SatMet Home PageTwo GOES-8 sounder retrieval profiles were perturbed by adding various amounts to the temperature and dewpoint depression at various levels. This is to demonstrate the sensistivity of different channels to different levels in the atmosphere.
Sounder retrieval examples:
Weighting functions (the layers of energy contribution) for channels 1-5 and 10-12:
A bar chart of GOES-8 Sounder calculated brightness temperatures (deg K):
DRY:
Here are bar graphs showing the brightness temperature differences (experimental minus control) for bands (2-8,10-12) for the 'dry' profile. These are differences from the control and the values calculated from the perturbed profile. So, a positive value means the affect of the change was to warm the brightness temperature.
The temperature profile was increased (warmed) by 10 degrees:
The dewpoint depression profile was increased (dried) by 10 degrees:
WET:
Here are bar graphs showing the brightness temperature differences (experimental minus control) for bands (2-8,10-12) for the 'moist' profile. These are differences from the control and the values calculated from the perturbed profile.
The temperature profile was increased (warmed) by 10 degrees:
The dewpoint depression profile was increased (dried) by 10 degrees:
The following images demonstrate the response of each GOES-8 sounder spectral band to upwelling radiation detected at 1146 UTC on 6 March 96:
NGM Model fields, valid 12UTC on March 6th:
Brightness Temperature Line plots from Montana to the Gulf of Mexico:
An array of brightness temperatures over Atlanta, GA:
Sample derived product images from the GOES-8 Sounder:
