In view of medium-resolution imaging mode of the Doppler Beam Sharpening technique in the signal processing of airborne radar,an effective sliding window FFT DBS imaging algorithm is proposed on basis of studying its operational principle.

Beylkin,Wu and Toksz,Seggern,Vermmer,Chen and Schuster carried out many studies in the factors affecting the seismic imaging resolution by means of qualita.

Improving imaging resolution can optimize imaging performance.

The imaging resolution of UWB-TWI is analyzed and derived to establish the correspondences between the imaging resolution and the impulse time resolution as well as the influence of radar arrangements on the imaging resolution.

The Application Prospect of Moderate-resolution Imaging Spectroradiometer(MODIS)Data in Earth Science;

For its high spectral and time resolution, MODIS data was more suitable for the inversion of snow depth compared to NOAA and other remotely sensed data.

The objective of this paper is to determine the suitable MODIS spectral indices for monitoring growth status change during crop growing season.

Based on 8-year(March 2000-February 2008) MODIS satellite data,the spatial and temporal distributions of aerosol optical depth(AOD) and fraction of fine-mode aerosols(FMF) were examined over the Beijing-Tianjin-Hebei plain area.

For the visible and infrared radiometer (VIRR) infrared 4-channel and medium resolution spectral imager(MERSI) infrared 5-channel,the line-by-line radiative transfer model (LBLRTM),in which the atmospheric profiles adopt global 52 atmospheric profiles generated by ECMWF,was performed to calculate the spectral radiance emitted from the earth-atmosphere between 8μm and 14μm.