Hi Yan

The variable precipitation is the one which uses the 3B42 algorithm as it is described in Satellite Rainfall Applications for Surface Hydrology Editors: Gebremichael, Mekonnen, Hossain, Faisal (Eds.). This algorithm merges all the Infrared and microwave estimates acquired by the constalation of satellites.

However, the Water Cycle Integrator of the eartH2Observe project have several gauge interpolation, gauge adjusted satellite and reanalysis precipitation and temperature datasets at http://www.wci.earth2observe.eu/

Although, validation of precipitataion is important before application. Not only by just comparing the data with observed time series (with raingauge data or hydrological modelling) but also comparing certain features of the time series is important.

Article Analysis of precipitation features estimated by reanalysis d...

If you use Precipitation from remote sensing, you can improve its performance using local raingauge. The merging algorithm descrived in this work have proved to be succesful in reducing the remote sensed field error. In the paper the parameters of the merging are analyzed against the raingauges density so that one defines their value with the features of the local raingauge network and, therefore, one will not need to perform a calibration procedure.

Conference Paper Analysis of the kernel bandwidth influence in the double smo...

Regards

Thanks so much Nicolas! Nicolás Duque-Gardeazábal