A multiscale approach to estimating topographically correlated propagation delays in radar interferograms

  title={A multiscale approach to estimating topographically correlated propagation delays in radar interferograms},
  author={Yu-nong Nina Lin and Mark Simons and Eric A. Hetland and Pablo Mus{\'e} and Christopher Dicaprio},
When targeting small amplitude surface deformation, using repeat orbit Interferometric Synthetic Aperture Radar (InSAR) observations can be plagued by propagation delays, some of which correlate with topographic variations. These topographically‐correlated delays result from temporal variations in vertical stratification of the troposphere. An approximate model assuming a linear relationship between topography and interferometric phase has been used to correct observations with success in a few… 
A Robust and Multi-Weighted Approach to Estimating Topographically Correlated Tropospheric Delays in Radar Interferograms
A robust and multi-weighted approach to estimate the correlation between phase and topography that is relatively insensitive to confounding processes such as regional subsidence over larger regions as well as under varying tropospheric conditions is presented.
Correcting InSAR Topographically Correlated Tropospheric Delays Using a Power Law Model Based on ERA-Interim Reanalysis
A power law model based on ERA-Interim (PLE) is developed and tested and it is shown that the PLE method consistently delivered greater standard deviation (STD) reduction after tropospheric corrections than both the linear method and ERA-I method and agreed well with the MERIS measurements.
Cluster-Based Empirical Tropospheric Corrections Applied to InSAR Time Series Analysis
The clustering algorithm is able to identify cases where tropospheric properties vary across topographic divides, reducing total root mean square (rms) by an average of 50%, as opposed to a spatially constant phase-elevation correction, which has insignificant error reduction.
Topography correlated atmospheric delay correction in radar interferometry using wavelet transforms
Atmospheric delay is one of the major sources of error in repeat pass interferometry. We propose a new approach for correcting the topography‐correlated components of this artifact. To this aim we
Mapping ground displacement by a multiple phase difference-based InSAR approach: with stochastic model estimation and turbulent troposphere mitigation
The experimental results show that the proposed method to mitigate the effects of atmospheric turbulence by fusing multiple phase differences (MPDs) between the pixel of interest and those pixels whose displacement can be ignored or can be known based on external displacement datasets.
Systematic InSAR tropospheric phase delay corrections from global meteorological reanalysis data
Despite remarkable successes achieved by Differential InSAR, estimations of low tectonic strain rates remain challenging in areas where deformation and topography are correlated, mainly because of
Toward Mitigating Stratified Tropospheric Delays in Multitemporal InSAR: A Quadtree Aided Joint Model
This work proposes a method that can simultaneously estimate stratified TDs together with parameters of deformation and topographic error based on their distinct spatial–temporal correlation and demonstrates the performance of this method with both simulated and real data sets.
A Spatially Varying Scaling Method for InSAR Tropospheric Corrections Using a High‐Resolution Weather Model
Variation in tropospheric delay is a major limiting factor on the accuracy of interferometric synthetic aperture radar (InSAR) measurements. This is particularly the case when deformation and
A Case Study on the Correction of Atmospheric Phases for SAR Tomography in Mountainous Regions
This paper underscores the indispensability of height-dependent correction of atmospheric phases for SAR tomography by assessing a data-driven approach to estimate these phase variations under a regression-kriging framework.
InSAR Tropospheric Stratification Delays: Correction Using a Small Baseline Approach
  • T. R. Lauknes
  • Environmental Science
    IEEE Geoscience and Remote Sensing Letters
  • 2011
A method for estimating and correcting the effects of tropospheric stratification observed in an SB stack of interferograms is presented and the value of this approach is demonstrated using InSAR data from the Envisat spacecraft and with results from a Global Positioning System network.


Atmospheric effects in interferometric synthetic aperture radar surface deformation and topographic maps
Interferogram images derived from repeat-pass spaceborne synthetic aperture radar systems exhibit artifacts due to the time and space variations of atmospheric water vapor. Other tropospheric
Tropospheric corrections of SAR interferograms with strong topography. Application to Etna
The accuracy of spaceborne geodetic techniques, including SAR interferometry, is limited by the time and spatial variation and altitude dependance of the propagation delay of electomagnetic waves in
Correction for interferometric synthetic aperture radar atmospheric phase artifacts using time series of zenith wet delay observations from a GPS network
[1] Radar interferograms provide precise (millimeter level) measurements of crustal deformation at fine resolution over wide areas. The dominant error source in many interferograms results from
Interferometric synthetic aperture radar atmospheric correction: GPS topography‐dependent turbulence model
[1] Over the last two decades, repeat pass interferometric synthetic aperture radar (InSAR) has been widely used as a geodetic technique for measuring the Earth's surface, including topography and
Some thoughts on the use of InSAR data to constrain models of surface deformation: Noise structure and data downsampling
Repeat‐pass Interferometric Synthetic Aperture Radar (InSAR) provides spatially dense maps of surface deformation with potentially tens of millions of data points. Here we estimate the actual
Ground motion measurement in the Lake Mead area, Nevada, by differential synthetic aperture radar interferometry time series analysis: Probing the lithosphere rheological structure
[1] We measure ground motion around the Lake Mead, Nevada, using synthetic aperture radar interferometry. The lake water level has fluctuated through time since impoundment in 1935. To quantify the
A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms
Results obtained on the data acquired from 1992 to 2000 by the European Remote Sensing satellites and relative to the Campi Flegrei caldera and to the city of Naples, Italy, that demonstrate the capability of the proposed approach to follow the dynamics of the detected deformations.
Neutral atmospheric delay in interferometric synthetic aperture radar applications: Statistical description and mitigation
Variations in the refractive index of the atmosphere cause variations in satellite-based interferometric synthetic aperture radar (InSAR) observations. We can mitigate tropospheric effects by
Radar interferometric mapping of deformation in the year after the Landers earthquake
ALTHOUGH the 1992 Landers, California, earthquake sequence occurred in an area well sampled by geodetic networks1–3, the postseismic deformation in the months following the earthquake has been