Chilbolton Site Instrument Availability Major Chilbolton Instrumentation Availability during CloudNet Major Chilbolton Instrumentation Availability during CloudNet Major Chilbolton Instrumentation Availability during CloudNet Oct Dec Jan Mar Apr Jun Jul Sep Oct Dec Jan Mar Apr Jun Jul Sep Oct Dec Jan Mar Apr Jun Jul Sep Oct Dec 1275 MHz Radar 3 GHz Radar 35 GHz Radar 94 GHz Radar IR Ceilometer UV Raman Lidar 22/28 GHz Radiom’ 38 GHz Radiometer

94GHz Radar / IR Lidar Availability IR Ceilometer – data available continuously from 1/10/ GHz radar – data available continuously from 1/10/2001 with gradual loss of sensitivity to 15/3/2002 Then EIKA total failure Recommenced observations on 10 April at ~14.00 (but overheated on 16 April – switched off over Easter) Now operational again

94GHz Radar / IR Lidar 10 April 2003

94GHz Radar / IR Lidar 13 April 2003

94GHz Radar Reflectivity/Doppler 14 April 2003

Summary 94 GHz radar operational again – 10 April 2003 (continuous) 35 GHz radar – begins trials at Chilbolton May 2003 IR Ceilometer - operational continuously UV Lidar - intermittent (safety/cost considerations) Radiometers - continuous