Imho simply depends on aerospace condition ie. zonal climate and weather
EM waves can be affected by atmospheric conditions, such as rain, fog, and snow. These conditions can cause radio waves to scatter or absorb, which can lead to communication disruption
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Satellites use various wavelengths of electromagnetic radiation to perform their jobs, depending on the specific purpose of the satellite. Here are some examples of satellite applications and the corresponding wavelength ranges they typically operate in:
Communications satellites: These satellites use microwave frequencies, typically in the range of 1 to 50 GHz. This allows them to transmit and receive signals over long distances and through the Earth's atmosphere.
Earth observation satellites: These satellites use a range of wavelengths, from visible light to microwave and radio frequencies. Visible and near-infrared wavelengths are used for imaging the Earth's surface, while microwave and radio frequencies can penetrate clouds and vegetation to provide information on things like soil moisture and ocean surface temperature.
Weather satellites: These satellites use a range of wavelengths to observe different features of the atmosphere, including visible and infrared for cloud imaging, microwave for temperature and moisture profiling, and radio frequencies for communication with ground stations and other satellites.
Navigation satellites: These satellites use radio waves in the microwave frequency range, typically around 1.2 to 1.6 GHz, to provide precise location information to users on the ground.
Proportion of wavelengths used by satellites depends on the specific mission and application of the satellite
should be in electronic sites; EEVBlog, allaboutcircuit, etc instead