In these 2 photos of a Beech Super King Air 200 the photographer explains that the aircraft is ............
"Used for checking and calibrating the ILS system and airport lighting."
Photo © Daniel Alaerts - AirTeamImages
Photo © Derek Pedley - AirTeamImages
In this photo below, the photographer explains that the man under the King Air is cleaning the laser which can be seen hanging down from the belly behind the nosegear doors.
Photo © Dimitris - AirTeamImages
My questions are:
How is the laser on the King Air used to check and calibrate the ILS system for a runway or it's lighting system? (I'm assuming it's the approach lighting & rwy threshold & touchdown zone lighting that's being checked).
When I think of a laser, I think of a laser beam that's aimed at something.
In the case of an ILS system being calibrated, what would the laser beam be pointed at? Is there a ground crew involved in the test that has equipment set up in the middle of the runway's touchdown zone that the aircraft's laser is aimed at while on the proper glideslope angle ....... perhaps?
I simply curious about this.