In Horizons 3.8 when you approach a search zone it moves around until a fix on the location happens. This means it can take a few minutes to find the structure and datalink to scan. It adds to the mystery the first few times, then becomes a waste of time. In Horizons 4.0 and Odyssey you get a fixed position artificial structure to navigate direct to. While you can get the SRV out, small and medium ship's (except Mamba) can scan the datalink with the ships datalink scanner. Large ships are in danger of catching on buildings ( except the sleek Clipper), and the two big nose ships, Anaconda and Corvette cannot scan ground datalinks at all. The cockpit is set too far back. You might get skimmers shooting at you, so 200 to 300MJ shields is advisable. You will usually get fines and bounties doing this, so if you take a bunch of these in one outing, plan on visiting an Interstellar Factors on your way back.
It's a decent way for get Federation reputation and encoded materials at the same time.
Not sure it's worth it in Horizons 3.8 due to losing time searching for the ground structure.