Per Knudsen

Publications

• Coastal marine gravity modelling from satellite altimetry - Case study in the Mediterranean
• A Novel Robust Approach for Correspondence-Free Extrinsic Calibration
• Spectrally Consistent Mean Dynamic Topography by Combining Mean Sea Surface and Global Geopotential Model Through a Least Squares-Based Approach
• Coastal communities and climate change – addressing needs for capacity building and collaboration
• Ultra-Tightly Coupled GNSS/INS for small UAVs
• Multi-Mission Based River Levels
• Marine Gravity Field Mapping from Altimetry – Advancement with 2nd Generation Altimeters
• The Geomed2 Combined Geoid Model
• Towards a Regional Assessment of Coastal Flood Risk: A review of Methods Applied in Norway, Sweden, Finland, Denmark, and Germany
• Determining Storm Surge Return Periods: The Use of Evidence of Historic Events
• Climate Impacts and Adaptation; Towards Local Solutions to Global Challenges
• Towards a Regional Assessment of Coastal Flood Risk: A review of Methods Applied in Norway, Sweden, Finland, Denmark, and Germany
• Accurate Fiducial Mapping For Pose Estimation Using Manifold Optimization
• The DTU17 Global Marine Gravity Field: First Validation Results
• Gyroscope Aided Video Stabilization Using Nonlinear Regression on Special Orthogonal Group
• Multistate Constrained Invariant Kalman Filter for Rolling Shutter Camera and Imu Calibration
• Global sea-level budget and ocean-mass budget, with a focus on advanced data products and uncertainty characterisation
• 1872
• Toward high-quality magnetic data survey using UAV: development of a magnetic-isolated vision-based positioning system
• A new ocean mean dynamic topography model, derived from a combination of gravity, altimetry and drifter velocity data
• Altimetry for the future: Building on 25 years of progress
• Transcending sectors – pooling visions and surging ahead
• The performance and potentials of the CryoSat-2 SAR and SARIn modes for lake level estimation
• Coastal Hazards and Integration of Impacts on Local Adaptation Planning
• Determining Storm Surge Return Periods: The Use of Evidence of Historic Events
• Advancing Sentinel-1 use in Coastal Climate Impact Assessments and Adaptation – A Case Study from the Danish North Sea
• Advancing Sentinel-1 use in Coastal Climate Impact Assessments and Adaptation – A Case Study from the Danish North Sea
• Global gravity field from recent satellites (DTU15) - Arctic improvements
• Monitoring Riverscapes with Unmanned Airborne Vehicles
• Rethinking Coastal Community Approaches to Climate Change Impacts and Adaptation
• Improving the Coastal Mean Dynamic Topography by Geodetic Combination of Tide Gauge and Satellite Altimetry
• Global Sea Level Budget Assessment: Preliminary Results From ESA's CCI Sea Level Budget Closure Project
• A New DTU18 MSS Mean Sea Surface – Improvement from SAR Altimetry
• A New OGMOC Mean Dynamic Topography Model – DTU17MDT
• Final Results from GOCE++ Dynamical Coastal Topography and Tide Gauge Unification Using Altimetry and GOCE.
• A Combined Mean Dynamic Topography Model – DTU17cMDT
• GOCE User Toolbox and Tutorial
• Accelerating changes in ice mass within Greenland, and the ice sheet's sensitivity to atmospheric forcing
• Trajectory Generation Using Semidefinite Programming For Multi-Rotors
• GEOMED2: High-Resolution Geoid of the Mediterranean
• Evaluation of the Global Altimetric Marine Gravity Field DTU15: Using Marine Gravity and GOCE Satellite Gravity
• Towards a dynamic reference frame in Iceland
• SEASTAR: A Mission to Study Ocean Submesoscale Dynamics and Small-Scale Atmosphere-Ocean Processes in Coastal, Shelf and Polar Seas
• Sea Level Trends and Variability of the Baltic Sea From 2D Statistical Reconstruction and Altimetry
• Calibration of Extrinsic Transformation Using Manifold Optimization
• Global and Regional Evaluation of the First Year of Sentinel-3
• Global Sea Level Budget and Ocean Mass Budget, with Focus on New Data Products and Uncertainty Characterization.
• Arctic Sea Level Budget Assessment during the GRACE/Argo Time Period
• Vision-Aided State Estimator for Positioning UAVs
• Large-scale rain gauge network optimization using a kriging emulator
• Geodetic measurements reveal similarities between post–Last Glacial Maximum and present-day mass loss from the Greenland ice sheet
• Sea Extremes: Integrated impact assessment in coastal climate adaptation
• Arctic Sea Level Change over the altimetry era and reconstructed over the last 60 years
• Sentinel-3 First look for Coastal Applications – Initial comparison with Cryosat-2 in the North Sea
• The DTU15 MSS (Mean Sea Surface) and DTU15LAT (Lowest Astronomical Tide) reference surface
• Coastal Hazards and Integration of Impacts in Local Adaptation Planning
• Advancing Coastal Climate Adaptation in Denmark by Land Subsidence Mapping using Sentinel-1 Satellite Imagery
• Improved inland water levels from SAR altimetry using novel empirical and physical retrackers
• An Extreme Event as a Game Changer in Coastal Erosion Management
• Spatial variation in extreme water levels in the Baltic Sea – North Sea transition from tide gauge records
• The Multiple Waveform Persistent Peak (MWaPP) Retracker for SAR waveforms
• Vertikale Landbevægelser - Nye Data Til Effektiv Forvaltning
• Impact assessment and coastal climate change adaptation in a local transdisciplinary perspective
• The legacy of extreme sea levels for the assessment of future coastal flood risk – A review of methods applied in Denmark, Germany and Norway
• Combining SAMOSA-3 and empirical retrackers for inland water height determination
• Improved representations of the Mediterranean Geoid within the GEOMED 2 project. Contributions of local gravity, GOCE and Cryosat2 data
• LOTUS— Preparing Sentinel-3 SAR Altimetry Processing for Ocean and Land
• Low-cost GNSS sampler based on the beaglebone black SBC
• Are there low-cost and low-weight options for GNSS IF storage?
• CryoSat-2 altimetry for river level monitoring - Evaluation in the Ganges-Brahmaputra River basin
• LOTUS— Preparing Sentinel-3 Ocean and Land SAR Altimetry Processing for Copernicus
• An Improved 20-Year Arctic Ocean Altimetric Sea Level Data Record
• GOCE Data for Local Geoid Enhancement
• Improved sea level record over the satellite altimetry era (1993-2010) from the Climate Change Initiative project
• Coastal flooding in Denmark – future outlook
• Arctic sea level change over the past 2 decades from GRACE gradiometry and multi-mission satellite altimetry
• Danmarks bevægelser har konsekvenser
• Coastal Flooding Hazards due to storm surges and subsidence
• Flooding hazards from sea extremes and subsidence
• Software-Defined GPS Receiver Implemented on the Parallella-16 Board
• Data Use and Complexity in Coastal Climate Adaptation and Planning
• Water levels of lakes and Rivers observed from space
• Combining sea state and land subsidence rates in an assessment of flooding hazards at the Danish North Sea coast
• Coastal Erosion and Flooding Hazards on the North Sea Coast at Thyboron, Denmark
• Assessing Future Flood Hazards for Adaptation Planning in a Northern European Coastal Community
• LOTUS— Preparing Sentinel-3 SAR Altimetry Processing for Ocean and Land
• The DTU13 MSS (Mean Sea Surface) and MDT (Mean Dynamic Topography) from 20 Years of Satellite Altimetry
• GNSS Software Receiver for UAVs
• The impact of using jason-1 and cryosat-2 geodetic mission altimetry for gravity field modeling
• Validation of cryoSat-2 based lake levels
• Assessing GOCE Gravity Models using Altimetry and In-situ Ocean Current Observation
• GOCE++ Dynamical Coastal Topography and tide gauge unification using altimetry and GOCE
• Assessing GOCE Gravity Models using Altimetry and Drifters
