Synapse
⌘+K
Synapse
PulseExploreClubsResearchersJournals
Instagram
HomeClubsExplore
July 10, 1989Journal of Geophysical Research Atmospheres

Mapping small elevation changes over large areas: Differential radar interferometry

View Full Paper
Ask AI
Bookmark
Share

Authors

AGAndrew K. GabrielHorizon College and SeminaryRGR. M. GoldsteinCornell UniversityHZH. A. ZebkerStanford University

Discussion

Loading...

Member takes

Implication

Validation study demonstrates centimeter-scale ground elevation mapping across broad terrains using differential radar interferometry, highlighting its utility for tracking geophysical hazards.

Key Points

  • To develop and evaluate a differential synthetic aperture radar (SAR) interferometry technique capable of detecting subtle, centimeter-scale ground elevation changes across wide geographic areas.
  • Analyzed repeat-pass synthetic aperture radar data collected by the Seasat satellite over an imaging site in Imperial Valley, California.
  • Differenced the radar signal phases of corresponding pixels across passes to resolve surface motion at the scale of the carrier wavelength.
  • Applied a three-pass baseline computation to isolate and remove topographic parallax distortions from genuine surface deformation.
  • Resolved surface elevation motions of 1 cm or less with 10 m spatial resolution across 50 km swaths.
  • Successfully detected localized surface displacement in the Imperial Valley and correlated the phase changes with ground-truth records of clay swelling driven by water absorption.

Cite This Study

Gabriel et al. (1989) studied this question.

synapsesocial.com/papers/69ffb84fb124fe5819859539https://doi.org/10.1029/jb094ib07p09183
View Full Paper
Ask AI
Bookmark
Share