What are they doing?

I saw them dragging this carpet looking thing over the taxiways at Eindhoven Airport in the Netherlands. I’ve done my share of flying, but it’s the first time I’ve seen this equipment. Does anyone know what it is used for?

I saw them dragging this carpet looking thing over the taxiways at Eindhoven Airport in the Netherlands. I’ve done my share of flying, but it’s the first time I’ve seen this equipment. Does anyone know what it is used for?