Fig. 2From: An investigation of the on-board microwave radiometer of satellite Altimetry for studying the atmosphere variabilityRegion of study area. The green rectangle indicates the Nino 3.4 region where ONI is computed. Red lines indicate the ascending passes and blue lines indicate the descending passes. Passes 127 and 88 are used for along track analysis and black marks are the point used as example for time-series plotBack to article page