January 20, 2017

Concept

The Declic facility is designed to provide maximum autonomy while using minimum interfaces with the EXPRESS rack. Declic takes advantage of resources delivered by the EXPRESS system.

The Declic facility provides power conditioning, communications, command/control, data storage and multiple flexible optical capabilities in support of each experiment.

The Declic facility is operated from CADMOS, the French User Support and Operation Centre (USOC) located at CNES in Toulouse, France.

Only minimal crew intervention is required to set up the facility with the insert, to be operated a minimum of 4 to 6 months per year in order to justify its permanent installation on board the ISS for a minimum of 2-3 years.

For this, a minimum set of two or three inserts resides on orbit and are used during most increments to enable science operations to the greatest extent possible during such an extended period.

Exchange of experiments is foreseen, but the frequency of exchanges will depend on access to schedule, launch, retrieval and on-orbit stowage resources.

So far, the DSI and HTI experiments are finished and the inserts have been returned to Earth. Only ALI is still on board the ISS, and the experiments have been completed up to the 7th series.

The Declic facility is designed to run automatically thanks to its resident tasking capability. Experiment telecommanding is foreseen for telescience operations to enable near-real-time interaction with the flight experiment when possible and requested. Telecommanding allows experiment sequence parameters to be modified, partially or totally, depending on scientific analysis on the ground.

Data transmission to ground is shared with other users. Image storage on Declic hard disks is foreseen and removable hard-disk drives are implemented to permit the recording of a large amount of data which have been prioritized for recovery when the astronauts return to Earth.