DEIMOS-2 is the new Very-High Resolution mission from Elecnor DEIMOS. The DEIMOS-2 mission planning is implemented by the plan4EO software, which is responsible for the ground station and spacecraft (platform and payload) planning and scheduling, based on the users inputs and operator requests. Those user inputs come from the user services facility, user4EO. The mission planning software is part of the gs4EO. This state-ofthe-art product family is the result of the know-how gathered by DEIMOS in more than a decade of work for the European Space Agency, participating in the development of infrastructure and mission software, especially for Earth Observation missions and as part of DEIMOS satellite programs, DEIMOS-1 and DEIMOS-2. The main objective of the mission planning software is to maximize the commercial return of the mission. The spacecraft is characterized by its agility, imposing a number of requirements very different from those existing in lower resolution spacecraft. The main characteristics of the mission planning system are:• Advanced Automatic Planning Algorithms: selecting the most optimum sequence of observations among all the possible ones, while respecting the satellite constraints (attitude, power, data recording and downlink, etc).• Multi-user infrastructure at various levels, allowing the concurrent use of the system by different mission planning operators and the allocation of different spacecraft capacity to different users..• Remote and secured access to mission planning operations.• Quick response to emergency operations, allowing reprogramming the satellite operations in a very short time, even changing the on-board operations within the same orbit (e.g. to schedule an emergency acquisition and to download it in the same orbit).• Minimal operation costs, enabling the complete handling of all the spacecraft operations with the minimum number of operators and maintenance costs. Mission planning operations can be highly automatized, thanks to the advanced planning algorithms that are able to automatically resolve all conflicts without user intervention.• Heavy use of virtualization to simplify ground segment deployment and maintenance The planning algorithms are derived from the extensive simulation work performed by the Mission Planning and Capacity Analysis Tool that has been used as a breadboard to analyse different optimisation algorithms and select the most suitable ones for DEIMOS-2 mission characteristics. The goodness of the planning solution is evaluated by a function combining ad-hoc figures of merit that reflect the mission commercial objectives and this drives the optimisation iterative algorithm. The mission planning is supported by a state-ofthe art user interface (the Planning Exploitation Tool HMI, planET).