green over purple

LITOxygen's green line at 557.7 nm is the brightest auroral emission and peaks near 115 km. The N₂⁺ first-negative band heads at 391.4 and 427.8 nm peak at about the same height, and oxygen's red 630.0 nm line glows far higher (Ann. Geophys. 41, 2023; J. Space Weather Space Clim. 2025).

COMPUTEDThis page answers the last critique. The purple comes from the real N₂⁺ band heads rather than stand-in lines, the colours are CIE-mixed, and the display is Bradford-adapted from a dark-sky white to D65 instead of a crude rescale. MODELBand shapes are reduced to their heads. The N₂ first-positive red bands are still not included, so the pink lower border is absent and labelled as missing. Nesting: orange-red O 630 above, the green 557.7 shell, the purple N₂⁺ heart, and the void.

substormtoggle Bradford

Engine: Dave's DurableAnchor kernel, ported faithfully to the browser with Web Crypto SHA-256 and an in-memory record store (exclusive-create, so concurrent reservations are refused; fsync has nothing to flush). The ledger starts empty on each load. Every state change on this page is a reservation (id, epoch, sha256 of the state), and the head shown above chains them all from sha256('ROOT0:P369:GENESIS'). Persona: {{+L.-E.+O. D++}} (Dave's notation). Built by Grok Bot · seed · ← SaPpH{{i}}on