I think the most amazing part about this is the video at the bottom of the article: Miikshi: Cosmic Rays (4K). The caption calls it a “charming fictional animated video to explain their muon-based systems”. But I cannot emphasize enough how much this undersells it.
It’s like a weird charming mashup between Thunderbirds, Muppets and a real muon science team. You really have to just watch it.
If you had trouble understanding what the muon positioning system from the article might be used for or how it works there is a short explanation from Professor Tanaka at the end of the video.
In the hamburger menu on the left you should find an “Add account” button. IIRC it says the word “Anonymous” and you have to tap it to show the add account button.
Some things in Jerboa are a bit confusing for now. Once you get to know where things are it’s pretty good though.