| タイトル | Noise Diode Stability Measurements Using a 4.3 GHz Laboratory Radiometer |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970027890 |
| 著者（英） | Lawrence, R. W.; Scherner, M. J. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1997-05-01 |
| 言語 | eng |
| 内容記述 | The need for passive microwave radiometry using aperture synthesis and phased arrays for large apertures requiring more stability has generated several studies. The in-flight calibration and, therefore, the stability of such systems is an important design consideration. A 4.3 GHz laboratory radiometry operating in a balanced Dicke mode has been developed for making precise brightness (noise) temperature measurements. The stability of the noise diode source used in the noise-injection loop is of interest. A statistical Allan variance method to characterize the stability of the radiometer and the noise diode is presented in this paper. Noise measurements which demonstrate this approach are also included. |
| NASA分類 | Electronics and Electrical Engineering |
| レポートNO | 97N26775
NASA-TM-112865
NAS 1.15:112865 |
| 権利 | No Copyright |
