The CBC will be upgrading its satellite transmission system tonight in Calgary and southern Alberta.

Service on CBC Radio One and CBC Radio Two will be affected starting at 9 p.m. MT.

The interruption in service is expected to last about 20 minutes. After that, programs in progress will be rejoined: Ideas on CBC Radio One and Tonic on CBC Radio Two.  

The livestream online will not be affected. Listen live here. 

Thank you for your patience.