What was the purpose of COMEX?

The COMEX campaign supports the mission definition of CarbonSat and HyspIRI by providing representative airborne remote sensing data ‐ MAMAP for CarbonSat; the Airborne Visible InfraRed Imaging Spectrometer (Classic Next Generation) AVIRIS‐C/AVIRIS‐NG for HyspIRI ‐ as well as ground‐ based and airborne in‐situ data.

The objectives of the COMEX campaign activities:

• Investigate spatial/spectral resolution trade-offs for CH4 anomaly detection and flux inversion by comparison of MAMAP-derived emission estimates with AVIRIS/AVIRIS-NG derived data.
• Evaluate sun-glint observation geometry on CH4 retrievals for marine sources.
• Characterise the effect of Surface Spectral Reflectance (SSR) heterogeneity on trace gas retrievals of CO2 and CH4 for medium and low-resolution spectrometry.
• Identify benefits from joint SWIR/TIR data for trace gas detection and retrieval by comparison of MAMAP and AVIRIS/AVIRIS‐NG NIR/SWIR data with MAKO TIR data.

What was the outcome of COMEX?

The campaign data demonstrated that a sensor using solar backscatter absorption spectroscopy and delivering 0.3% single measurement precision with sufficient spatial resolution will allow the determination of the concentration distributions of CH4 with sufficient quality so that flux estimates not only of point sources (like landfills) but also of unknown localised area sources (like oil fields) can be performed quantitatively.

Download the COMEX Final Report

Digital Object Identifier: https://doi.org/10.5270/esa-k85rkdq - COMEX: "Scientific and Technical Assistance for the Deployment of a flexible airborne spectrometer system during C‐MAPExp and COMEX."

The campaign data is available online via FTPS upon submission of a data access request. An active EO Sign In account is required to submit the request.

The data can be downloaded via an FTP client (e.g., FileZilla or WinSCP) using the option "Implicit FTP over TLS".

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