Extracting DN valuesfrom Radar Imagery - NV5 Geospatial

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Last Post 04 Jun 2014 12:04 AM by anon

Extracting DN valuesfrom Radar Imagery

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anon

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04 Jun 2014 12:04 AM
Hi, I'm working on radar imagery. I need whole DN values (in grid format) from radar imagery to perform some calculation in spreadsheet. I've tried file-save file as-ascii file, but the values of DN is 0 for every pixel, which is impossible. Is there another way to get it? Thanks for your help Regards, Olivia

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09 Jun 2014 02:26 PM
I am guessing that the results you are seeing are a result of the SAR data pixel values being complex data values. ENVI's handling of complex data has changed a bit from version to version, so it would be helpful to know exactly which version of ENVI you are using. Also, it would be helpful to know what type of Radar product this is. You may want to contact Exelis Tech Support or your local distributor directly. If you can share your radar data and the exact steps you are following, starting with how you import the data to ENVI, that would probably be the most efficient way to figure out why you are getting pixel values of 0 output to your ASCII file from ENVI. Peg Exelis Tech Support

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15 Jun 2014 11:49 PM
I am using ENVI 4.8, working on ALOS PALSAR data. Please help me, thank you

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