Due to the closeness of the data ERA5 total Precipitation with the statistics of ground stations measuring precipitation, The satellite GPM appears to perform very poorly in measuring snow. Although this set of satellites use two important tools to estimate the rate of precipitation (DPR and GMI); But our investigations show that in the Middle East (neighboring countries of Iran) in the areas where it snows, the satellite hardly observes it. Please look at the maps below. From top to bottom: 1-total precipitation (IMERG Late Run). 2-total precipitation (ERA5). 3-difference ((IMERG Late Run) - (ERA5)). in the period from October 1 to December 31, 2023 #NASA #NOAA #ECMWF #ERA5 #Precipitation #Snow #GPM #IMERG