[IGSSTATION-7444] NOT1 antenna cleaning

[GeoDAF]

Author: Giuseppe Colucci

Please note that on DOY 2018/302 the NOT1 (Noto, Italy) Leica AR20 
antenna has been thoroughly cleaned. Very important: before the cleaning 
there was a stagnation of water in the rings due to the presence of dirt 
that obstructed the drainage holes. When doing the cleaning, the antenna 
has not been disassembled.

Best regards,
Giuseppe Colucci