Re: reading raw calipso data in NCL

Hi, Joe
Thanks for your reply. At this time, I'm most interested in Calipso Vertical Feature Mask (VFM) and reading the associated variable 'Feature_Classification_Flags' from the hdf file, eg., CAL_LID_L2_VFM-ValStage1-V3-02.2011-12-31T23-18-11ZD.hdf . NCL reads this variable as an unsigned short. However, in order to extract the correct flag, which should be a single value, it appears the data need to be bit interpreted. I'm not sure how to do this correctly in NCL. If you have any luck unpacking and or plotting up the data in NCL, please let me know. Right now, I'm trying to setup a temporary workaround with Matlab, via the code released by NASA, to extract the data correctly -- not an ideal solution.

thanks again,
Matt

________________________________________
From: H. Joe Lee [hyoklee@hdfgroup.org]
Sent: Tuesday, July 23, 2013 7:13 PM
To: Matthew Fearon
Subject: Re: reading raw calipso data in NCL

Hi, Matt!

  I'm also interested in plotting HDF CALIPSO data and post it under
our website [1] but I'm wondering if you could provide the specific
NASA HDF product name (e.g.,
CAL_IIR_L1-Prov-V1-11.2008-08-20T01-40-12ZD.hdf) that you're mostly
interested in.

 Thanks,

[1] http://hdfeos.org/zoo

--
HDF: Software that Powers Science
On Mon, Jul 22, 2013 at 2:56 PM, Matthew Fearon <Matthew.Fearon@dri.edu> wrote:
> Dear NCL users:
>
> Just curious if anyone has developed an NCL script to read raw Calipso data,
> particularly vertical feature mask, in hdf format and make a plot? I see
> there are a couple examples here:
> http://www.ncl.ucar.edu/Applications/calipso.shtml , but they are using a
> processed form of the data. Any assistance would be much appreciated.
>
> thanks,
> Matt
>
>
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