Not certain what you mean by real data. What you get with the Aruba redirected mirroring is the packets to/from the AP. You currently have it filtered by STA address so if you want to see all the beacons and probes you will have to filter by bssid. If it is WEP or WPA/WPA 2 encrypted you can add the key/passphrase to Wireshark to decrypt. If you put a display filter WLAN in wireshark you can limit your view to only wireless packets from the Aruba redirection. The wireless packets will show as Wireshark Protocol column as 802.11 and other data if unencrypted will show as the type of packet it is like ICMP for a Ping.
At layer 4 (IP ) the packet would have the addresses of the AP and your wireshark client because this a redirect for port mirroring from the AP. The Aruba section of the packet (likely at the bottom) will show the encapsulated 802.11 L2 SA & DA information.
In the example attached the source address is a IPHONE and the destination address is an Aruba 105.