Topographic and thermal mapping of volcanic terrain using the AVTIS ground-based 94-GHz dual-mode radar/radiometric imager

David G. MacFarlane*, Henry M. Odbert, Duncan A. Robertson, Mike R. James, Harry Pinkerton, Geoff Wadge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
2 Downloads (Pure)

Abstract

The All-Weather Volcano Topography Imaging Sensor remote sensing instrument is a custom-built millimeter-wave (MMW) sensor that has been developed as a practical field tool for remote sensing of volcanic terrain at active lava domes. The portable instrument combines active and passive MMW measurements to record topographic and thermal data in almost all weather conditions from ground-based survey points. We describe how the instrument is deployed in the field, the quality of the primary ranging and radiometric measurements, and the postprocessing techniques used to derive the geophysical products of the target terrain, surface temperature, and reflectivity. By comparison of changing topography, we estimate the volume change and the lava extrusion rate. Validation of the MMW radiometry is also presented by quantitative comparison with coincident infrared thermal imagery.
Original languageEnglish
Article number6236133
Pages (from-to)455-472
Number of pages18
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume51
Issue number1
Early online date10 Jul 2012
DOIs
Publication statusPublished - Jan 2013

Keywords

  • Digital elevation models
  • millimeter-wave (MMW) imaging
  • MMW propagation
  • MMW radar
  • radiometry
  • terrain mapping
  • volcanoes

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