| タイトル | Radar depolarization signatures of rain in cumulus clouds measured with a dual-frequency air-borne radar |
| 著者（英） | Meneghini, Robert; Iguchi, Toshio; Kumagai, Hiroshi |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1992-01-01
1992 |
| 言語 | eng |
| 内容記述 | Experimental data are presented on dual-wavelength scattering characteristics of subtropical rain observed during the convection and precipitation/electrification (CaPE) experiment. Linear depolarization ratios (LDRs) are calculated at both X-band and Ka-band channels. In stratiform rain, the cross-polarized return signal is generally below the noise level except within the melting layer where the maximum LDR at both frequencies is typically between -12 and -10 dB. In convective rain the range profiles of the LDR in X-band and those in Ka-band do not coincide. The X-band LDR values in convective rain typically remain smaller than -25 dB at high altitudes and take somewhat larger values of -25 to -15 dB at low altitudes. The Ka-band LDR values, in contrast, typically increase with radar range, sometimes reaching a level of -3 dB just before the cross-polarized signal falls below the noise level. Such high values of LDR in Ka-band are most likely attributable to multiple scattering effects. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 93A48026 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/315591 |
