They might be using cameras on my home or family. They might be testing some kind of radar or other tech that has a health impact. They might be a competitor assessing my crops. More broadly their very presence is a trespass on my right to live and be left alone on my own property.

Radar at legal power levels does not have a health impact.

Even so a property owner should have a right to decide whether it is used on his property

I totally agree. Infact the FAA owes me money if they allowed drones below 400ft. This is a taking of my property. I own up to 400 feet. If these drones want to follow the roads that is fine with me. Don't tread on my private property.

The article is just a grid pattern nearby, but I was imagining something like a drone hovering over your place indefinitely. I'm uncomfortable with the use of high precision cameras, especially infrared or heat cameras pointed at my house. It's technically legal， sure, but knowing when I leave and return, where I am in the house, etc. I could just imagine it feeling like an invasion of privacy. Also, imagine a stalker using one of these.