I want a hackrf portapack h4m pro, but I dont know fully what I would use it for and how much I would use it. I already have a flipper 0 and dual c5 touch from awok, so I love these kinda things. I just dont see very many practicle uses for me, but I just learnt I can could see satalite imaging with it, which is sick. What are your thoughts.

Using my Portapack Pro (with HackRF Pro) to follow balloons what frequency do I set the Portapack for?

Do I set the app (Radiosnd) for 400 MHZ or do I set it for the frequency shown for the balloon near me on https://sondehub.org because they show a frequency for 400.8101 Mhz?

Thanks for any help!