Statically mounted polarsondes at Macquarie Island

One is located on the anemometer mast on the isthmus, about 9.5 m above the ground, and the other on the transmitter mast on Wireless Hill, at a height of about 2.5 m. The instruments emit polarised light horizontally into the atmosphere in a SSE direction.

Each has two channels, with different polarisations and/or different wavelengths, and each channel has two photodetectors, one with the analyser polariser oriented parallel to the emitted polarisation, and the other with analyser oriented perpendicular. Anemometer mast: To March 2017; Channel 1, horizontally polarised light emitted, 470 nm Channel 2, emitted light polarised 45 degrees to horizontal, 470 nm From March 2017; Channel 1, horizontally polarised light emitted, 470 nm Channel 2, horizontally polarised light emitted, 650 nm Wireless Hill mast: Channel 1, horizontally polarised light emitted, 470 nm Channel 2, emitted light polarised 45 degrees to horizontal, 470 nm The data are in ASCII text format, recorded once per second and written to hourly log files.