The code "CHA" is stenciled everywhere. Can someone decipher the anagram? Was this station called something else during the past?

Date: 2007-08-05
Owner: Jimmy Jose
Full size: 1280x960

Photo Properties
Summary  Details
Make SONY Model DSC-W7
Aperture Value f/3.5 Color Space sRGB
Exposure Program Program Flash No Flash
ISO 200 Metering Mode Multi-Segment
Shutter Speed Value 1/40 sec Date/Time 2007 Aug 05 17:07:05 +0100