ReSe Applications LLC provides Remote Sensing Software Applications for processing of multispectral and hyperspectral images.

News and Press Releases

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March 26th, 2018: New release of ATCOR-3
ATCOR-3 version 9.2 is now available

What's new:

  • Spectral response functions of Sentinel S2A and S2B were updated requiring an update of the atmospheric LUTs.
  • Batch and GUI modules were added for the processing of PlanetScope and TripleSat imagery. The Chinese Gaofen series is supported (GF-1, GF-2).
  • A new function is added to sort out auxiliary inputs layers such as illumination maps, AOT distribution and water vapor distribution.
  • The image based shadow detection method has been adapted and improved.
  • The aerosol optical thickness (AOT) retrieval based on dark dense vegetation DDV is improved. If water areas in the scene require a lower AOT than the dark reference (DDV) areas (to prevent negative surface reflectance), then separate AOT maps are calculated for the reference and water areas, which are finally merged.
  • For rugged terrain, the correction of the adjacency effect is modified using at-sensor radiance instead of the former method with surface reflectance. This yields better results in combination with shadow correction. For flat terrain, the former method is retained, because the difference between both approaches is negligible.
  • The cirrus removal algorithm has been updated: the calculation of the cirrus parameter is replaced with a numerically more stable algorithm.
  • The dehazing algorithm (combined with decirrus) is improved:
    (a) it supports processing of hyperspectral imagery (formerly restricted to multispectral), (b) dehazing over water is switched off as if it often leads to overcorrection of water pixels, (c) the accuracy of the dehaze map to classify water pixels is improved if DEM data (slope) is available.
  • A quality confidence layer file (’scene atm qcl.bsq’) is available for an input ’scene.bsq’. The quality depends on the solar zenith angle (SZA) and aerosol optical thickness at 550 nm. In mountainous terrain, the local SZA is used. No quality confidence layer file will be written for a flat terrain scene and constant visibility.
  • A new function is added to adjust image brightness empirically to correct for cloud shadow variations in conjunction with image mosaicking.
  • Scenes with a solar zenith angle up to 75 degrees can be processed.
  • The coordinate system support has been improved for better compatibility to ENVI standards.
  • The import of global elevation data and geographic lat/lon elevation files has been updated for a better conversion to metric coordinate systems (UTM and others).
  • The image import function has been updated and a new image file conversion routine has been added to support the transformation of geographic Lat/Lon data to local metric coordinate systems.
  • The image display routine has been improved and new empirical correction and analysis methods have been included (change detection, dark target correction, empirical line correction).


March 8th, 2018: New release of ATCOR-4
ATCOR-4 version 7.2 is now available

What's new:

  • The shadow and aerosol optical thickness (AOT) correction algorithm (SHAOT) has been included. It can best be applied to high spatial resolution imagery (< 5 m) imagery for atmospheric correction of spatially variable aerosol scattering effects (compare title page).
  • The image based shadow detection method has been adapted and improved in support of the SHAOT method.
  • A new function is added to sort out auxiliary inputs layers such as illumination maps, AOT distribution and water vapor distribution.
  • The aerosol optical thickness (AOT) retrieval based on dark dense vegetation DDV is improved. If water areas in the scene require a lower AOT than the dark reference (DDV) areas (to prevent negative surface reflectance), then separate AOT maps are calculated for the reference and water areas, which are finally merged.
  • For rugged terrain, the correction of the adjacency effect is modified using at-sensor radiance instead of the former method with surface reflectance. This yields better results in combination with shadow correction. For flat terrain, the former method is retained, because the difference between both approaches is negligible.
  • The dehazing algorithm (combined with decirrus) is improved:
    (a) it supports processing of hyperspectral imagery (formerly restricted to multispectral), (b) dehazing over water is switched off as if it often leads to overcorrection of water pixels, (c) the accuracy of the dehaze map to classify water pixels is improved if DEM data (slope) is available.
  • A quality confidence layer file (’scene atm qcl.bsq’) is available for an input ’scene.bsq’. The quality depends on the solar zenith angle (SZA) and aerosol optical thickness at 550 nm. In mountainous terrain, the local SZA is used. No quality confidence layer file will be written for a flat terrain scene and constant visibility.
  • A new function is added to adjust image brightness empirically to correct for cloud shadow variations in conjunction with image mosaicking.
  • Scenes with a solar zenith angle up to 75 degrees can be processed.
  • The coordinate system support has been improved for better compatibility to ENVI standards.
  • The import of global elevation data and geographic lat/lon elevation files has been updated for a better conversion to metric coordinate systems (UTM and others).
  • The GEOTIFF import function has been updated and a new image file conversion routine has been added to support the transformation of geographic Lat/Lon data to local metric coordinate systems.
  • The image display routine has been improved and new empirical correction and analysis methods have been included (change detection, dark target correction, empirical line correction).


