Next Article in Journal
Forest Delineation Based on Airborne LIDAR Data
Next Article in Special Issue
Three-Component Power Decomposition for Polarimetric SAR Data Based on Adaptive Volume Scatter Modeling
Previous Article in Journal
Increasing Spatial Detail of Burned Scar Maps Using IRS‑AWiFS Data for Mediterranean Europe
Article Menu

Export Article

Open AccessArticle
Remote Sens. 2012, 4(3), 745-761; doi:10.3390/rs4030745

A Phase-Offset Estimation Method for InSAR DEM Generation Based on Phase-Offset Functions

National Institute for Space Research (INPE), São José dos Campos, 12227-010 SP, Brazil
Orbisat da Amazônia S. A (ORBISAT), São José dos Campos, 12244-000 SP, Brazil
Author to whom correspondence should be addressed.
Received: 9 January 2012 / Revised: 5 March 2012 / Accepted: 6 March 2012 / Published: 20 March 2012
(This article belongs to the Special Issue Remote Sensing by Synthetic Aperture Radar Technology)
View Full-Text   |   Download PDF [2112 KB, uploaded 19 June 2014]   |  


This paper presents a novel method for estimating the absolute phase offset in interferometric synthetic aperture radar (SAR) measurements for digital elevation model (DEM) generation. The method is based on “phase-offset functions (POF),” relating phase offset to topographic height, and are computed for two different overlapping interferometric data acquisitions performed with considerably different incidence angles over the same area of interest. For the purpose of extended mapping, opposite viewing directions are preferred. The two “phase-offset functions” are then linearly combined, yielding a “combined phase-offset function (CPOF)”. The intersection point of several straight lines (CPOFs), corresponding to different points in the overlap area allows for solving the phase offset for both acquisitions. Aiming at increasing performance and stability, this intersection point is found by means of averaging many points and applying principal component analysis. The method is validated against traditional phase offset estimation with corner reflectors (CR) using real OrbiSAR-1 data in X- and P-band.
Keywords: SAR Interferometry; phase offset estimation; absolute phase; DEM SAR Interferometry; phase offset estimation; absolute phase; DEM

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Mura, J.C.; Pinheiro, M.; Rosa, R.; Moreira, J.R. A Phase-Offset Estimation Method for InSAR DEM Generation Based on Phase-Offset Functions. Remote Sens. 2012, 4, 745-761.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Remote Sens. EISSN 2072-4292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top