| This paper introduces the measurements principle of a space-borne real-aperture radar spectrometer as well as the error analysis model. Then analysis of the wavelength resolution and directional resolution is presented, based on the SWIM instrument, which is proposed by Hauser, et al [1]. To reduce the fluctuation of retrieved spectra, it is proposed to average 10 adjacent independent samples in time domain and eight in wave-number domain, respectively, during the data processing. And for achieving a directional resolution better than 20, the largest number of integrated sub-period is 3, 7 and 10 for the instrument operated in 3 different modes, respectively. Finally, two methods, namely analytical process and simulation process, are adopted to analyze the energy error of retrieved wave spectra by SWIM operated at Mode Two. Results of the two methods are in agreement, which show that the energy error is less than 20% for certain wave conditions. |
