Community Satellite Processing Package

  HYDRA2 Multispectral Data Analysis Toolkit Version 1.0 Release

19 March 2014

The University of Wisconsin-Madison SSEC is pleased to announce the release of the HYDRA2 Multispectral Data Analysis Toolkit for the visualization and analysis of JPSS Suomi-NPP and NASA EOS Aqua and Terra instrument data. This package is in support of Direct Broadcast users, and is co-sponsored by the NOAA Community Satellite Processing Package (CSPP) and the NASA International MODIS/AIRS Processing Package (IMAPP).

The HYper-spectral data viewer for Development of Research Applications version2 (HYDRA2) has been developed to assist research and development of remote sensing applications as well as education and training of remote sensing scientists. It provides a fast and flexible interface that allows users to explore and visualize relationships between sensor measurements (displayed as brightness temperatures for infrared and reflectances for visible and near infrared) and wavelength (or wavenumber) using spectra diagrams, cross sections, scatter plots, multi-band combinations, and color enhancements on a pixel by pixel basis with full access to the underlying metadata of location and time. HYDRA2 enables interrogation of multispectral (and hyperspectral) fields of data so that
  • pixel location and spectral measurement values can be easily displayed;
  • spectral bands can be combined in linear functions and the resulting images displayed;
  • false color images can be constructed from multiple spectral band combinations;
  • scatter plots of spectral band combinations can be viewed;
  • pixels in images can be found in scatter plots and vice versa;
  • transects of measurements can be displayed, and
  • soundings of temperature and moisture as well as spectra from selected pixels can be compared.
The instruments supported for analysis are:
  • Aqua: MODIS and AIRS
  • Terra: MODIS
  • MetOP-A and B: IASI
Supported computer platforms are:
  • Apple OS X
  • Microsoft Windows
  • Intel Linux
The release consists of the software, a document describing the capabilities of the toolkit including a summary of HYDRA2 commands in Appendix 2, and a lab exercise introducing users to HYDRA2 by examining VIIRS and MODIS observations over Korea.

The software is freely distributed under the terms of the GNU Public License Version 3.