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利用1956—1994年期间分别在长春和乌鲁木齐两观测站上观测的f0F2和f0F1月中值，定量分析了两站上观测的经度效应，讨论了产生两站上经度效应的可能物理机制，并与国际参考电离层模式的结果进行了比较．
Using the mid-values of f0F2 and f0F1 observed from two observation stations in Changchun and Urumqi during 1956-1994 respectively, the longitude effect observed at two stations was quantitatively analyzed. The possible physical mechanism for generating the longitude effect on both stations was discussed. The results of the international reference ionospheric model are compared.