The Spacecraft Environmental Anomalies Expert System – Real Time (SEAESRT) is a set of data-driven algorithms that indicate the likelihood of an environment-related anomaly on a geosynchronous satellite. The target customers are operators of geosynchronous satellites who can benefit from guidance on the hazard levels during active space weather conditions to make decisions on the operation of their satellites, as well as to assess the possible causes of anomalies that have occurred.

SEAESRT gives hazard levels at geosynchronous orbit for four common types of satellite problems: surface charging, internal charging, single event upsets, and total dose effects. For each of these four hazard types, the software gives a hazard quotient that represents the probability that the current environmental conditions will result in a satellite anomaly, relative to the long-term average likelihood of an anomaly. A hazard quotient of unity indicates the likelihood of an anomaly is equal to the long-term average.

All of the hazard quotients are derived from the statistical occurrence of on-orbit anomalies or their proxies. It is assumed that the probability of future anomalies has the same statistical relationship to the environmental conditions as the historical anomalies.