Downwelling Spectral Solar Irradiance and IR Radiance Measurements ATMS 360 Spring 2008 Preliminary Results.

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Presentation transcript:

Downwelling Spectral Solar Irradiance and IR Radiance Measurements ATMS 360 Spring 2008 Preliminary Results

IMAGES

IMAGES HALO

Radiance: Watts / (m2 Sr)

Irradiance and Radiance

5 a.m. local time Sounding Reno

5 p.m. local time Sounding Reno

FTIR Radiance

FTIR Radiance

FTIR Radiance: Atmospheric IR Window 13 microns 8 microns

Radiance in the Window Region Time Condition Window Region Irradiance (W / m2) 07:13 Clear 28.3 13:21 Cirrus 41.8 15:30 Altocumulus and Cirrus 90.1

DEFINITION OF THE BRIGHTNESS TEMPERATURE TB Measured Radiance at wavenumber v = Theoretical Radiance of a Black Body at temperature TB

FTIR Brightness Temperatures

Normalized Solar Irradiance

Water Absorption Coefficient http://www.lsbu.ac.uk/water/vibrat.html

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