February 18th 2018: New release of PARGE
PARGE version 3.4 is now available

The new version of PARGE supports a completely revised coordinate system conversion system, cross reference boresighting and more:

What's new:

  • Completely renewed coordinate system conversion functionality, based on ESRI/EPSG coordinate system definitions.
  • Updated Global/Geographic DEM import functions including conversion to local coordinate system.
  • New cross reference boresighting capabilities for self-consistent boresighting of overlapping image acquisitions in a cross-pattern
  • Improved automatic boresighting capabilities on Ortho images.
  • Batch processing improvements for standard systems based on ASCII batch configuration file (without need of IDL programming)
  • Optimized support for Hyperspec Nano system, including full batch support
  • New Quicklook generating function
  • Updated UNDO/REDO command (up to 10 undo steps based on internal data structure).
  • GUI updates: removed dynamic resizing, better button alignments, better image display.
  • Updated manual with description of all new functions.
  • .... many other minor updates


Nov 8th, 2016: New release of ATCOR-4
ATCOR-4 version 7.1 is now available

What's new:

  • The high-spectral resolution atmospheric database 'atm database' was re-compiled based on MODTRAN5.4.0, including the 4 km surface elevation as a new grid point. It is recommended that users update the database as well as sensor-specific 'atm_lib' using the RESLUT module.
  • The tiled/batch processing can now be started from GUI including a console output.
  • Import of global DEMs has been improved such that it may be selected based on UTM coordinates.
  • A new import function for AISA data sets has been added
  • Online installation has been improved and adapted to new needs. Software startup calls are now logged on a ReSe Server to keep track of licensing (as long as an internet connection is active).
  • The haze removal ('dehaze') and cirrus removal ('decirrus') modules have been improved.
  • The ATCOR GUI supports the input of a negative visibility. This means the visibility is not changed during processing.
  • Added empirical correction options to ENVI file viewer.
  • A batch module is available to calculate the water vapor map, provided the corresponding '.inn' file exists. Previously, it was only available in the GUI mode.
  • An external aerosol optical thickness map (AOT550nm) is supported. If the file name of the input scene is 'scene_xxx.bsq', then the external AOT map should be named 'scene_xxx_aot550.bsq', and it replaces the internal visibility/AOT calculation.
  • Optional scene-dependent scaling of path radiance in the blue-green spectral region is possible for constant visibility.


Sept 14th, 2016: New release of ATCOR-3
ATCOR-3 version 9.1 is now available

What is new in the 2016 version:

  • The high-spectral resolution atmospheric database 'atm database' was re-compiled based on MODTRAN5.4.0, including the 4 km surface elevation as a new grid point.
  • Batch modules are available for the import of Landsat-4/-5, Landsat-7, Landsat-8, Sentinel- 2, RapidEye, Worldview-2, DMC, SPOT-4 to SPOT-7, and Pleiades data, see chapter 9.6. These runs can also be started with the 'File', 'Import' from ATCOR's graphical user interface (GUI).
  • An improved syntax allows batch calls from system console for complete scene processing.
  • Online installation has been improved and adapted to new needs. Software startup calls are now logged on a ReSe Server to keep track of licensing (as long as an internet connection is active).
  • ATCOR can be started from the GUI or a batch run for the above sensors can be started, e.g. 'landsat8 batch' or 's2 batch', which optionally includes dehazing.
  • For the batch processing of Sentinel-2 data it is recommended to use the 's2 batch' module, which accounts for the angular variation of solar and view geometry over the scene.
  • The haze removal ('dehaze') and cirrus removal ('decirrus') modules have been improved. If a narrow cirrus channel at 1.38 μm exists, the effect of cirrus clouds is also removed during the 'dehaze' run. Optionally, the 'dehaze' now performs a joint decirrus / dehaze, where the decirrus algorithm is executed first, followed by the dehaze.
  • The ATCOR GUI supports the input of a negative visibility. This means the visibility is not changed during processing.
  • A batch module is available to calculate the water vapor map, provided the corresponding '.inn' file exists. Previously, it was only available in the GUI mode.
  • An external aerosol optical thickness map (AOT550nm) is supported. If the file name of the input scene is 'scene xxx.bsq', then the external AOT map should be named 'scene xxx aot550.bsq', and it replaces the internal visibility/AOT calculation.
  • Optional scene-dependent scaling of path radiance in the blue-green spectral region is possible for constant visibility.