THE F-2 REGION OF THE IONOSPHERE AT WUCHANG DURING THE SOLAR ECLIPSE OF MAY 9, 1948
一九四八年五月九日日食与武昌上空F—2层所受之影响

From data obtained during the eclipse and on control days, the effective coefficient of recombination for F-2 layer is found to be 4×10-10 cm3/electron per sec. The magnitude of a is apparently a function of the height of the layer which becomes lower with increasing latitude. Solar eruptions may be associated with two of the discontinuities of the eclipse curve. The thickness of the F-2 layer became compressed and dropped as a whole during the eclipse, possibly due to air movement caused by lowering of temperature. The sporadic E layer was not influenced by the change of solar radiation, and must be due to other causes.