Lars Ulander
Lars Ulander is professor in radar remote sensing. His research is focused on radar, in particular signal and data processing for synthetic aperture radar (SAR) in different applications. His research has resulted in new radar systems and new knowledge about SAR and ground imaging in the VHF and UHF bands. He is one of the proposers for the BIOMASS satellite mission which is under development by the European Space Agency (ESA). The objective of BIOMASS is to produce yearly global maps of forest biomass. It will be the first SAR satellite operating in the UHF-band (432-438 MHz) with launch scheduled for 2024. He also leads the research with BorealScat which investigates how radar reflectivity from boreal forests is affected by weather and moisture parameters. BorealScat uses a tomographic radar installed on a 50-m high tower (read more at www.borealscat.se).
Showing 190 publications
Factorized Geometrical Autofocus for UWB UHF-band SAR with a GPS-supported Linear Track Model
Bistatic noise radar: Demonstration of correlation noise suppression
THE TOMOSENSE EXPERIMENT: MONO- AND BISTATIC SAR TOMOGRAPHY OF FORESTED AREAS AT P-, L-, AND C-BAND
TOWER-BASED RADAR FOR MONITORING A BOREAL FOREST: MEASUREMENT PERFORMANCE AND DESIGN TRADE-OFFS
Temporal Characteristics of P-band Tomographic Radar Backscatter of a Boreal Forest
Biomass Level-2 Products - Part II: Processing Schemes and AGB Estimation Results from Campaign Data
Mapping tree height in burkina faso parklands with tandem-x
BIOMASS LEVEL-2 PRODUCTS - PART I: RATIONALE AND APPLICATIONS
Evaluating P-Band TomoSAR for Biomass Retrieval in Boreal Forest
Interferometric Ground Cancellation for Above Ground Biomass Estimation
National Forest Biomass Mapping Using the Two-Level Model
Factorized Geometrical Autofocus at UHF-band
Calibration of a Ground-Based Array Radar for Tomographic Imaging of Natural Media
USING THE TWO-LEVEL MODEL WITH TANDEM-X FOR LARGE-SCALE FOREST MAPPING
BIOMASS L2 Prototype Processor : Current Status
Measurements of Sea Surface Currents in the Baltic Sea Region Using Spaceborne Along-Track InSAR
Airborne SAR for Calibration of P-Band Tower Radar
On the Sensitivity of TanDEM-X-Observations to Boreal Forest Structure
SAR Processing Without a Motion Measurement System
Using Sentinel-1 Ocean Data for Mapping Sea Surface Currents Along the Southern Norwegian Coast
The European Space Agency BIOMASS mission: Measuring forest above-ground biomass from space
Wind direction ambiguity removal using along-track InSAR: A case study
THE BIOMASS MISSION: OBJECTIVES AND REQUIREMENTS
SAR processing UWB VHF data without a motion measurement system
Evaluating spaceborne L-band pol tomo SAR for forest biomass retrieval based on airborne SAR data
MODEL-BASED ESTIMATION OF TROPICAL FOREST BIOMASS FROM NOTCH FILTERED P-BAND SAR BACKSCATTER
National forest mapping of stem volume using TanDEM-X
Forest Biomass Retrieval from L-Band SAR Using Tomographic Ground Backscatter Removal
Unveiling the Complex Structure of Tasmanian Temperate Forests with Model-Based Tandem-X Tomography
LONG-TERM P-BAND TOMOSAR OBSERVATIONS FROM THE BOREALSCAT TOWER EXPERIMENT
Temporal survey of P- A nd L-band polarimetric backscatter in boreal forests
Multiport vector network analyzer radar for tomographic forest scattering measurements
Interferometric Ground Notching of SAR Images for Estimating Forest Above Ground Biomass
Modeling and Detection of Deforestation and Forest Growth in Multitemporal TanDEM-X Data
Mapping and modeling of boreal forest change in TanDEM-X data with the two-level model
Simultaneous passive SAR imaging and detection of airborne targets
Measurements of forest biomass change using L- and P-band SAR backscatter
Airborne passive SAR imaging based on DVB-T signals
Phase calibration of TanDEM-X ATI-SAR data for sea surface velocity measurements
Passive synthetic-aperture radar for detection of ground vehicles
Analysis of a ground target deployment in an airborne passive SAR experiment
Time series of P- and L-band forest backscatter from BorealScat
SAR processing without a motion measurement system
Experiences from large-scale forest mapping of Sweden using TanDEM-X data
Testing C-band convoy mission for forest monitoring
Simulated biomass retrieval from the spaceborne tomographic Saocom-CS mission at L-band
Estimation of Forest Stem Volume using ALOS-2 PALSAR-2 Satellite Images
An Efficient Solution to the Factorized Geometrical Autofocus Problem
Wind-wave effect on ATI-SAR measurements of ocean surface currents in the Baltic Sea
Factorized Geometrical Autofocus: On the geometry search
Mono- and Bistatic UHF-Band SAR Measurements of a Hemi-Boreal Forest
A polarimetric model of topographic effects on P-band forest backscatter
Detection of Thinning and Clear-Cuts using TanDEM-X Data
Estimation of Forest Biomass From Two-Level Model Inversion of Single-Pass InSAR Data
Estimation of Forest Height and Canopy Density From a Single InSAR Correlation Coefficient
Forest Biomass Retrieval from BioSAR 2010 P-band SAR Data using a Regression-Based Model
VHF/UHF bistatic and passive SAR ground imaging
Measurements of Forest Biomass Change Using P-Band Synthetic Aperture Radar Backscatter
Suppression of Clutter in Multichannel SAR GMTI
Factorized Geometrical Autofocus for Synthetic Aperture Radar Processing
Impulse response function for ultra-wideband SAR
Polarimetric-interferometric boreal forest scattering model for BIOMASS end-to-end simulator
Autofocus and analysis of geometrical errors within the framework of fast factorized back-projection
P-band Polarimetric Model of Vertical Tree Stems on Sloping Ground
Estimation of Boreal Forest Biomass from Two-Level Model Inversion of Interfermetric TanDEM-X Data
Retrieval and Quality Assessment of Wind Velocity Vectors on the Ocean With C-Band SAR
Two-Level Forest Model Inversion of Interferometric TanDEM-X Data
Digital Canopy Model Estimation from TanDEM-X Interferometry using High-Resolution Lidar DEM
Modelling of TanDEM-X Measured Forest Height from Small Footprint Lidar Data
Model-Based Biomass Estimation of a Hemi-Boreal Forest from Multitemporal TanDEM-X Acquisitions
Boreal Forest Biomass Mapping with P-band SAR Backscatter
Estimation of forest variables using TanDEM-X data in combination with a high resolution DEM
Biomass retrieval of boreal forest for the satellite P-band synthetic-aperture radar BIOMASS
Forest biomass and the science of inventory from space
The science and measurement concepts underlying the BIOMASS mission
The BIOMASS mission retrieval algorithms: Results from recent campaigns
BIOMASS end-to-end mission performance assessment
Measurements of forest change using P-band SAR backscatter
Impact and modeling of topographic effects on P-band SAR backscatter from boreal forests
BIOSAR 2010 - A SAR campaign in support to the BIOMASS mission
BIOMASS End-to-End performance Simulator
A Hybrid Model for Polarimetric and Interferometric P-band SAR Modelling of Forests
L- and P-band backscatter intensity for biomass retrieval in hemiboreal forest
The BIOMASS mission: Mapping global forest biomass to better understand the terrestrial carbon cycle
Parametric and non-parametric forest biomass estimation from PolInSAR data
Biomass Retrieval Algorithm Based on P-band BioSAR Experiments of Boreal Forest
Retrieval and assessment of sub-mesoscalewind velocity vectors with Synthetic Aperture Radar
RFI Suppression In Ultrawideband SAR Using Adaptive Line Enhancer
Detection of Moving Targets by Focusing in UWB SAR-Theory and Experimental Results
Clear-Cut Detection in Swedish Boreal Forest Using Multi-Temporal ALOS PALSAR Backscatter Data
Fast Factorized Back-Projection for Bistatic SAR Processing
The BIOMASS mission – an ESA Earth Explorer candidate to measure the biomass of the Earth’s forests
K&C Science Report – Phase 1, Detection of deforestation in Swedish forest
Topographic Correction for Biomass Retrieval from P-band SAR Data in Boreal Forests
Design of Optimum Weighting Functions for LFM Signals
Investigations on forestry applications in Sweden using ALOS PALSAR
Signatures of ALOS PALSAR L-Band Backscatter in Swedish Forest
Evaluating VHF-Band SAR Autofocus Algorithms using a Forest Backscatter Model
Comparison of L- and P-band biomass retrievals based on backscatter from the BioSAR campaign
Measurements of Faraday Rotation Using Polarimetric PALSAR Images
Mapping and monitoring clear-cuts in Swedish forest using ALOS PALSAR satellite images
Swiss Airborne Monostatic and Bistatic Dual-Pol SAR Experiment at the VHF-Band
First Results on VHF-band SAR Imaging using Circular Tracks
First results from a bistatic VHF SAR experiment
ALOS PALSAR calibration and validation activities in Sweden
Review of polarimetric indicators for forest characterisation over several sites
Modeling of change detection in VHF- and UHF-band SAR
Detection of clear-cuts using ALOS PALSAR satellite images
Bistatic Experiment with Ultra-Wideband VHF-band Synthetic-Aperture Radar
Validating backscatter models for CARABAS SAR images of coniferous forests