• The updated geodetic mean dynamic topography model – DTU15MDT
• Accurately measuring sea level change from space: an ESA Climate Change Initiative for MSL closure budget studies
• A new 25 years Arctic Sea level record from ESA satellites
• Deriving the DTU15 Global high resolution marine gravity field from satellite altimetry
• Going down subsidence lane with Sentinel-1 imagery over Denmark
• Impact and Implication of Cyclone ‘Xaver’on Coastal Management in Denmark
• Altimetry for inland water
• DNSC08 mean sea surface and mean dynamic topography models
• Multimodel simulations of Arctic Ocean sea surface height variability in the period 1970-2009
• Integrating Non-Tidal Sea Level data from altimetry and tide gauges for coastal sea level prediction
• Exploring methods for combining altimetry with other data to extend the 20-year altimetric record onto a 50 year timescale
• Increasing the accuracy of Arctic gravity field modeling using Cryosat-2 SAR altimetry
• A global mean ocean circulation estimation using goce gravity models - the DTU12MDT mean dynamic topography model
• The DTU12MDT global mean dynamic topography and ocean circulation model
• Altimetric Mean Sea Surfaces (DNSC06-MSS) and Ocean Variability
• Kernel empirical orthogonal function analysis of 1992-2008 global sea surface height anomaly data
• Recent sea level change analysed with kernel EOF
• An ocean modelling and assimilation guide to using GOCE geoid products
• The DTU2010MSS Mean Sea Surface In The Arctic - For And With Cyrosat-2 Data
• A global mean dynamic topography and ocean circulation estimation using a preliminary GOCE gravity model
• Estimating the North Atlantic mean dynamic topography and geostrophic currents with GOCE
• Improving modeling of GOCE data using reduced point mass or multipole base functions
• Combination of Spaceborne, Airborne and In-Situ Gravity Measurements in Support of Arctic Sea Ice Thickness Mapping
• Crustal Oscillations and Seasonal Ice Mass Fluctuations, G43B-0728
• Full Resolution Geoid from GOCE Gradients for Ocean Modelling
• Toward Improved Estimation of the Dynamic Topography and Ocean Circulation in the High Latitude and Arctic Ocean: The Importance of GOCE
• Marine gravity field for oil and mineral exploration — Improvements in the Arctic from CryoSat-2 SAR altimetry
• GOCE data for local geoid enhancement
• Use of GOCE L2 Gravity Gradients for full resolution Geoid
• GOCE data for local geoid enhancement
• Rummet kalder Jorden
• Recent developments in high-resolution global altimetric gravity field modeling
• The DNSC08GRA global marine gravity field from double retracked satellite altimetry
• Proceedings of the 15th General Meeting of the Nordic Geodetic Commission
• Analysis of local ionospheric time varying characteristics with singular value decomposition
• An initial estimate of the North Atlantic steady-state geostrophic circulation from GOCE
• GOCE in ocean modelling - Point mass method applied on GOCE gravity gradients
• Full Resolution Geoid from GOCE Gradients for Ocean Modeling
• Enhanced Mean Dynamic Topography And Ocean Circulation Estimation Using Goce Preliminary Mode
• Multivariate Regression Approach To Integrate Multiple Satellite And Tide Gauge Data For Real Time Sea Level Prediction
• The Mean Sea Surface DTU10mss - Comparison With Gps And Tide Gauges
• Comparison between GIPSY OASIS 6.0 and BERNESE 5.0 time series for long term GPS stations in Denmark
• Influence of network geometry on densification on the Faroe Islands 2011
• GOCE user toolbox and tutorial
• An initial investigation of the GOCE error variance-covariance matrices in the context of the GOCE user toolbox project
• Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change
• GNET detected an anomalous "spike" in ice loss in Greenland during the 2010 melting season
• Geodetic observations of accelerating ice loss in Greenland
• First evaluation of MyOcean altimetric data in the Arctic Ocean
• LOTUS— Preparing Land and Ocean Take Up from Sentinel-3
• Arctic marine gravity and bathymetry from 3 years of Cryosat-2 SAR altimetry (DTU13 Gravity)
• Impact of CryoSat-2 for marine gravity field - globally and in the Arctic Ocean
• Towards improved estimation of the dynamic topography and ocean circulation in the high latitude and arctic ocean: The importance of GOCE
• Multimission satellite altimetric data validation in the Baltic Sea
• Regional enhancement of the mean dynamic topography using GOCE gravity gradients
• Mapping future flooding hazards from sea extremes and subsidence
• Absolute subsidence rates from persistent scatterer
• Global marine gravity field from the ERS-1 and Geosat geodetic mission altimetry
• A global high resolution mean sea surface from multi mission satellite altimetry
• Earth tide effects on kinematic/static GPS positioning in Denmark and Greenland
• Ocean tidal loading affecting precise geodetic observations on Greenland: Error account of surface deformations by tidal gravity measurements
• The role of satellite altimetry in gravity field modelling in coastal areas
• Initial results from retracking and reprocessing the ERS-1 geodetic mission altimetry for gravity field purposes
• Improving the S2 ocean tide using GRACE gravimetry
• Sea surface temperature and sea-level variability from T/P and JASON-1
• ATSR sea surface temperature data in a global analysis with TOPEX/POSEIDON altimetry
• Correcting GRACE gravity fields for ocean tide effects
• Ocean tides in GRACE monthly averaged gravity fields
• Integration of Altimetry and GOCE Geoid For Ocean Modeling: Results From The GOCINA Project
• Combination of Spaceborne, Airborne and Surface Gravity in Support of Arctic Ocean Sea-Ice and MDT Mapping
• Inter-decadal sea level variability in the 20th century from tide gauges and altimetry
• GOCINA – Geoid and Ocean Circulation in the North Atlantic
• Consolidating User Requirements for the GOCE User Toolbox
• Monitoring sea level and sea surface temperature trends from ERS satellites
• Deriving 2Hz ERS-1 Geodetic Mission Altimetry for Gravity and Marine Geoid Purposes
• Optimal filtering of mean dynamic topography models
• GOCE User Toolbox Specification (GUTS) - Consolidating User Requirements for the GOCE User Toolbox
• Improving the S2 ocean tide using GRACE gravimetry
• Comparisons of Sea Level Signals and Climatic Indices
• Representing the Gravity field using collocation and Ries Representers
• Sea level variability in the 20th century from altimetry and tide gauges and altimetry
• Combining altimetric/gravimetric and ocean model mean dynamic topography models in the GOCINA region
• Error Characteristics of Dynamic Topography Models Derived from Altimetry and GOCE Gravimetry
• Combination of Spaceborne, Airborne and Surface Gravity in Support of Arctic Ocean Sea-Ice and MDT Mapping.
• Refining Global Marine Gravity Prediction from Satellite and Ships. DNSC06 Global Marine Gravity Field and Associated Bathymetry
• Low-frequency variability of global sea surface temperature (solicited)
• The ionospheric eclipse factor method (IEFM) and its application to determining the ionospheric delay for GPS
• Multi-satellite ocean tide modelling - the K-1 constituent
• Crustal deformations at permanent GPS sites in Denmark
• Integration of Altimetry and GOCE Geoid for Ocean Modeling: Results from the GOCINA Project
• Arctic Ocean geoid, ice thickness and mean sea level – the ArcGICE project