Presumably it is https://monarch.engin.umich.edu/ https://monarch.engin.umich.edu/ which isn't really a geolocation device, it's a environmental logger that can

Presumably it is https://monarch.engin.umich.edu/ https://monarch.engin.umich.edu/ which isn't really a geolocation device, it's a environmental logger that can (apparently) be used to infer a track.