CHAPTER 1 SYSTEMS: INTERNATIONAL SPACE STATION PLANNING—A ROADMAP TO GETTING IT ALL DONE 10 coordination activities. The STP is the baseline plan, and it takes precedence over the Final WLP for operations on that particular day. The STP is also loaded into a computer-based viewing application, the Operations Planning TIMeline Integration System (OPTIMIS), to enable easy review by flight controllers in all control centers as well as initial review by the ISS crew. Ultimately, on the day of execution (e.g., Day of Exe in Figure 5), the entire ISS operations community conducts operations from the OSTP—a single integrated timeline. Figure 7 shows an OSTP as depicted in the OPTIMIS application. During execution day, crew members provide an ongoing status of activity execution using the OSTP. Flight control team members provide the crew with an ongoing status of ground or on-board systems activity execution using the OSTP. For example, the crew will mark a task “gray,” which indicates it has been completed. These statuses by crew and ground teams are exchanged and synchronized to allow all plan users to follow the execution status on the ground. The Russians additionally communicate a subset of the official OSTP plan to the Russian crew members using a document called Form 24, which is essentially a text summary of the day’s events. Figure 6. Graphic depiction of the STP timeline generated from the WLP for a particular day of the week. The top bands show when S-band or Ku communications coverage is available, when the day/night cycles occur, the station attitude, and even the configuration of the planned telemetry link to the ground. Crew member activities (e.g., CDR for Commander or FE1 for Flight Engineer 1), shown near the top, detail their specific activities. Other display bands indicate which activities are using the S- or Ku-band systems, and required coordination with the MCC or, in this example, what the Columbus (COL) flight control team members are doing.