Examination of the hourly values of the 10-90 per cent fading range of selected 915 Mc tropospheric scatter records of a 400-mile path have shown unusual behavior which correlates well with wind shear through the scatter volume. Although the meteorological data were of a gross nature and were collected at a point at least 70 miles from the common volume, correlation coefficients of 0.76 to 0.8 were obtained. The data indicate that the fading range (10-90 per cent in this case) increases by 1.4 db per meter/sec/km increase in average wind shear through the scatter volume.
