While the scan ranges for Full Disk and the Japan Area will be preliminarily fixed, those of the Target Area and Landmark Areas will be flexible to enable prompt reaction to meteorological conditions. At the beginning of Himawari-8’s operation, Landmark Area data will be used only for navigation, and are not intended for use as satellite products. In the future, JMA plans to use Region 5 for observation of phenomena such as rapidly developing cumulonimbus clouds and to provide the resulting data to users. In each 10-minute period, the AHI will scan the Full Disk once, the Japan Area and Target Area four times, and the two Landmark Areas twenty times. These 10-minute divisions are basic units of an observation schedule called a timeline. In Himawari-8 and -9’s baseline observation, the timeline will be repeated every 10 minutes except in their housekeeping operation. The observation areas and frequencies are shown in Table 2, and scan images on a timeline are shown in Figure 1. The Japan Area is shown in Figure 3. The observation areas and numbers of pixels are shown in Table 3 (pixel numbers for regional observations may be changed in orbit testing after launch). The following movie shows the concept of the AHI observation sequence on a 10-minute timeline: