VOACAP is an improved and corrected version of IONCAP, retaining all of the theory as put forth by John Lloyd, George Haydon, Donald Lucas and Larry Teters in the 1975-1985 time-frame with modifications which were suggested/approved by George Lane, Donald Lucas, George Haydon and A. D. Spaulding (a world authority on HF radio noise predictions).
VOACAP (Voice of America Coverage Analysis Program) – free professional HF propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA).
- VOACAP Online – an easy-to-use Google Maps basedtool for making professional HF predictions
- Current International Smoothed Sunspot Numbers, Ri, to be used in VOACAP, from NOAA/NGDC (updated until 2018)
- Current Space Weather: Solar Wind, Magnetogram, X-Rays, Protons
- QTH Locator – find coordinates and Maidenhead locators on Google Maps
Sunrise and sunset times around the world
- Today’s Sunrise and Sunset Times by DXCC country
- Today’s Ionospheric Grayline by DXCC country