À propos

TMLook a multi functional analysis and interpretation tool devoted to the satellite experiment LANDSAT

Authors: L. Gonzalez ¹, E. Vermote ², Robert E. Wolfe³
1 Laboratoire d'Optique Atmosphérique, CNRS-USTL1, Villeneuve d'Ascq, France
2 University of Maryland / MODLAND GSFC-923
3 Laboratory for Terrestrial Physics at NASA GSFC-922 and Raytheon ITSS

TMLook is able to handle some of the different user format distributions for LANDSAT TM programs
(We just need to get more distribution format examples to complete the software)
The main functionalities offered by TMLook are :

• Direct display of images and ancillary data and file header
• Radiometric calibration from ancillary calibration data
• Dump of selected data as binary files (calibrated or raw)
• Basic functions for enhance images, scatter plot, transect and histogram for user-defined areas
• The software allows you to visualize the file values as images using the native projection
• An atmospheric corrected colour composite image using bands 0.4, 0.5, and .6 m as blue, green, red is provided, to facilitate the image analysis
• It also performs a tool to reproject images in linear projection
• A communication layer is implemented in the software and can be interfaced with virtually open networked database. Currently, the AERONET database located at LOA and GSFC are accessible and can be called to get for a particular pixel of an image, the aerosol optical thickness or Angström coefficient reported by a network of automounted sun photometers distributed over the globe. Such a functionality allows aerosol users to directly compare their results to AERONET database
• Lastly, a particular effort has always been to produce an efficiency and portable software

This software is a first step to visualize LANDSAT TM products. Its very simple C and XWindows architecture allows the developers to add any useful user adding or remark. Bring us your experience and contact the authors ...

Perspectives

First results of this software are promising and future steps to improve this software will be :

• Atmospheric corrections (molecular signal and absorbing gases) applied to images,
• Improvement in RGB image composite,
• Intercomparison with other platforms (POLDER - MODIS),
• Inclusion of physical methods to retrieve aerosol properties, to compare directly with AERONET network database resultss