Using the Spectral Library

Hi All, What I am seeking to do is to replicate/verify the calculation of the various bands contained within su164j MTRDR files and apply the same calculations to spectral data of minerals from a lab so I can compare like to like thereafter. I can replicate all of the MTRDR bands I have selected from the su164j file (with convincing accuracy) via the spectral data contained in the if164j file – except for BD1900_2 and BD1900r2 and thus the reason for my post. I am wondering if anyone else has tried to replicate the same and found an error with the specified formula? I have found an error in the CRISM DPSIS when trying to replicate other bands via cross referenci…

Hi, My name is Cat and I'm and undergraduate student. I'm willing to work with I/F TRR CRISM data but I have a doubt in matter of which data should I download between the sensor S (short) and the sensor L (long). Is there any difference? My main goal is to identify minerals with spectral signatures obtained from the data, does choosing between one or another influence in the identification process? Also, after the download of all the products and derived files, which file is the one I should load to ENVI in order to start it's corrections? For example (image 1 below), is it the one contained in the "derived_files" or which one from the photo? I would really appr…

Array scanning spectrometers are becoming an important element in remote sensing, particularly for in-situ studies. Often times the data are provided as spectral libraries and not a spectral image cubes. To support conversion of individual spectra to spectral image cubes we provide an IDL script that takes individual spectra and creates the cube. To run the script download the attached file and in ENVI/IDL (standard ENVI, not Classic) run create_library_cube.pro in IDL, then run it in the IDL prompt by typing create_library_cube, param1, param2, param3 (for example: create_library_cube, 10, 10, 0) or just create_library_cube if you don’t want to specify any input paramete…

Good afternoon. I'm an undergraduate student of geomatics and remote sensing, and I was trying to use the CRISM images to classify minerals and chemical compounds on the surface of Mars. I collected some information about all the products to use, also I followed the workflow proposed here and I installed CAT on ENVI. I was trying to use a an image of the Jezero Crater data product: frt00005c5e_07_if166j_mtr3, which is projected, atmosferically and geometrically corrected. The data is on I/F which as is explained here, on the FAQs means: Q: What does I/F stand for? A: CRISM is a reflectance spectrometer, and I/F is how reflectance is represented algebra…

Hello sir, I am Priyanka Kumari PhD scholar working on CRISM data set using machine learning. The MTRDR data wavelength tab file (frt000094f6_07_wv166j_mtr3) contain wavelength for two detector ,but some band are repetitive (for example band no. 284 in VNIR detector has wavelength 1010.18nm but same band no. 284 for IR detector has 2060.04). (1)So, for band no. 284 which wavelength to consider? (2)how the image are combining that same band number has different wavelength? wavelength to consider?

I am Priyanka Kumari Ph.D. Scholar , working on CRISM DATA . I am using CAT TOOL for preprocessing of CRISM data, but I want to use DISORT model for preprocessing. How can i get DISORT model software?

Hello sir, I am Priyanka Kumari PhD scholar working on CRISM data set using machine learning. I wanted CRISM labelled data set to train the neural network model, how can I get labelled CRISM data set?

Hi, I read in a CRISM doc that following: Is there a table/document where such minimum/maximum values can be found, or is it image dependent and has to be found individually each time ?