[ncl-talk] Plotting CALIPSO 532nm total backscatter coefficient

[Srishti Dasarathy]

Dear ncl talk,

I’m a beginner with NCL, and I would greatly appreciate your advice
regarding plotting the 532nm total backscatter coefficient from CALIPSO.
I’ve attached my script to this message, which I modified from the script
posted on http://www.ncl.ucar.edu/Applications/calipso.shtml under the
heading calipso_3.ncl.

So far, I have not yet been able to construct my plot. Theoretically, I
have all the values that I need: Lat/Lon, the total backscatter
coefficient, and the altitude value which I extracted from the metadata. I
have tried to troubleshoot my script, and examples of errors I received
included errors with dimension mismatch between altitude heights and total
backscatter coefficient. After I fixed that, it gave new errors complaining
about the matched dimensions, etc.

The first major error occurs at line 101:

TBC_532&hgt =  hgt ;

Here, TBC_532 is total backscatter coefficient and hgt is my altitude
height. Once NCL hits this line, it gives me the following error:

*fatal:Coordinate variables must be the same dimension as their dimension*
*fatal:No coordinate variable exists for dimension (hgt) in variable
(TBC_532)*

Afterwards, I changed the hgt dimensions to match the total backscatter
coefficient dimension size (2 dimensions, 4224 * 399), but that also didn't
work. I then collapsed both into a 1D array, but then it didn't allow me to
plot either, and gave me the error:

*Error: scalar_field: If the input data is 1-dimensional, you must set
sfXArray and sfYArray to 1-dimensional arrays of the same length.*
*warning:create: Bad HLU id passed to create, ignoring it*

If possible, could you give me some advice on how to move forward with my
script?

Thanks again,
Srishti

-- 
Srishti Dasarathy
Graduate Student
Scripps Institution of Oceanography
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