MoniCA is a Java-based graphical application used for viewing real-time and archival monitoring data from almost all the systems at the ATCA.

During observations, this application can show the state of each system and if there are any values that may indicate a problem. For example, MoniCA can display information about the weather conditions at the observatory, the state of the power supply and details about antenna focus. MoniCA can also play a more active role as it can help debug any issues that may occur.