Plotting Total Backscatter Coefficient 532

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salbloos27
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Plotting Total Backscatter Coefficient 532

by salbloos27 » Tue Feb 06, 2024 3:18 pm America/New_York

Hello,

I am trying to plot the total backscatter and I used one of the example codes from the website however, my plot doesn't seem right and I can't fix it.
the problem I am facing is that the plot has a lot of gaps and is flipped to the altitude. no data is plotted from 0 - 15 km altitudes.


this is the file's name 'CAL_LID_L2_05kmAPro-Standard-V4-51.2018-04-17T22-24-37ZN.hdf'

Please help.

I got the example from here viewtopic.php?t=4222
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ASDC - cheyenne.e.land
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Re: Plotting Total Backscatter Coefficient 532

by ASDC - cheyenne.e.land » Wed Feb 07, 2024 8:18 am America/New_York

Hello,

Thank you for your interest in CALIPSO data.

It appears that there is nothing wrong with your plot. You can verify this if you open the file in Panoply. Looking at the data there is a lot of fill values especially in the lower altitudes like you mentioned (0 - 15 km).

Regards,
ASDC

salbloos27
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Re: Plotting Total Backscatter Coefficient 532

by salbloos27 » Thu Feb 08, 2024 5:50 am America/New_York

It doesn't look right to me, when plotting line plot for each of the data of total backscatter vs. altitude we can see that in lower altitudes there are a lot of values. also the quick looks in CALIPSO website shows something different than what I got.
if there is any code that I can use to plot the backscatter please provide it to me.


Thank you,

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Re: Plotting Total Backscatter Coefficient 532

by ASDC - cheyenne.e.land » Thu Feb 08, 2024 11:02 am America/New_York

Hello,

That user specifically wanted to subset the data at a specific range of latitudes.

Here is what the plot looks like when graphed at all latitudes:
Image

Here is what the plot looks like when opened in Panoply (note: it is flipped). Panoply is a Panoply plots geo-referenced and other arrays from netCDF, HDF and other datasets.
Image

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