Constellation Modeling and Optimization Framework Design

You are tasked with designing an intelligent mission planning system for an Earth observation satellite constellation. Outline your approach to mathematically model the satellites (orbital parameters, sensors, fuel), ground stations (locations, contact windows), and observation targets (locations, priorities, time windows). Describe the optimization framework you will use (e.g., mixed-integer programming, heuristic search) to generate a schedule that maximizes observation value while respecting all physical and operational constraints. How will `Sacred` be integrated from the beginning to ensure all your design choices and experimental results are tracked?