Maghrabi, A.Clay, R.Riordan, D.2010-07-262010-07-262009Transactions of the Royal Society of South Australia, 2009; 133(1):164-1710372-14260085-5812http://hdl.handle.net/2440/59533We have previously described the design and operation of a simple infra-red cloud detector intended for monitoring clouds at remote astrophysical observatories. If such a detector is to automatically scan and monitor the whole sky over long periods of time, it is necessary to have a method for reliably determining the distinction between a cloud signal and the clear sky over a range of meteorological conditions and zenith angles. We have accumulated data over a number of years of monitoring to enable a cloud discrimination method to be developed and good cloud discrimination to be reliably achieved. This paper describes the technique.enCopyright status unknownAtmospheric effectsinfra-red instrumentationJournal article002009628310.1080/03721426.2009.108871150002078571000102-s2.0-7995775923735177Clay, R. [0000-0002-9040-9648]