Limb Radiance Infrared Spectrum at 12 km Tangent Height

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Limb radiance at 12 km tangent height is the spectral radiance emerging from the edge of the atmosphere viewed along a line of sight which passes 12 km above the surface, thus excluding any surface emission and the bulk of tropospheric water vapour.

Spectral radiance is the radiant flux (electromagnetic energy emitted per unit time) from a surface per unit solid angle per unit area per unit frequency. The units here are nW/(cm2 sr cm-1).

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