GHRC Publishes GPM GV MRR LPVEx dataset

The Global Hydrology Resource Center (GHRC) DAAC published the GPM Ground Validation Micro Rain Radar (MRR) LPVEx dataset. This dataset was collected during the Global Precipitation Measurement (GPM) mission Ground Validation Light Precipitation Validation Experiment (LPVEx) field campaign. The LPVEx field campaign took place around the Gulf of Finland in September and October of 2010. The goal of the campaign was to provide additional high altitude, light rainfall measurements for the improvement of GPM satellite precipitation algorithms. The MRR is a Biral/Metek 24 GHz (K-band) vertically oriented Frequency Modulated Continuous Wave (FM-CW) radar that measures signal backscatter from which Doppler spectra, radar reflectivity, Doppler velocity, drop size distribution, rain rate, liquid water content, and path integrated attenuation are derived. The dataset contains measured and derived data from MRR instruments placed at four remote sites (Jarvenpaa, Emasalo, Harmaja, and the research vessel Aranda). Data files are available in ASCII data format. It should be noted that this dataset contains MRR data during the LPVEx field campaign. A few of the sites have MRR operation before and after the field campaign: May 2010 (Aranda and Jarvenpaa), and November 2010 through March 2011 (Jarvenpaa). These data are also included in the dataset. In the beginning of September 2010, the feed of the MRR at Jarvenpaa was oriented towards the C-band weather radar of the site, and that caused some extra interference, particularly during PPI scans once every hour. Before the active measurements of LPVEx campaign the feed was oriented away from the weather radar, and no significant interference from that source appeared anymore. On 9 November, 2010, components from the MRR deployed at Emasalo were relocated to Jarvenpaa and used to deploy a second MRR ("MRR2") at that site. When the radar was redeployed as the Jarvenpaa MRR2, the vertical resolution was changed from 100 m to 15 m.

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