For anybody interested in launching or tracking high altitude balloons, this conference is a good introduction and also a good perspective on citizen science in general.
The conference details are here:
https://ukhas.org.uk/general:ukhasconference2019
and tickets can be booked here:
https://www.imperialcollegeunion.org/shop/club-society-project-products/space-society–products/27226/uk-high-altitude-society-conference-ticket