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cmckinla's Achievements


Newbie (1/14)

  1. Hello, Is it normal to see alot of striping within a trr3 image after running the volcano scan? I understand that cirrus operations are not required for most trr3 scenes, but I feel I may need to apply another operation to remove the prevalent striping within the image. However, the cirrus operations produce an image which is completly blank (black). I have been able to reproduce a somewhat similar image shown in the browse product section of the 0000CE1D image by applying the max /min pixel values specified in the the 'Map/Stretch info' section for the 'ir_maf' browse product of the 0000CE1D scene. However, this image also has additional hazy blue lines which do not show up in the official browse product shown on the website. Any help would be much appreciated! Regards, Colin
  2. Hello, I am having an issue getting my RBG images to look similar to the IR derived product (ID: 0000CE1D) which shows Mafic minerology from the CRISM data products page. I have converted the image from pds to CAT, performed a photometric correction and performed a volcano scan. Once these corrections were made I created my summary products for the corrected image. I have loaded OLINDEX into the red, LCPINDEX into the green and HCPINDEX into the blue. Areas which have shown up dark purplish blue in the IR derived products page for mafic minerology represent high -Ca pyroxene. However, these areas show up as a bright greenish cyan colour which resembles more of a low-Ca pyroxene when I load in the summary parameters myself. Any insight/assistance would be much appreciated! Regards, Colin
  3. Thanks for your help Frank. I have resolved the issue to an extent. I can now make sense of the spectral profile for each pixel. However, I have run the volcano scan like you said (Division by scaled volcano observation - Empirically optimized for this observation) but I seem to still be getting a spike at the 2.7 micron wavelength. Should I try replacing the empirical optimization parameter with a different option in order to reduce this spike? Colin
  4. Hello, I am a student who is very new to working with CRISM and CAT/ENVI software. I am trying to look up the spectral profile of pixels within a CRISM image of the Endeavour crater. The Observation ID of this image is FRT0000CE1D_07_IF166L_TRR3. The image has been converted to CAT from PDS. As well, a photometric correction (division by cos(i)) was applied to the trr3 image prior to looking up the Z profiles. I have not run any other corrections as is has been mentioned in other forums that trr3s have been cleaned before being available to the public. henever I bring up the spectral profile for any pixel within the image the x axis values are shown backwards (3.5 - 1.5). As well, the actual profile itself looks like a a sharp spike around the 2.75 micron region but drops down to 0 again. I have a project I must finish by next week. Please respond asap if you know what steps i am missing! Regards, Colin
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