You will find more details for decoding in this article:
This is an educational purpose audio stream. You can use this audio stream to experiment with narrow band satellite reception without physical ground station (SDR, LNA and antenna hardware) having fun and learning SDR technologies without experience (and investment) in RF Hardware.
Simply open in your browser to start streaming via OpenWebRX: sniffing.ddns.net:8073
For those who want to understand the RF HW setup deeper and might replicate the remote radio head server here is an short video: