On October 1st, I went to see the Cathay Pacific 747-400 retirement flight, and inadvertently discovered that there were now 2 ILS GP glide slope antennas on Runway 34L. Zooming in, it looks like this. The antenna on the left in the picture is slightly higher and slender; it is the one currently in use. The one on the right is slightly shorter and stouter; it is newly built, but it is not yet known when it will be officially put into operation. I checked the AIP, but couldn’t find any clues.

I guess the antenna is being replaced, but when exactly did the work start? I looked through the photos on hand, and the earliest one is from September 17th. At this point, there were already 2 antennas.

I didn’t go to Haneda in August because of the heat, so the most recent photo before September is this one taken on July 30th. You can see that there was still only one at the end of July. Therefore, it can be determined that the work started in August.

The location of the antenna can be found in the figure below. Located between Taxiway A and Runway 34L, between A2 and A1, right facing the JAL maintenance hangar on the west side.