A rebuild of PhosphorHz inside and out, and the first version for iPad.

Band forecasts now come from the real ionosphere. PhosphorHz reads NOAA's GloTEC, a global map of the ionosphere built every ten minutes from GPS and satellite measurements, and works out the usable frequency of every path from it. Long paths are worked out hop by hop, so a distant contact is judged by its weakest reflection.

PhosphorHz now runs natively on iPad as well as iPhone, with larger type and a layout opened out for the bigger screen.

The interface has been redrawn around a standard tab bar, BANDS, INDICES, ALERTS, MAP and SETUP, with help for every page from a single button. BANDS gains a DX PATHS table giving the bearing, distance and usable frequency for each target, and whether the middle of each path lies in daylight, on the greyline or in darkness. Up to five DX targets now sit in fixed slots, added from a list of regions or your own coordinates. The Kp and solar flux charts are taller, with proper time scales, and the Kp chart keeps the same warning colours in both green and amber.

Under the hood, sunrise, sunset, the greyline and the day and night terminator now come from the same astronomy engine as our other sky apps, checked against the US Naval Observatory and NASA JPL. PhosphorHz opens straight onto the last data it received while fresh data loads, any data page can be pulled down to refresh, and each NOAA feed is fetched as often as it actually changes.

And a new app icon.

Fixed failed endpoints for source data, reworked data processing for new data formats.
Full functionality restored.