Skip to main content

Calibrating and mosaicking surface velocity measurements from interferometric SAR data with a simultaneous least-squares adjustment approach

Buy Article:

$63.00 plus tax (Refund Policy)

The repeat-pass interferometric SAR (InSAR) technique has been well established as a precise means to extract two-dimensional surface velocity fields. Many applications require velocity measurements over a large area and multiple InSAR image frames from the same and/or adjacent orbits are needed to achieve full ground coverage. The conventional frame-by-frame processing approach often causes velocity discrepancies and discontinuities between adjacent frames. In addition, absolute velocity information may not be derived for some image frames due to a lack of velocity control points. We present a unified simultaneous least-squares adjustment method for calibrating and merging surface displacements derived from multiple InSAR image frames using the speckle tracking method. Observation equations have been mathematically derived for velocity control points and tie points. The major advantages of our method include consistent and smooth transition of velocity measurements between adjacent frames and dramatic reduction of velocity control point requirements. For those frames devoid of velocity control points, absolute velocity measurements can still be derived with this method based on distant velocity control points in other frames. The benefits of our method are demonstrated and evaluated by using Radarsat InSAR data for Antarctica acquired in 1997.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: 1: Department of Geography, Texas A&M University, College Station, TX 77843 2: Department of Physics & Geosciences, Texas A&M University, Kingsville, TX 78363 3: Vexcel Canada, Inc., Nepean, Ontario, Canada 4: Byrd Polar Research Center, The Ohio State University, Columbus, OH 43210

Publication date: 2007-01-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more