CATALYST.Earth

WHITEPAPERS

Monitoring Ground Movement Risk with State-of-the-art InSAR

Overview Uplift and subsidence are ground displacements that can put dangerous strain on critical infrastructure, such as pipelines, buildings, dams, and roadways. To facilitate affordable, repetitive monitoring of millimeter-level ground movement, we have unveiled a new InSAR workflow called Small-baseline Subset Persistent Scatterer Interferometry (SBAS-PSI) in our CATALYST solutions. Complete Form To Access PDF​ Download …

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Target Scattering Decomposition

The Kennaugh–Huynen scattering matrix condiagonalization is projected into the Pauli basis to derive a new scattering vector model for the representation of coherent target scattering. This model permits a polarization basis invariant representation of coherent target scattering in terms of five independent target parameters, the magnitude and phase of the symmetric scattering type introduced in …

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Change Detection using SAR Data

The ability to identify and measure significant changes in target scattering and/or polarimetric parameters at known and co-located image locations provides a very powerful tool for large area military and/or environmental monitoring applications. This paper describes the techniques developed by PCI to calculate a “change measurement” derived from co-registered polarimetric parameters. The detected changes are …

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Improving Airphoto Processing with Automated Functions

The need for airphoto processing in resource, security, planning and other applications is continually increasing. How can these demands be met? Large scale projects require fast, efficient processing of thousands of images every year, providing critical information about our cities, our natural resources, our transportation, our climate, and more. In a way that traditional maps …

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Wetland Characterization

New computational environments are emerging – cloud computing which promises to provide vast computational resources on demand. Many corporations are moving to such environments to better share resources between compute intensive applications, to provide for surges in demand and reduce overall cost of ownership. Over time larger customers will demand applications running in these environments. …

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Improving Airphoto Processing with Automated Functions

The need for airphoto processing in resource, security, planning and other applications is continually increasing. How can these demands be met? Large scale projects require fast, efficient processing of thousands of images every year, providing critical information about our cities, our natural resources, our transportation, our climate, and more. In a way that traditional maps …

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Empirical line model for the atmospheric correction of sentinel-2A MSI images in the Caribbean Islands

An Empirical Line Model (ELM) was tested to correct Sentinel-2A (MSI) images acquired in the tropical archipelago of San Andrés, Colombia. This approach uses a linear regression to model the relationship between the average ground reflectance and radiance on bands 2, 3, 4, and 8, for 32 spectrally homogeneous targets. The model was validated from …

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Semi-Automated Historical Airphoto Processing

Geometric Correction of historical imagery is a complicated, time consuming and expensive operation. Due to a lack of development related to streamlining these operations, a significant amount of manual processing time must be invested into current projects. A system capable of achieving reliable accuracy that considerably reduces project turnaround time is required to help manage …

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CATALYST Enterprise Pansharp Test Results

After demonstrating the exceptional performance improvement in the orthorectification module (approximately fourteen-fold – see CATALYST Enterprise Ortho Performance Whitepaper), the same approach has been applied to the pansharp module by taking advantage of newly developed code, modern, multi-core processor architecture and nVidia Graphical Processing Units (GPUs). Download PDF