Nimbus Gas Giant Atmospheric Profiles

Each time a Nimbus Gas Skimmer dives into a gas giant to scoop fuel, its sensors record temperature, pressure, wind and composition all the way down to the scoop altitude. Across more than 6,000 dives since 2185, those measurements have become the densest in-situ record of giant-planet atmospheres ever assembled.

The helium-3 abundance measurements are commercially valuable: they show where the scoop yield is highest. Halcyon publishes them anyway, because a shared, accurate map makes skimming safer for every two-pilot crew in the business.

Profiles are released under CC-BY-4.0 within 30 days of each dive. Atmospheric scientists use them to test circulation models, and refuelling partners use them to plan routes.

Contributors can help merge Nimbus profiles with remote sensing from orbiters such as the Corona monitor. In practical terms, users can download temperature and pressure profiles, helium-3 abundance measurements and wind shear data free of charge under CC-BY-4.0, with source and documentation at https://git.halcyon.example/nimbus-profiles. Halcyon's open data programme treats this resource as shared infrastructure, much like a lighthouse: it costs little to run once built, and it makes the whole solar system safer and cheaper to work in. Issue reports, documentation fixes and translations are all valued contributions.