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Descrizione
No guesswork. No stale forecasts. Just the numbers, rendered in a retro CRT phosphor display that would look at home in a Cold War listening post.
BAND CONDITIONS
See at a glance which HF bands are open, marginal, closed, or blacked out. Conditions are calculated from real-time solar flux, geomagnetic activity, and X-ray flux data — not generic regional forecasts. Each band shows your local status plus path-specific conditions to every DX target you configure.
MUF CALCULATION
The Maximum Usable Frequency for a 3000km reference path from your QTH, derived from Solar Flux Index, solar zenith angle, and depressed by geomagnetic activity. Individual MUFs are calculated for each great-circle path to your DX targets, because the ionosphere doesn't care about averages.
SOLAR INDICES
All the numbers that matter, updated in real time:
Solar Flux Index (SFI) with 30-day trend chart
Planetary Kp Index with 24-hour bar chart
Estimated Sunspot Number (SSN)
GOES X-ray flux class and latest flare detection
Solar wind IMF Bz component
NOAA R/S/G scales (Radio Blackout, Solar Radiation, Geomagnetic Storm)
Running A-index and solar wind Bt
Each index includes a plain-language assessment: is the F2 layer well ionised? Is the geomagnetic field quiet or disturbed? Is the solar wind coupling or shielded?
3D GREYLINE GLOBE
A SceneKit globe shows the solar terminator — the boundary between day and night — in real time. The greyline (twilight zone along the terminator) is where lower-band DX propagation is enhanced, and it's rendered as an amber band you can see at a glance.
The globe displays coastlines, your QTH position, DX target locations, and great-circle paths coloured by band condition. Drag to rotate. Double-tap to recentre on your station. Hit play to watch the Earth spin.
SPACE WEATHER ALERTS
NOAA SWPC alerts and warnings filtered for HF relevance. Flare events, geomagnetic storms, radio blackouts — the alerts that actually affect your ability to make contacts, with full detail on tap.
DX TARGETS
Configure up to five target regions. PhosphorHz calculates path-specific propagation for each one, using great-circle geometry and the MUF at the midpoint of each path. What's open to Japan might be closed to South America — and now you can see both at once.
FEATURES
Real-time data from NOAA SWPC (public domain, no API key required)
Band conditions for 160m through 6m
Path-specific propagation to multiple DX targets
3D interactive greyline globe with terminator visualisation
Sunrise/sunset times and countdown to next solar event
Day/night/greyline status at your QTH
Kp index 24-hour bar chart
SFI 30-day trend line
Full space weather alert log with 30-day history
Maidenhead grid locator display
Automatic location detection or manual grid entry
Green phosphor and amber phosphor CRT themes
CRT scanline overlay effect
Designed for iPhone, portrait orientation
No ads. No tracking. No subscription.
Part of the Phosphor suite: PhosphorWX (aviation weather), PhosphorRad (radiation monitoring), PhosphorSol (space weather), and PhosphorOrbit (satellite tracking).
73 de PhosphorHz.
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- Stuart Woolley
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Informazioni aggiuntive
- Versione: 1.0
- Categoria:
iOS App›Riferimento - Sistemi operativi:
iPad,iPhone,iOS 26.2 e versioni successive - Dimensioni:
3 Mb - Lingue supportate:
English - Classificazione contenuti:
4+ - App Store Voto:
0 - Aggiornata:
- Data di uscita:
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