Data availability and file formatThese instruments make observations in two interlaced modes; the low mode covers the approximate altitude range 0.1 - 2.0 km at 0.1 km intervals, and the high mode covers the approximate altitude range 0.2 - 8.0 km at 0.2 km intervals. The useful altitude coverage varies with atmospheric conditions and only extends significantly above 2 km when precipitation is present. Although the cycle time for observations is of the order of a few minutes, the data used by the Met Office represent "consensus averages" over 30 minutes.The data held at the BADC, are stored in a simple ASCII format (plain text and "human" readable). A detailed description of the file structure is available.