Evaluation of the performance of three satellite precipitation products over Africa

Aleix Serrat-Capdevila, Manuel Merino, Juan B. Valdes, Matej Durcik

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


We present an evaluation of daily estimates from three near real-time quasi-global Satellite Precipitation Products-Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA), Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks (PERSIANN), and Climate Prediction Center (CPC) Morphing Technique (CMORPH)-over the African continent, using the Global Precipitation Climatology Project one Degree Day (GPCP-1dd) as a reference dataset for years 2001 to 2013. Different types of errors are characterized for each season as a function of spatial classifications (latitudinal bands, climatic zones and topography) and in relationship with the main rain-producing mechanisms in the continent: the Intertropical Convergence Zone (ITCZ) and the East African Monsoon. A bias correction of the satellite estimates is applied using a probability density function (pdf) matching approach, with a bias analysis as a function of rain intensity, season and latitude. The effects of bias correction on different error terms are analyzed, showing an almost elimination of the mean and variance terms in most of the cases. While raw estimates of TMPA show higher efficiency, all products have similar efficiencies after bias correction. PERSIANN consistently shows the smallest median errors when it correctly detects precipitation events. The areas with smallest relative errors and other performance measures follow the position of the ITCZ oscillating seasonally over the equator, illustrating the close relationship between satellite estimates and rainfall regime.

Original languageEnglish (US)
Article number836
JournalRemote Sensing
Issue number10
StatePublished - Oct 2016


  • Africa
  • Bias correction
  • Error analysis
  • ITCZ
  • Product averaging
  • Satellite precipitation products
  • TMPA 3B42-RT

ASJC Scopus subject areas

  • General Earth and Planetary Sciences


Dive into the research topics of 'Evaluation of the performance of three satellite precipitation products over Africa'. Together they form a unique fingerprint.

Cite this