Just in case there is an effect on the data, here is my attempt to reconstruct tours of the tower and radiometer stands:
6/19 1530-1630 Program managers tour.
6/23 1130-1400 Ann Marie and sons tour.
6/27 1300-1500 Karsten and Lindsey tour.
These events could have spikes on the 2m chemistry inlet, as people were standing near the tower base. There also could be higher Rlw.out or Rlw.in.