Times within these files are given in YYMMDDHHMMSS format. A description of the equipment and procedures used to collect these data is given in Galbally et al., `Ozone, nitrogen oxides (NOx) and volatile organic compounds in near surface air at Cape Grim', in `Baseline Atmospheric Program (Australia) 1994-95', edited by R.J. Francey, A.L. Dick and N. Derek, p 81-88, Bureau of Meteorology and CSIRO Division of Atmospheric Research, Melbourne, Australia, 1996. Whilst the data have been edited to remove bad data caused by known instrument malfunctions, a detailed item-by-item examination of the data has not been performed. Further enquiries about these data may be addressed to either Ian Galbally (ieg@dar.csiro.au) or C.P. (Mick) Meyer (cpm@dar.csiro.au).