This method needs only one calibrationsource. Its calibration effect is good, and the calibration performance is stable.
该方法只要一个校准源，校正效果好，性能稳定，所需运算量也不大。
2
Under the constraint of DOA angles and sensor gains in the signal subspace, the estimation of sensor gain can be obtained without any calibrationsource.
运用信号子空间对信号DOA和通道增益的约束关系，在无校准源时，可以得到通道增益的估计。
3
The inverse radiation noise of a microwave radiometer for remote sensing is analysed in this paper. A model is used to determine the bright temperature of an aperture-calibrationsource.