JCATvis

This is a modified version of the Java CRISM Analysis Tool (JCAT), specialized for analyzing visual bands of MTRDR images.

Forked from https://github.com/JHUAPL/JCAT

Originally based on: http://crism.jhuapl.edu/JCAT version 1.0.2 released Jan 14 2020

Modified to add custom I/F correction in the 380 - 1100nm VNIR range as that range is TOA I/F (top of atmosphere reflectance calibrated). Only 1100 - 3900nm uses true I/F in the original JCAT, based on volcano scan in JCAT.

Runs on JavaFX 8 and 17, for example Zulu JRE FX 17.

usage: ./jcatvis.sh [-c CALFILE] IMGFILE [IMGFILE...]
  -c CALFILE: CVS file to read spectrum of white surface for calibration from.
              Example: src/main/resources/resources/calib/frt000128f3_07_if165j_mtr3_spectrum_soil.csv
  IMGFILE: MRO CRISM *_if*_mtr3.img file(s)

Map-based search to download CRISM hyperspectral Images: https://ode.rsl.wustl.edu/mars/mapsearch

You need the following set of data files for each MTRDR hyperspectral map-projected image to load:

• *_if*_mtr3.img
• *_if*_mtr3.lbl
• *_wv*_mtr3.tab

While the original JCAT also loads non-map-projected TRDR data sets (*if*s_trr3.img), this modified version only supports map-projected MTRDR.

Example:

• hrl0000d349_07_if182j_mtr3.img
• hrl0000d349_07_if182j_mtr3.lbl
• hrl0000d349_07_wv182j_mtr3.tab

JCATvis is a free analysis tool for Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) data products. It is released under the MIT license.

Installation

Clone this repository from the command line:

> git clone https://github.com/isenberg/JCATvis.git

In the cloned folder ('JCATvis'), run the mkPackage.bash script:

> ./mkPackage.bash

This script will create two tar files in the 'dist' directory. Expand that tar file either in a finder window or via command line:

> tar -xvzf ./dist/JCATvis-XXXX.XX.XX.tar.gz

Open runJCAT in your corresponding OS via finder window or command line to start using JCATvis:

> ./JCATvis-XXXX.XX.XX/unix/runJCAT

Tutorial / Documentation

There is a tutorial PDF available when running JCAT. Under the Help tab, click on the Tutorial button to open the document.

The Show Log button is useful for debugging.

For true color hyperspectral images: https://github.com/isenberg/improved-color-from-crism