Fig. 2From: Contrast sources for the infrared images taken by the Venus mission AKATSUKIOptical thickness of three cloud layers measured by the entry probes summarized by James et al. (1997). (a) Pioneer Venus Large Probe; (b–g) Veneras 9–14; (h): mean of seven profiles (a–g). The upper haze layer is added to the mean following Crisp (1986).Back to article page