In many of the poorest parts of the world, rainfall is a predictor of increased mortality due to increased risks of vector borne disease, diarrhoeal disease, pneumonia, and natural disaster.  It is possible to monitor rainfall continuously inside demographic surveillance areas through satellite remote sensing with high precision and at low cost.  INDEPTH has prepared a step-by-step technical manual for how to do this.  This document has its own hyperlinks to the source of rainfall image updates and software.