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Sun Sensor Test Stand
Sun Sensor test stand

A manufacturer of satellite sun-angle sensors was performing testing using a simulated sun, and was finding that the test results were not repeatable. We audited the test stand, and found problems with electrical noise from the arc lamp power supply, 60 Hz optical ripple, and light uniformity. A new optical layout was designed, improving uniformity by a factor of three, while increasing the light output substantially. The 60 Hz ripple was eliminated by a simple change in sample timing, and the electrical noise was reduced by re-working the grounding and shielding arrangements.