1. Chilbolton Site Instrument Availability Major Chilbolton Instrumentation Availability during CloudNet Major Chilbolton Instrumentation Availability during CloudNet Major Chilbolton Instrumentation Availability during CloudNet 200220032004 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

2. 94GHz Radar / IR Lidar Availability IR Ceilometer – data available continuously from 1/10/2001 94 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

3. 94GHz Radar / IR Lidar 10 April 2003

4. 94GHz Radar / IR Lidar 13 April 2003

5. 94GHz Radar Reflectivity/Doppler 14 April 2003

6. 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