A highly elliptical orbit (HEO) is an elliptic orbit with a low-altitude (often under 1,000 kilometres (540 nmi)) perigee and a high-altitude (often over 35,786 kilometres (19,323 nmi)) apogee. The 'highly elliptical' term refers to the shape of the ellipse, and to the eccentricity of the orbit, not to the high apogee altitude.
Jul 25
The 2015 International Space Colloquium – the 30th held by AMSAT-UK, had taking place on July 24, 25 and 26, 2015 at the Holiday Inn, Guildford, United Kingdom. This video report includes important announcements about developments in the amateur radio satellite community. It is proof that AMSAT groups working borderless to develop new radio amateur satellite …