IJSRP, Volume 6, Issue 12, December 2016 Edition [ISSN 2250-3153]
Munya F. Al-Zuhairi, Kais J. AL-Jumaily, Ali M. AL-Salihi
‘Tropical Rainfall Measuring Mission’ (TRMM) satellite was launched in 1997 as a joint mission between the National Aeronautics and Space Administration (NASA) and the Japan Aerospace Exploration Agency (JAXA) to gather rain statistics across the tropics. To date, TRMM has produced a nearly continuous tropical rainfall dataset utilizing several onboard instruments including the TRMM Precipitation Radar (PR), a first-of-its-kind space borne Ku-band (13.8 GHz) meteorological radar based on phased array technology. The aim of this research is to analyze PR measurements over Iraq. Data were downloaded from the University of Utah site of TRMM measurements. Analysis of monthly means of precipitation measurements over Iraq for the period 1998-2011. The results showed that most precipitation falls over Iraq during winter season and it is characterized by very light to light rain and mostly falls over north part of the country. The highest area of precipitation happens during the months of April. The results also indicted that the variations and activities precipitation occur mostly during afternoon and evening times. The vertical structure for diurnal variation showed that the highest contribution of the 20 dBz reflectivity occurred in altitudes between 0.5 and 5 km while for seasonal variation the maximum contribution occurred in altitude from 1.5 to 5 km during rainy season over the zone. The vertical structure for 40 dBz reflectivity showed the maximum contribution for diurnal variation occurred in altitude between 1.5 and 2.5 km for most times of the day, and for the seasonal variation, the month of April showed the highest contribution of 40 dBz reflectivity and occurred in altitude between 1.5 and 3.5 km over the zone.