He circled over the aerodrome.

机场上空盘旋。

There is no influence of aerodrome on the calibration of airplane radio compass error with aerophotograph, but it causes some effects on measurement accuracy.

空中照相法校正飞机无线电罗差不存场地影响,但实施过程中,又引入了一些其它影响测量精度的因素。