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NEAR FIELD INFRARED BACKGROUND NOISE SIMULATION
Interim engineering rept. Feb-Oct 1964
MITHRAS CAMBRIDGE MA
Pagination or Media Count:
Studies on the near field infrared background noise problem were directed toward the simulation of the infrared noise emanating from a known turbulent zone. A laboratory tool for simulating the near field noise has been designed, utilizing a simple heated round free subsonic jet as the infrared noise generator. A review of the characteristics of the hot free subsonic jet is presented and the design of the near field infrared background simulator is described. Preliminary measurements of the fluctuations in radiant emittance from the jet have been made with an AC radiometer. The data were reduced to normalized spectral density curves. The spectral density curves exhibit a more rapid decrease in energy level with increasing frequency than do spectral density curves obtained from hot wire measurements.
APPROVED FOR PUBLIC RELEASE