DIRSIG

So long DIRSIG4 ... We are marking the end of the dedicated DIRSIG4-only releases with a final build and packaging of DIRSIG4 using the heritage build hosts that have been producing the DIRSIG4 releases for years. If you have been using DIRSIG4 exclusively, then consider this the final release that has the same end user operating system assumptions. To obtain a copy of this final heritage release, navigate to the "Final DIRSIG4 Stable Release" on myDIRSIG to download DIRSIG 4.7.5.18476. Hello DIRSIG5! We are also pleased to announce that the latest DIRSIG4+DIRSIG5 combo release is available.  To obtain a copy of this release, navigate to the  "Current DIRSIG5 Preview Release" on  myDIRSIG  to download DIRSIG 5.0.10.3405.  DIRSIG5 is mature and used almost exclusively by the student and staff researchers at RIT. However, b ecause DIRSIG5 is not at full feature parity with DIRSIG4 (but exceeds DIRSIG4's capabilities in other areas) DIRSIG5 is packaged wi...

The transition from DIRSIG 3 to DIRSIG 4 was a major shift towards a more modern code architecture and a more flexible simulation design. The goal was to address the development challenges faced at that time and to be ready for the new features and capabilities that would come. During the past few years, we have added new modalities (particularly LiDAR), new platform support (Windows), an entirely new GUI interface, native 3D radiative transfer code, extensive sensor and platform modeling, support for more complex scene radiometry, and many other features to support user needs. Every new piece of code has expanded, and in some cases, stressed, the underlying DIRSIG 4 framework and its original design. While this evolution has been successful functionally, we have made sacrifices to execution speed and our agility adapting to new challenges and projects well beyond the scope of what was imagined, or even possible, when that framework was constructed. DIRSIG 5 (D5) represents another maj...