Scientific assessment of TDS-1 GNSS-R scatterometric measurements (TGSCATT) - Technical Note 5: Evaluation of SGR-ReSI Level 2 wind quality: triple collocation analysis

Abstract

Work Package (WP) 5000 uses the knowledge acquired in previous TGSCATT WPs to consolidate, validate and document the Level-1 to Level-2 inversion algorithms for TDS-1. Validation entails the development of extended TDS-1 matchup datasets with new independent measurements to validate the performance of the inversion algorithms over a wide range of conditions. The task should result in documentation of the TDS-1 Level 2 inversion algorithms in the form of Algorithm Theoretical Basis Documents (ATBD). Over the course of the TGSCATT project, a new Level 2 SGR-ReSI wind dataset, using the so-called Calibrated Bistatic Radar Equation (CBRE) approach [1], has been made available to the team. Such wind dataset addresses several systematic and random errors present in earlier SGR-ReSI data versions and is therefore of high interest to the project. As such, WP5000 has been somewhat redefined and is now focused on the objective validation of the new wind dataset