Over 80 Israeli high school students have built a CubeSat called Duchifat-2 as part of the QB50 Thermosphere research program 

Duchifat-2 is one of 28 QB50 Cubesats from 23 countries launched on 18th April 2017 to the International Space Station (ISS) from where they shall be placed into orbit in six weeks time.

Duchifat-2 and its companion Cubesats will measure the plasma density of the Thermosphere between 85 km and 300 km altitude above the Earth’s surface. Israeli students will study the data from the Cubesats at the Herzliya Science Centre, where signals from the orbiting satellites will be received.

Full story - https://spacewatchme.com/2017/04/israeli-high-school-students-build-duchifat-2-cubesat/

All the CubeSats in the QB50 project will mainly operate on frequencies in the 2 m and 70 cm amateur bands. To avoid interference with terrestrial amateur radio activity the frequency was coordinated by the IARU Satellite Adviser and advisory panel.

QB50 project - https://www.qb50.eu/

JE9PEL QB50 CubeSat Frequency Spreadsheet - https://amsat-uk.org/2015/11/08/je9pel-qb50-cubesat-spreadsheet/