NASA NTRS · 19770000176
Active-cavity radiometer/pyroheliometer
Abstract
Device, using specular black cavity heater, temperature sensors, and electronics and electrodeposited cavity/thermal impedance structures, can achieve + or - 0.1 percent long-term absolute uncertainty at solar constant level. Dual-cavity configuration helps decrease sensitivity for heat-sink temperature drift.
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Willson, R. C.. 1977-09-01. Active-cavity radiometer/pyroheliometer. https://ntrs.nasa.gov/citations/19770000176
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