CHAPTER 5 SYSTEMS: COMMAND AND DATA HANDLING—THE BRAINS OF THE INTERNATIONAL SPACE STATION 102 Table 4. Basic Parameters of the PCS Features Specification Processor 2.5 GHz core duo Memory 4 Gb RAM Hard Drive 160 Gb Battery 2.0-hour lithium ion battery Display 39 cm (15.4 in) diagonal LCD display with active matrix 1920 x 1200 pixel resolution, 256 colors Dimensions 4 cm x 36 cm x 2128 cm (1.4 in. x 14 in. x 11 in.), 2.7 kg (6 lb) with battery and DVD drive External Power Supply 28 V DC or 120 V DC Expansion Slot Single slot for 1553 interface connector Peripherals DVD-RW/CD-RW Pressure Range 456 mm Hg (9.0 psi) to 827 mm Hg (16.0 psi) Figure 4. An image of the home page on the PCS. Each module of the ISS is represented. In addition, the astronauts can navigate to a specific system using one of the icons on the right side of the screen. From top to bottom: C&DH, communications and tracking, life support, power, attitude control, mechanical (not used), thermal control, extravehicular activity, medical, racks (not used), robotics, and emergency escape system (not currently used). Certain functions such as viewing the listing of commands (“Cmd Log”) issued by the laptop, a summary of fire or rapid depress status, or other miscellaneous tools can be accessed on the left side of the screen. Visiting vehicles such as the Automated Transfer Vehicle are also shown, when appropriate.