SOFTWARE DESIGN



Onboard software is used by ACP's microcontroller to execute the automatic sequences, monitor the status and health of the various subsystems, acquire and interprete TC and format data for TM. Its main functions are to control the mechanical subsystem, collect data and transmit it to the Probe system, provide an interface to command ACP via the Probe, and perform descent measurements synchronised with the rest of the Probe.

ACP's software provides four different operational modes: descent; cruise checkout; ground test mode; engineering mode. The first three execute automatically on receipt of the appropriate mission flag and time. The engineering mode is selectable by a specific TC, and is used mainly for integration and test phases. In this mode, all ACP functions can be activated individually by sending the appropriate TC. It is accessible during any automatic sequence. It can also be used to check specified mechanical devices during cruise should any problem arise.


Back to previous page

Questions & Comments to ACP Team