Winds through the troposphere and lower stratosphere
The image below shows the results of observations over a day. Coloured ’wind barbs’ show the wind direction. They are plotted against height or altitude in kilometres and time. An upward wind barb indicates wind blowing from the north. One pointing to the right indicates a wind blowing from the east (as on a compass dial). The colour of the arrow indicates the wind speed as shown in the scale bar on the right hand side, ranging from dark blue for low velocity to yellow for high velocity. The number of barbs tell the wind speed using a convention adopted by meteorologists. Typically, winds are measured between 0.5 and 10 km to 15 km. The lack of a barb indicates that no data was obtained for that height and time. The base height of observations is defined by the parameters under which the radar is operating.
The image below is a map of the directions in which meteors trails have been detected. For each dot (detection) the distance from the centre gives the angle from the zenith (overhead). North is upwards and East is to the right. Most meteors are detected in the height range 80 km to 95 km. The lack of detections to the North-East and the South-West is due to the relative insensitivity of the meteor receiver antennas in those directions. The radar reflection maximises at 90 degrees to the meteor trail. The total number of detections during the period of observations is indicated at the top of the image.