Use the Update segment to change satellite properties and user variables to reflect changes that occur during the mission.
Use the General tab to update all Spacecraft Configuration and Fuel Tank parameters except Tank Volume and GPS Solar Radiation Pressure. For each parameter, the Update segment can carry out the actions described in the following table:
| Action | Description |
|---|---|
| Add value | Add the quantity entered in the Value column to the current value for this parameter. |
| No change in value. | Leave the current value for this parameter unchanged (ignoring any quantity that may appear in the Value column). |
| Set to new value | Replace the current value for this parameter with the quantity entered in the Value column. |
| Subtract value | Subtract the quantity entered in the Value column from the current value for this parameter. |
Use the User Variables tab to edit the values of user variables that have been defined for the mission.