What station-keeping maneuvers are required for GEO satellites?

GEO satellites must maintain position within assigned orbital slot (typically +/-0.05 to 0.1 degree). Perturbations requiring correction: North-South (N-S) drift - Sun/Moon gravitational pull causes inclination growth (~0.75-0.95 deg/year), requires inclined burns ~50 m/s/year; East-West (E-W) drift - Solar radiation pressure and Earth triaxiality cause eccentricity and longitude drift, requires ~2 m/s/year. Station-keeping strategy: N-S: Periodic burns to correct inclination (or inclined orbit operation to save fuel); E-W: Periodic burns to correct longitude and eccentricity. Maneuver planning: Ground analysis of orbital state, Burn planning to optimize fuel usage, and Collision avoidance coordination with neighboring satellites. Electric propulsion reduces propellant mass but requires more frequent, longer burns. End-of-life: Boost to graveyard orbit (~300 km above GEO) to clear orbital slot.