Release Notes

Download

The Space Weather & Atmospheric eNvironments Toolkit

A comprehensive software toolkit for modeling, analyzing, and visualizing space and atmospheric environments for spacecraft, missions, and research.

Windows 10/11 • Released September 2026

September 2026
New
- Mission Builder — advanced customization and mission generation tool for core phases of a mission (e.g., launch, orbit, reentry, basic trajectory) with a live 2D/3D preview.
- Environment Profile page — a full results view for your custom environment runs: radiation source breakdown, energy spectra, mission map, and more in one place.
- Real-Time monitoring — live space weather conditions (Kp index, solar flux, X-ray and proton flux) pulled directly from NOAA.
Improved
- Refreshed, cleaner interface throughout the app.
Fixed
- Corrected a unit-conversion bug affecting geomagnetic transmission calculations.
- Atmospheric density now correctly reports "not available" above the model's altitude limit instead of an invalid value.
- Settings are saved before popups open, so changes are no longer lost.
August 2026
SWAN (Space Weather and Atmospheric eNvironments) models space radiation and atmospheric conditions along a mission trajectory, right on your desktop.
Highlights
- Custom environment modeling — combine galactic cosmic ray, solar energetic particle, and trapped radiation models with atmospheric composition into one holistic environment profile for your mission.
- Trajectory generation — define a trajectory from scratch or load your own ephemeris file.
- World mapping — 2D and 3D global views of radiation and atmospheric fields.
- Secure by design — mission and environment data stored locally on your machine, with license-based activation for SWAN or free use with SWAN-Lite.

Download now. License later.

The SWAN application includes a Lite mode that is automatically used when no license is found.

No license key is required to download or use the Lite functionality. If you later obtain a license, you do not need to download a different version — simply activate your license in the same application.

Already have a license?

The same SWAN application unlocks the full toolkit when a valid license key is activated.

Looking for the full toolkit?

Request a SWAN license to unlock all the capabilities of the SWAN toolkit.

  
        SWAN-Lite
        SWAN
      
        Application
        SWAN
        
          SWAN
          Same application!
        
        License
        Not required
        Required
      
        Capabilities
        Limited access
        Full toolkit
      
        Cost
        
          Free
        
          $120/mo
          
        Updates
        ✓ Included
        ✓ Included
      
        Best for
        Exploring SWAN, hobbyists, & high-level awareness
        Space operations, research, & mission analysis