PLEASE BE PATIENT WHILE JAVA APPLET LOADS. We will help you with the calculations. First select the geometric shape of your design using the radio buttons. Enter the population and physical dimensions (radius, length etc) of your colony design. Press the button to calculate the corresponding values. You can then "fine tune" your design by changing the gravity, air pressure and energy per person. Many default values and calculations are based on "Space Settlements-A Design Study" by NASA publications even though any error(s) belong to Web authors. There may be slight differences between the default values and the calculated values because of rounding off the numbers. All units are in metrics. See also Regenerative Life Support Systems for other calculations. For multi-component space settlement illustrations see Figure 4-2 in Space Settlements.