ESTcube-1 GNU Radio receiver:
Follow the link and download the gr-ec source and compile it as mentioned on the page. After that, create the following GNU radio blocks to decode the data from ESTCube-1. This setup can also be used for other AX25 signals maybe this will also work for BeeSAT-2 4800 band GMSK.
Is there somebody familiar with GNU Radio to get this up and running? I’ll give it a try with my Ubuntu 12.03 TLS install.