Assessment of TRMM Rainfall Data (2001-2015) Over the Indian Region

Now-a-days to overcome the difficulty of availability of climatic data, especially on a daily time scale, researchers prefer to use satellite data which has its wide applications in many fields viz. meteorology, hydrology, water resources models, climatic studies etc. However, it is essential to verify these data for more consistent with the observed data. In view of this, our study aimed to assess the TRMM data with that of observed rainfall data over the Indian region.
Observed rainfall data and TRMM data for 2001-2014 monsoon season were used. Analysis of data was carried out by programming and Microsoft Excel functions.
The TRMM values are to the higher side in the years 2001, 2002, 2003, 2010, and 2015 whereas there is hardly any difference between the two in the years 2008 to 2014. The observed rainfall is more than TRMM rainfall in the years 2004 to 2007.
Observed rainfall and TRMM rainfall values for Jun-Sept period are comparable. There is high consistency between the estimates of these two data sets during 2008 to 2015 than the earlier seven years period.