Fig. 3
From: Mesospheric radar wind comparisons at high and middle southern latitudes
Representative examples of scatter plots of hourly averaged zonal (left) and meridional (right) winds for a height of 86 km for 2006. The red line is the slope to the linear fit when performing the regression of the 55 MHz data on the 33.2 MHz data. In this case, it is assumed that the 33.2 MHz velocity data set contains no errors and that all errors can be attributed to the 55 MHz data set. The blue line is the result when assuming that the 33.2 MHz data contain all of the error. These lines form a bounding region in which the true slope of the line lays. The green line is the slope of the fit obtained using a total least squares regression. In this case, the meridional green line slope differs from 1.0 by ∼ 0.7%, whereas the zonal differs by ∼ 6%