Day 4

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Paper title EarthCARE-like payload on HALO – Lessons learned and plans for validation
Authors
  1. Silke Groß German Aerospace Center (DLR) Speaker
  2. Florian Ewald German Aerospace Center (DLR)
  3. Martin Wirth DLR - Institute of Atmospheric Physics
  4. Manuel Gutleben Ludwig-Maximilians-Universität München
  5. Quitterie Cazenave LATMOS/IPSL, CNRS, Université Paris-Saclay
  6. Julien Delanoë LATMOS/IPSL, CNRS, Université Paris-Saclay
Form of presentation Poster
Topics
  • A1. Atmosphere
    • A1.09 EarthCARE: Preparing for the Scientific Mission Exploitation to Quantify the Impact of Clouds and Aerosols on Radiation
Abstract text With the combination of two active instruments, a cloud radar and a high spectral resolution lidar, and a set of passive instruments, the ESA/JAXA EarthCARE mission will be the most complex satellite for aerosol, cloud and radiation measurements from space. With its so-called NARVAL payload, the German high altitude and long-range aircraft HALO is equipped with similar instruments as the upcoming satellite experiment. Having the same or similar payload on an aircraft provides the opportunity to apply and test algorithms, to investigate constraints of the future satellite mission, and to develop strategies for and perform validation studies.

Since 2013, the EarthCARE-like payload (HSRL at 532 nm with polarization sensitive channels at 532 nm and 1064 nm, Ka-band radar with 30 kW peak power, hyper-spectral radiometer, and microwave radiometer) on HALO was deployed during a number of six flight experiments and thus collected a large number of measurements that are currently used to prepare for the upcoming satellite mission. The measurements were performed at different locations including the tropical and sub-tropical North-Atlantic region up to the extra-tropical North-Atlantic and the European Mid-Latitudes. We used these measurements for comparison studies of current satellite measurements, airborne measurements and simulations, and process studies with the advantage of a much higher spatial resolution and/or sensitivity compared to the future space borne measurements. In this context, we investigated the benefit and constrains of the upcoming satellite mission and studied the effect of instrument resolution and sensitivity on the derived properties. With the combination of remote sensing measurements and airborne in-situ measurements we validated satellite retrievals by directly comparing retrieval output with measured properties. Looking ahead, we furthermore developed an elaborated proposal for an upcoming validation study addressing different locations and aspects of validation.

In this presentation we will give an overview of our EarthCARE preparation studies and their main results. We address different stages and aspects of satellite preparation; from the development of new strategies and methods, to sensitivity tests and finally towards the investigation of retrievals. By summarizing our lessons learned we will consolidate our insights which helped to shape ideas for a future validation campaign.