The GPM Ground Validation Met One Rain Gauge Pairs IFloodS V2 data measures the amount of fallen precipitation collected by a Model 380 tipping bucket rain gauge made by Met One Instruments, Inc. The gauge has a 30.5 cm diameter catchment funnel. Precipitation is collected to a resolution of 0.254 mm of liquid water for each bucket tip. These gauges measure rainfall over a 1 second interval. This data set has two types of files, the 1 second rainfall data and a 1-minute cubic-spline interpolated rain rate produced using the method described in Wang, 2008. There are two rain gauges located on each station (A or B), each with their own set of data files. Data were collected from April 2013 through December 2013 as part of the GPM Ground Validation Iowa Flood Studies (IFloodS) Field Experiment. More detailed information about the Met One Model 380 Precipitation Gauge is available at http://www.metone.com/docs/370_380_precipitation_gauge.pdf