Hi Kevin, re: > I'm working with these raw products (e.g. WMO ID TIGN27). While I can > display them fine with programs such as McIDAS, I am thus far at a loss to > discover a means of converting the raw pixel data to pressure units. > IMGPROB output reveals data in four units: RAW, BRIT, VIP, and ECHO. > The three former units appear to be just the raw pixel values and are > equivalent. ECHO is in DBZ. You have discovered a bug in the server for these data products. I will need to find the bug and fix it in a McIDAS addendum. > Any ideas as to how to extract the pressure > level of the detected cloud tops? Yes. The mapping of RAW/BRIT values (they are the same for these products) to cloud top pressure [mb] is defined by the CTP.ST stretch table that is included in Unidata McIDAS. Here is a listing of CTP.ST: SU TABLE CTP BREAKPOINTS STORED IN TABLE : CTP.ST INPUT OUTPUT ----- ------ 150 255 950 76 CALIBRATION TYPE : CTOP CALIBRATION UNITS : mb BAND NUMBER : -1 INTERPOLATION TYPE: LIN SU: DONE I have included a McIDAS GIF image of a NOAAPort GINI West CTP product that is annontated with a data bar that graphically shows the relationship between display values (colors) and pressures. > I have looked for the analagous AREA format product (product code "CA") on > our UNIWISC feed, but it appears this is not being received (we are, > though receiving most other Sounder products on that LDM feed). Hmm... I had not realized that the CTP products had stopped being sent in the Unidata-Wisconsin datastream. This is another thing I will need to investigate. > Thanks! No worries. Thanks for reporting the problems! 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: NJD-528776 Department: Support McIDAS Priority: Normal Status: Closed
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