Lai Bun Lok
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View article: Choice and impact of frequency increment in direct digital synthesiser (DDS)‐based linear FMCW radar
Choice and impact of frequency increment in direct digital synthesiser (DDS)‐based linear FMCW radar Open
FMCW radar is a popular technique for radar sensors. A Direct Digital Synthesiser (DDS) is commonly used to generate the required linear frequency sweep. DDS devices are widely‐available and easy to configure in terms of the key radar para…
View article: Ground-based Radar Observations of Snow Cover Evolution and Flowing Avalanches
Ground-based Radar Observations of Snow Cover Evolution and Flowing Avalanches Open
Earth and Space Science Open Archive PosterOpen AccessYou are viewing the latest version by default [v1]Ground-based Radar Observations of Snow Cover Evolution and Flowing AvalanchesAuthorsAnselmKöhlerLai BunLokiDJan-ThomasFischeriDSee all…
View article: mGEODAR – a new mobile radar for avalanche mass movement monitoring
mGEODAR – a new mobile radar for avalanche mass movement monitoring Open
<p>Radar imaging has become increasingly important in either the detection of avalanches or in the scientific characterization of the avalanche flow. Detection radars usually base on the Doppler radar principle that is sensitive to t…
View article: mGEODAR—A Mobile Radar System for Detection and Monitoring of Gravitational Mass-Movements
mGEODAR—A Mobile Radar System for Detection and Monitoring of Gravitational Mass-Movements Open
Radar measurements of gravitational mass-movements like snow avalanches have become increasingly important for scientific flow observations, real-time detection and monitoring. Independence of visibility is a main advantage for rapid and r…
View article: Ground penetrating radar investigations in Quebrada Montes, Lobitos, Peru
Ground penetrating radar investigations in Quebrada Montes, Lobitos, Peru Open
<p>The dry equatorial forests in the north-western coast of Peru suffer from acute water stress and man-driven deforestation. Recent estimates indicate that the forests have reduced to approximately 10% of their original size. There …
View article: Physical Conditions of Fast Glacier Flow: 3. Seasonally‐Evolving Ice Deformation on Store Glacier, West Greenland
Physical Conditions of Fast Glacier Flow: 3. Seasonally‐Evolving Ice Deformation on Store Glacier, West Greenland Open
Temporal variations in ice sheet flow directly impact the internal structure within ice sheets through englacial deformation. Large‐scale changes in the vertical stratigraphy within ice sheets have been previously conducted on centennial t…
View article: Prototype wireless sensors for monitoring subsurface processes in snow and firn
Prototype wireless sensors for monitoring subsurface processes in snow and firn Open
The detection and monitoring of meltwater within firn presents a significant monitoring challenge. We explore the potential of small wireless sensors (ETracer+, ET+) to measure temperature, pressure, electrical conductivity and thus the pr…
View article: Surface Meltwater Impounded by Seasonal Englacial Storage in West Greenland
Surface Meltwater Impounded by Seasonal Englacial Storage in West Greenland Open
The delivery of surface meltwater through englacial drainage systems to the bed of the Greenland Ice Sheet modulates ice flow through basal lubrication. Recent studies in Southeast Greenland have identified a perennial firn aquifer; howeve…
View article: Radar Altimetry as a Robust Tool for Monitoring the Active Lava Lake at Erebus Volcano, Antarctica
Radar Altimetry as a Robust Tool for Monitoring the Active Lava Lake at Erebus Volcano, Antarctica Open
The level of lava within a volcanic conduit reflects the overpressure within a connected magma reservoir. Continuous monitoring of lava level can therefore provide critical insights into volcanic processes and aid hazard assessment. Howeve…
View article: Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar Open
The phase-sensitive radio-echo sounder (pRES) is a powerful new instrument that can measure the depth of internal layers and the glacier bed to millimetre accuracy. We use a stationary 16-antenna pRES array on Store Glacier in West Greenla…
View article: ApRES Internal Layer Power and AWS Data
ApRES Internal Layer Power and AWS Data Open
Radar and weather station data collected in 2014 as part of the Subglacial Access and Fast Ice Research Experiment (SAFIRE) and used to quantify englacial water storage in the paper, Surface Meltwater Impounded by Seasonal Englacial Storag…
View article: ApRES_displacement_14a_Depth.csv
ApRES_displacement_14a_Depth.csv Open
ApRES_displacement_14a_Depth.csv: Daily time series of ApRES-measured depth of internal layer reflectors for Deployment 14a (08 May 2014 to 16 July 2014).
View article: SAFIRE ApRES Datasets
SAFIRE ApRES Datasets Open
Datasets from the Subglacial Access and Fast Ice Research Experiment (SAFIRE) as published in the paper by Doyle et al. entitled "Physical conditions of fast glacier flow: 3. Seasonally-evolving ice deformation on Store Glacier, West Green…
View article: ApRES Internal Layer Power and AWS Data
ApRES Internal Layer Power and AWS Data Open
Radar and weather station data collected in 2014 as part of the Subglacial Access and Fast Ice Research Experiment (SAFIRE) and used to quantify englacial water storage in the paper, Surface Meltwater Impounded by Seasonal Englacial Storag…
View article: Radar observations of Arctic ice
Radar observations of Arctic ice Open
To many observers, the Arctic is synonymous with snow and ice. For example, the Arctic Ocean spans just over 14 million km2 – an area larger than that of Europe – which is variably covered in frozen ocean water, or sea ice, throughout the …