Current ADS-B aircraft tracking and positioning service relies on ground-based receivers, and transoceanic and much uncontrolled airspace traffic is not surveilled as a consequence. Space-based satellite systems solve the problem of unmonitored airspace. ADS-B Mode-S messages are autonomously broadcast, and interference by simultaneous messages can adversely impact the probability of detection (PoD). The very large field of view of a satellite creates message bottlenecks, and low PoD becomes a critical problem to solve. Multichannel ADS-B receivers can effectively address this bottleneck, improve PoD, increase update rates, and reduce latency for space-based ADS-B surveillance.