR
A Variational Stereo Method for the Three-Dimensional Reconstruction of Ocean Waves
A Transformer-Based Roof Plane Segmentation Approach for Airborne LiDAR Point Clouds
GFHMP: Gradual Fusion Framework of Hyperspectral, Multispectral, and Panchromatic Images Using a Novel Spatial-Spectral Cross-Fusion Network
Full Semantic Constructed Network for Urban Use Classification From Very High-Resolution Optical Remote Sensing Imagery
Scattering of GPS signals from the ocean with wind remote sensing application
Comment on "Uncertainties in the Temperature Dependence of the Line-Coupling Parameters of the Microwave Oxygen Band: Impact Study"
A Nonlinear Harmonic Model for Fitting Satellite Image Time Series: Analysis and Prediction of Land Cover Dynamics
Multisource Collaborative Domain Generalization for Cross-Scene Remote Sensing Image Classification
LaMIE: Large-Dimensional Multipass InSAR Phase Estimation for Distributed Scatterers
Full-Polarization Target Classification Using Single-Polarization Ground Penetrating Radars
MVP: Meta Visual Prompt Tuning for Few-Shot Remote Sensing Image Scene Classification
Deep Learning-Based Homogeneous Pixel Selection for Multitemporal SAR Interferometry
A New Machine-Learning-Based Calibration Scheme for MODIS Thermal Infrared Water Vapor Product Using BPNN, GBDT, GRNN, KNN, MLPNN, RF, and XGBoost
Observing System Simulation of Snow Microwave Emissions Over Data Sparse Regions - Part I: Single Layer Physics
Mean-Shift-Based Speckle Filtering of Polarimetric SAR Data
A Back Propagation Neural Network-Based Algorithm for Retrieving All-Weather Precipitable Water Vapor From MODIS NIR Measurements
Retrieval of atmospheric and surface parameters from satellite microwave radiometers over the Mediterranean Sea
SOM-Net: Unrolling the Subspace-Based Optimization for Solving Full-Wave Inverse Scattering Problems
From Seismic Wave Simulation to Mechanics Computation: A New Numerical Method for Infinite-Domain Stress Modeling
Simulation and SMAP Observation of Sun-Glint Over the Land Surface at the L-Band
Uncertain Category-Aware Fusion Network for Hyperspectral and LiDAR Joint Classification
Seismic Random Noise Suppression Model Based on Downsampling and Superresolution
A Sparse Oblique-Manifold Nonnegative Matrix Factorization for Hyperspectral Unmixing
Orthogonal Subspace Projection Using Data Sphering and Low-Rank and Sparse Matrix Decomposition for Hyperspectral Target Detection
Impact of Initialization on Design of Endmember Extraction Algorithms
Adaptive Attenuation Correction Techniques for C-Band Polarimetric Weather Radars