CaltechAUTHORS
  A Caltech Library Service

InSAR Phase Unwrapping Error Correction for Rapid Repeat Measurements of Water Level Change in Wetlands

Oliver-Cabrera, Talib and Jones, Cathleen E. and Yunjun, Zhang and Simard, Marc (2021) InSAR Phase Unwrapping Error Correction for Rapid Repeat Measurements of Water Level Change in Wetlands. IEEE Transactions on Geoscience and Remote Sensing, 60 . Art. No. 5215115. ISSN 0196-2892. doi:10.1109/tgrs.2021.3108751. https://resolver.caltech.edu/CaltechAUTHORS:20211217-98198000

[img] PDF - Accepted Version
See Usage Policy.

11MB
[img] MS Word - Supplemental Material
See Usage Policy.

4MB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20211217-98198000

Abstract

Here, we present an enhanced algorithm to correct interferometric synthetic aperture radar (InSAR) phase unwrapping errors by incorporating iterative spatial bridging between islands and phase closure among interferograms. We use rapid repeat airborne synthetic aperture radar acquisitions from NASA’s airborne uninhabited aerial vehicle synthetic aperture radar (UAVSAR) instrument to estimate short-term changes in water level within coastal wetlands from a stack of consecutive interferograms acquired with very short temporal separation (~30 min). The algorithm is applied to six consecutive UAVSAR images collected in tidal wetlands of the Wax Lake Delta, Louisiana, USA. Validation of our water level change retrievals with in situ field observations was conclusive with high correlation and an RMSE generally smaller than 3 cm. Comparison of our algorithm with other phase unwrapping error correction methods shows significant improvement (30%–35% increase in the number of correctly unwrapped pixels) when applied to rapid changes in water level. The set of corrections presented in this work enables measurement of water level change in deltas and other areas where tides drive highly dynamic flooding of inland vegetated areas. Although demonstrated for water level change, the method is applicable to other InSAR datasets with large spatial gradients or observed discontinuities between coherent but spatially isolated areas.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/TGRS.2021.3108751DOIArticle
https://doi.org/10.1109/TGRS.2021.3108751/mm1DOISupporting Information
https://doi.org/10.1109/TGRS.2021.3116736DOICorrection
ORCID:
AuthorORCID
Oliver-Cabrera, Talib0000-0002-2315-4710
Jones, Cathleen E.0000-0002-2739-1545
Yunjun, Zhang0000-0001-9441-7082
Simard, Marc0000-0002-9442-4562
Additional Information:© 2021 IEEE. Manuscript received June 16, 2021; revised August 9, 2021; accepted August 25, 2021. Date of publication September 15, 2021; date of current version January 26, 2022. The work of Talib Oliver-Cabrera, Cathleen E. Jones, and Marc Simard was supported by the National Aeronautics and Space Administration’s (NASA) Delta-X mission, which is funded by the Science Mission Directorate’s Earth Science Division through the Earth Venture Suborbital-3 Program NNH17ZDA001N-EVS3. This work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). The NASA Delta-X project is funded by the Science Mission Directorate’s Earth Science Division through the Earth Venture Suborbital-3 Program NNH17ZDA001N-EVS3.
Errata:T. Oliver-Cabrera, C. E. Jones, Z. Yunjun and M. Simard, "Corrections to “InSAR Phase Unwrapping Error Correction for Rapid Repeat Measurements of Water Level Change in Wetlands”," in IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-1, 2022, Art no. 9100401, doi: 10.1109/TGRS.2021.3116736
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
NASANNH17ZDA001N-EVS3
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:Interferometric synthetic aperture radar (InSAR), phase unwrapping correction, uninhabited aerial vehicle synthetic aperture radar (UAVSAR), water level change, wetlands
DOI:10.1109/tgrs.2021.3108751
Record Number:CaltechAUTHORS:20211217-98198000
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20211217-98198000
Official Citation:T. Oliver-Cabrera, C. E. Jones, Z. Yunjun and M. Simard, "InSAR Phase Unwrapping Error Correction for Rapid Repeat Measurements of Water Level Change in Wetlands," in IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-15, 2022, Art no. 5215115, doi: 10.1109/TGRS.2021.3108751
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112519
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:17 Dec 2021 23:54
Last Modified:01 Feb 2022 20:57

Repository Staff Only: item control page