Effects of Forest Biomass and Stand Consolidation on P-Band Backscatter
Topographic and Number Density Effects in Forest Observations with P-band SAR
Faraday rotation measured in polarimetric PALSAR images compared with theoretical expectations
Stem volume estimation for boreal forest using ALOS PALSAR
Estimation of forest stem volume using ALOS PALSAR satellite images
Bistatic VHF and UHF SAR for urban environments
Detection of forest changes using ALOS PALSAR satellite images
ALOS PALSAR Calibration and Validation Results from Sweden
Mapping of Wind-Thrown Forests Using VHF/UHF SAR Images
Automatic Detection of Wind-Thrown Forest in VHF SAR Images
ALOS Calibration and Validation Activities in Sweden
Fast Factorised Backprojection Algorithm for Processing of Microwave SAR Data
Bistatic clutter suppression in low-frequency SAR
VHF/UHF Ultra-Wideband SAR Measurements of Forests
A challenge problem for detection of targets in foliage
Mapping of wind-thrown forests using the VHF-band CARABAS-II SAR
LORAM - A SAR/GMTI Data Collection Campaign
Multi-pass and multi-date at P and L bands: Ground penetration and change detection
Fast Factorised Backprojection Algorithm for Processing of SAR Data
Radar experiment addressing ground target detection based on VHF SAR data
Remote Sensing at the Department of Radio and Space Science, Chalmers University of Technology
LORA - a new airborne imaging radar sensor
Mapping and monitoring forest stem volume using CARABAS
Measurements at tree level using CARABAS-II
Employing UAVs to augment ISR capabilities
Bistatic ultra-wideband SAR for imaging of ground targets under foliage
Measurements on individual trees using multiple VHF SAR images
Low VHF-band backscatter from coniferous forests on sloping terrain
Bistatic SAR simulations for imaging of ground targets under foliage
Mapping of Wind-thrown Forests in Southern Sweden Using Space- and Airborne SAR
SAS processing using a polar version of fast factorised back-projection
Applications of Low-Frequency SAR: Final Project Report, ESA Contract No. 16115/02/NL/MM
Fast back-projection SAR processing using precision interpolation kernels
Combining various ISR assets to create a common and complete ground picture
VHF-band SAR for detection of concealed ground targets
Automatic Segmentation of Multiple VHF-Band SAR Images to Improve Stem Volume Retrieval
Simulation of a Spaceborne Low-Frequency SAR for Global Biomass Assessment
Performance of VHF-band SAR change detection for wide-area surveilllance of concealed ground targets
Performance Simulation of Spaceborne P-Band SAR for Global Biomass Retrieval
Estimation of Forest Stem Volume in Sloping Terrain Using CARABAS-II VHF SAR Data
Stem volume retrieval at stand level using multiple low-frequency SAR images
Synthetic-aperture radar processing using fast factorized back-projection
A production line for forest stem volume measurements from VHF SAR data
Forest stem volume estimation using high-resolution lidar and SAR data
Simulations of Ground Moving Target Indication in an Ultra-Wideband and Wide-Beam SAR System
Jammer Suppresson in an Ultra-Wideband and Widebeam SAR System
RCS of dipoles used for SAR calibration
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Showing 27 research projects
Relating tree water content and satellite SAR data in boreal forests
Measuring forest vitality with radar remote sensing
Satellite observations of submesoscale ocean surface dynamics
Kan granbarkborreangrepp på skog upptäckas i tidsserier med radarmätningar?
Mark- och trädfuktighet och deras inverkan på radarsignalen från skog
L-and P-band Tomography Synergies
Compact and High-Performance SAR on Autonomous Aircraft
BIOMASS level 2 implementation study
Forest biomass and biomass change with spaceborne SAR
Tower-based radar and geophysical measurements during the BorealScat experiment
C-band Convoy Satellite Campaign
Weather Station for Time Series Analysis of Radar Scattering from Forests
Tower for Time Series Analysis of Radar Measurements
Understanding ocean surface dynamics with satelite data
Retrival of forest biomass and biomass change with spaceborn SAR
TangoSat – Study of L- and P-band SAR Tomography Synergies
Radar remote sensing of sea ice in the Polar regions
3D Forest Parameter Retrieval from TanDEM-X Interferometry
Retrieval of wind with spaceborne SAR for polar oceans and coastal regions
Retrieval of forest biomass and biomass change with spaceborne SAR
3D Forest Parameter Retrival from Tandem-X Interferometry
Measurements of sea surface currents to benefit Swedish GMES marine core services