Bridging Loss-of-Lock in InSAR Time Series of Distributed Scatterers

We introduce the term loss-of-lock to describe a specific form of coherence loss that results in the breakage of a synthetic aperture radar interferometric (InSAR) time series. Loss-of-lock creates a specific pattern in the coherence matrix of a multilooked distributed scatterer (DS) by which it may be detected. Along with identification, we...

Maintenance commitments: Conception, semantics, and coherence

Social commitments are recognized as an abstraction that enables flexible coordination between autonomous agents. We make these contributions. First, we introduce and formalize a concept of a maintenance commitment, a kind of social commitment characterized by a maintenance condition whose truthhood an agent commits to maintain. This concept...

Systematic errors observed in CryoSat-2 elevation swaths on mountain glaciers and their implications

Our awareness of ice caps' and mountain glaciers' sensitivity to climate change has driven major advances in the application of remote sensing techniques during the past decade. Regarding ESA's SARIn altimeter CryoSat-2, processing the full waveform to generate swaths of elevation estimates has become standard practice in regions of complex...

Insar coherence analysis for wetlands in alberta, canada using time-series sentinel-1 data

Wetlands are valuable natural resources which provide numerous services to the environment. Many studies have demonstrated the potential of various types of remote sensing datasets and techniques for wetland mapping and change analysis. However, there are a relatively low number of studies that have investigated the application of the...

Effect of partial coherent illumination on Fourier Ptychography

Fourier Ptychography is a computational imaging technique able to decouple high resolution from wide field of view, bypassing the diffraction limit of the microscope. Since it does not rely on high precision mechanics or fluorescent imaging, it is of practical interest for implementation in low scale devices. Despite its gains, realizing a...

Nonequilibrium interpretation of DC properties of NbN superconducting hot electron bolometers

We present a physically consistent interpretation of the dc electrical properties of niobiumnitride (NbN)-based superconducting hot-electron bolometer mixers, using concepts of nonequilibrium superconductivity. Through this, we clarify what physical information can be extracted from the resistive transition and the dc current-voltage...

Studies in Singular Optics and Coherence Theory

In this dissertation, the field of singular optics is examined in terms of common laboratory experiments. Different types of field singularities are related to one another. Problems in coherence theory related to two correlated sources are also investigated.