Jayson Eppler

Jayson Eppler
MDA Systems

PhD

About

16
Publications
3,321
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
79
Citations
Additional affiliations
January 2013 - October 2015
Simon Fraser University
Position
  • PhD Student

Publications

Publications (16)
Article
Interferometric Synthetic Aperture Radar (InSAR) time series analysis of natural terrain allows for characterization of long-term geophysical trends over extended areas and, in the case of distributed scatterers (DS), is significantly enhanced by methods that exploit the full complex-valued scattering statistics. Phase-linking (PL) estimators impos...
Article
Area-based measurements of snow water equivalent (SWE) are important for understanding earth system processes such as glacier mass balance, winter hydrological storage in drainage basins, and ground thermal regimes. Remote sensing techniques are ideally suited for wide-scale area-based mapping with the most commonly used technique to measure SWE be...
Preprint
Full-text available
Area-based measurements of snow water equivalent (SWE) are important for understanding earth system processes such as glacier mass balance, winter hydrological storage in drainage basins and ground thermal regimes. Remote sensing techniques are ideally suited for wide-scale area-based mapping with the most commonly used technique to measure SWE bei...
Article
Snow water equivalent (SWE) is an important surface parameter for understanding a number of Earth system processes. Synthetic aperture radar (SAR) has considerable potential for measuring SWE of dry-snow because SAR can penetrate through the snow to the ground surface and is both amplitude- and phase-sensitive to refraction from the snow. Previous...
Article
Full-text available
The timing of snowmelt is an important turning point in the seasonal cycle of small Arctic catchments. The TerraSAR-X (TSX) satellite mission is a synthetic aperture radar system (SAR) with high potential to measure the high spatiotemporal variability of snow cover extent (SCE) and fractional snow cover (FSC) on the small catchment scale. We invest...
Article
Full-text available
We discuss enhanced processing methods for high resolution Synthetic Aperture Radar (SAR) interferometry (InSAR) to monitor small landslides with difficult spatial characteristics, such as very steep and rugged terrain, strong spatially heterogeneous surface motion, and coherence-compromising factors, including vegetation and seasonal snow cover. T...
Conference Paper
The combined effect of climate change and accelerated economic development in Northern regions increases the threat of permafrost related surface deformation of transportation infrastructure. Satellite based Synthetic Aperture Radar Interferometry (InSAR) provides a means for monitoring deformation over remote and spatially extensive areas and is h...
Conference Paper
Subsurface excavations may cause subsidence due to redistribution of stress in the overburden or changes in the groundwater state. In the case of tunnelling under urban areas this may result in damage to existing high value infrastructure within the surface zone of influence. Synthetic aperture radar interferometry (InSAR) is a useful tool for urba...
Conference Paper
Full-text available
Surface displacements derived from Interferometric Synthetic Aperture Radar (InSAR) for the monitoring and risk assessment of geohazards near pipeline corridors are presented. The InSAR results are integrated with GIS analyses and field data to define geologic and preliminary geomechanical models using the InSAR-derived displacements and GIS-derive...
Article
Full-text available
The combined effect of climate change and accelerated economic development in Northern regions increases the threat of permafrost related surface deformation to buildings and transportation infrastructure. Satellite based InSAR provides a means for monitoring infrastructure that may be both remote and spatially extensive. However, permafrost poses...
Conference Paper
Full-text available
Surface displacements for urban infrastructure monitoring are derived using Interferometric Synthetic Aperture Radar (InSAR). The analysis uses a novel InSAR method, Homogenous Distributed Scatterer (HDS)-InSAR, that exploits both persistent point and coherent distributed scatterers using adaptive multi-looking of statistically homogenous pixel nei...
Conference Paper
Full-text available
Several RADARSAT-2 modes are available that provide SLC products which are generated using 2-bit BAQ compressed raw downlinked data. These extended swath modes have the advantage of providing significantly wider swath coverage at the same nominal resolution as their 3-bit counterparts at the expense of higher noise levels due to the increased compr...
Conference Paper
This paper describes and demonstrates novel InSAR deformation analysis methods for: (i) the identification of ice-rich and unstable areas of permafrost for infrastructure planning and (ii) mapping and monitoring existing infrastructure displacement and areas of risk in permafrost regions. InSAR analysis is performed using a novel high temporal reso...
Article
Full-text available
The detection and monitoring of subsurface excavations has a variety of applications in both the civil and defense domains. We have developed a novel InSAR method (Homogenous Distributed Scatterer (HDS)-InSAR) that exploits both persistent point and coherent distributed scatterers by using adaptive multilooking of statistically homogenous pixel nei...
Article
This study compared the sensitivity and specificity of stereoscopic digital photography of the retina through a dilated pupil with a 45 degrees nonmydriatic camera and Joint Photographic Experts Group (JPEG) compression of the images with the sensitivity and specificity of 35-mm slide film photography in the identification of age-related macular de...

Network

Cited By