I got one of these missions today, here's what I learned:
Even though it says there's a 24-hour-ish time limit, the target will only be in place about the same time as a regular 'hunt pirate lord' mission, so scan the target ASAP so you don't miss the window.
You can use the maps linked to in this post (
https://forums.frontier.co.uk/showt...et-quot-Modified-Embedded-Firmware-quot/page5) to help figure out a path to the Comms Panel. Mine didn't look very accessible at all, so I found a nice sloped wall near where I wanted to go, drove at it fast, used the SRV boosters and managed to climb the sloped wall to get onto the roof.
Dismiss your ship if the settlement has medium or high security, that way as long as you have scanned the target before your SRV blows up (there's a high chance it will), you will just spawn back in your ship, which is safely in orbit.
You have to be within about 50m to scan the array, and you will almost certainly have to use your turret to aim up and keep the array (it rises higher when you get close) in view to scan it.
Then make a run for it. Even though the array is probably public, the area around it is probably a forbidden zone, resulting in the turrets, skimmers and defense ships wanting to blow you up. As long as they only blow up the SRV, that's about 1k to replace, so hardly worth mentioning, and you can get another one at most ports.