Little LEO
Little LEO was coined as a term for generally smaller satellites in low earth orbit (LEO) that communicate over frequency bands below 1000 megahertz. For such systems, frequencies of 137 to 150 MHz are allocated worldwide in the ultra-short wave range. The use of these areas by commercial satellite operators was perceived by radio amateurs as a threat to the further public usability of the 2-meter amateur tape and was combated.
Only Orbcomm has licensed frequencies for satellite broadcast services in this area. Otherwise, amateur radio satellites such as the Saudi OSCAR 50 belong to the Little LEO systems.
In contrast to Little LEO systems, the usually larger Big LEO systems communicate on frequencies above 1000 megahertz, e.g. B. as Iridium or Globalstar , where more bandwidth is available.