Short Course on Satellite Meteorology
AMS 78th Annual Meeting
11 January 1998 Phoenix, Arizona
GOES Transmittances and Weighting Functions
Transmittance: Percent of radiation of particular
wavelength transmitted through the atmosphere.
Transmittance = 1- Emmisivity
Weighting Function: Derivative of transmittance
with respect to height (ln Pressure). Larger values
correspond to atmospheric layers with the greatest contribution to
radiance values.
Longwave Channels
Mid-wave Channels
Shortwave Channels
Example: 3 GOES Sounder Longwave Channels
GOES Sounder Longwave Channels - Weighting
Functions
Weighting Functions = dT/dlnP
where T = Transmittance, and P = Pressure
Labels for each curve include GOES sounder channel number, and
central wavenumber (cm-1)
GOES Mid-wave Sounder Weighting Functions
Weighting Functions = dT/dlnP
where T = Transmittance, and P = Pressure
Labels for each curve include GOES sounder channel number, and
central wavenumber (cm-1)
GOES Shortwave Sounder Weighting Functions
Weighting Functions = dT/dlnP
where T = Transmittance, and P = Pressure
Labels for each curve include GOES sounder channel number, and
central wavenumber (cm-1)
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