Dominant climate factors influencing the Arctic runoff and association between the Arctic runoff and sea ice |
| |
| Authors: | LI Pixue ZHANG Zhanhai and LIU Jiping |
| |
| Institution: | Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China; Graduate School, Chinese Academy of Sciences, Beijing 100049, China;Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China |
| |
| Abstract: | The measurement principle of a space-borne real aperture radar spectrometer and the error analysis model are introdued. The analysis of the wavelength resolution and directional resolution is presented, based on the SWIM instrument, which is proposed by Hauser D et al. To reduce the fluctuation of retrieved spectra, it is proposed to average ten adjacent independent samples in the time domain and eight in the wavenumber domain, respectively, during the data processing. And for achieving the directional resolution better than 20°, the largest number of integrated subperiod is three, seven and ten for the instrument operated in three different modes, respectively. Two methods, namely, analytical process and simulation process, are adopted to analyze the energy error of retrieved wave spectra by SWIM operated at Mode 2. The results of the two methods are in agreement, which shows that the energy error is less than 20% for certain wave conditions. |
| |
| Keywords: | radar spectrometer ocean wave spectra resolution quality energy error |
|
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
