Optical signatures of particles in space

B. David Green

doi:10.1117/12.140723

18 December 1992 Optical signatures of particles in space

B. David Green

Proceedings Volume 1754, Optical System Contamination: Effects, Measurement, Control III; (1992) https://doi.org/10.1117/12.140723
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Spacecraft-produced contamination in the optical viewing path surrounding the sensor will obscure or degrade the far-field observations. We present the predictions of the radiances and their spectral distributions produced by particles surrounding orbital spacecraft. This paper emphasizes the composition dependence of the scattering signature. Predictions are presented for likely contaminant species and size distributions modeled and observed on previous space observations. Predictions for silver, aluminum, alumina, carbon, carbon dioxide and water ice, silicon dioxide, and titanium dioxide are presented. The wavelength-dependent scattering indices produce spectrally structured radiances. The balance between earthshine and solar illumination in their wavelength-dependent emissivity produces size-dependent temperatures and spectra.

Citation Download Citation

B. David Green "Optical signatures of particles in space", Proc. SPIE 1754, Optical System Contamination: Effects, Measurement, Control III, (18 December 1992); https://doi.org/10.1117/12.140723

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