There are photos and other info. showing them in use at the Aeroquest International website; check the drop-down menus or click on the following links: AeroTEM, Impulse & Resources. This is only one of several companies in the business; others do the same thing.
Links appear in the text on other pages.
By the way, Aeroquest trades on the TSX Venture exchange under the ticker symbol - AQL.
The photos serve them well. I have seen them in action, although it was from a distance. I couldn't get close enough to have a close-up and hands on look at the equipment after the helicopter landed. The landing pad is at a small airport strip about 2 miles from where I live, however, I might get another chance this spring or summer.
I placed the same information at another hub at Agoracom.