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Hi, re: > The reason I ask this is because I want do something like what was done on > this paper. Using the same criteria. Would I be able to do that later on? Yes, you should be able to do this after learning more about how to use McIDAS. re: > FIG. 1. GOES-12 3.9-?m reflectivity for brightness temperatures less than > ?40°C (in colors), and 10.7 ?m (gray shades) for brightness temperatures > greater than > ?40°C for (a) 2345 UTC 6 Jun 2005 and (b) 2315 UTC 18 Jun 2003. Warmer colors > indicate > cold cloud tops with larger 3.9-?m reflectivity values. This figure seems to represent a combination of the 3.9 um and 10.7 um channels from GOES-12, such as can be produced by the IMGOPER command. The first question that needs to be answered is how the two wavelength channels were combined to produce the composite. Does the article that the figure comes from describe how the author combined the wavelength channels? Second question, what is the reference for the paper you are referring to? Cheers, Tom -- **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: BJT-176673 Department: Support McIDAS Priority: Normal Status: Closed