Verhaert Design & Development is the prime contractor for Belgium's first satellite. The PROBA satellite is a cube (0.8 x 0.6 x 0.6 m) covered by gallium -arsenide solar cells on five faces. It is three-axis stabilized by a double-headed star tracker, GPS receiver and a set of reaction wheels with the redundancy of miniaturized fiber-optic and solid-state gyros. It will use an on-board computer for spacecraft Autonomy in orbit. A high-performance RISC processor, the ERC 32, will perform spacecraft management including Guidance, navigation, control, housekeeping and monitoring on-board scheduling and resource management.

The total cost of the PROBA project is US$14.5 million (Euro 13 million), including in the contract with The Verheart industrial team US$1.6 million (Euro 1.5 million) for ESA management and ground testing, and US$3.3 million (Euro 3 million) for the payload.