MSF 60 kHz off the air during the day for annual maintenance: 4 – 20 July 2016 See: http://www.npl.co.uk/science-technology/time-frequency/products-and-services/time/msf-outages Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv