Sentinel-1 SAR Backscatter Analysis Ready Data Preparation in Google Earth Engine

Adugna Mullissa*, Andreas Vollrath, Christelle Odongo-braun, Bart Slagter, Johannes Balling, Yaqing Gou, Noel Gorelick, Johannes Reiche

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

198 Citations (Scopus)

Abstract

Sentinel-1 satellites provide temporally dense and high spatial resolution synthetic aperture radar (SAR) imagery. The open data policy and global coverage of Sentinel-1 make it a valuable data source for a wide range of SAR-based applications. In this regard, the Google Earth Engine is a key platform for large area analysis with preprocessed Sentinel-1 backscatter images available within a few days after acquisition. To preserve the information content and user freedom, some preprocessing steps (e.g., speckle filtering) are not applied on the ingested Sentinel-1 imagery as they can vary by application. In this technical note, we present a framework for preparing Sentinel-1 SAR backscatter Analysis-Ready-Data in the Google Earth Engine that combines existing and new Google Earth Engine implementations for additional border noise correction, speckle filtering and radiometric terrain normalization. The proposed framework can be used to generate Sentinel-1 Analysis-Ready-Data suitable for a wide range of land and inland water applications. The Analysis Ready Data preparation framework is implemented in the Google Earth Engine JavaScript and Python APIs. View Full-Text
Original languageEnglish
Article number1954
JournalRemote Sensing
Volume13
Issue number10
DOIs
Publication statusPublished - 2021

Keywords

  • Analysis ready data
  • Google earth engine
  • Preprocessing
  • Sentinel-1
  • Speckle filter

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