5.2. Image Data Figures 5-2 and 5-3 respectively show the image data structure and a set of more detailed stereo image structures. Figure 5-2 Image data structure Figure 5-3 Relationship between Band 3N and Band 3B image lines of Level-1B product at zero elevation Figure 5-4 shows the direction of the path-oriented Level-1B image for both the daytime and the nighttime. Note that the spacecraft flight direction for the nighttime image is opposite to that for the daytime direction. Figure 5-4 Direction of Level-1B images for daytime and nighttime observation