IWV from shipborne GNSS antenna on R/V Maria S. Merian during EUREC4A campaign

<p>In the framework of the EUREC4A campaign (January and February 2020), IWV contents were retrieved over the open Tropical Atlantic Ocean using Global Navigation Satellite Systems (GNSS) data acquired from R/V Maria S. Merian. The IWV data were converted from screened ZTD data. ZTD data were produced with SPARK software using GPS observations. The ZTD data (one estimate every 30 seconds) were screened and converted to IWV using ERA5 mean sea level pressure level and integrated mean temperature (Tm) provided by TU-Wien database (<a href="https://vmf.geo.tuwien.ac.at/">https://vmf.geo.tuwien.ac.at/</a>) with bi-linear horizontal interpolation from 4 surrounding grid points and linear time interpolation. More information about the post-processing can be found in Bosser et al., 2020.</p>