Complex sentence: Personal weather stations may be operated solely for the enjoyment and education of the owner, but many personal weather station operators also share their data with others, either by manually compiling data and distributing it, or through use of the internet or amateur radio.
Split into simpler sentences: Personal weather stations may be operated solely for the enjoyment and education of the owner, however some owners share their results with others. They do this by either by manually compiling data and distributing it, distributing data over the internet internet, or sharing data via amateur radio.