期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 8
页码：160-163
出版社：Copernicus Publications
摘要：The EarthCARE project is the joint mission between Europe and Japan, in order to measure Earth radiation budget. There are four sensors on the satellite, which are Cloud Profiling Radar (CPR), High resolution spectral Lidar (ATLID; Atmospheric Lidar), Multi- Spectral Imager (MSI) and Broad Band Radiometer (BBR). The CP R is developed under the cooperation between National Institute of Information and Communications Technology (NICT) in Japan and Japanese Aerospace Exploration Agency (JAXA). CPR uses W-band frequency and 2.5m diameter of large antenna dish in order to obtain -35dBZ in sensitivity. As the result of large antenna, the beam footprint is very small and to give up antenna scanning. It is recognized the difficulty of external calibration using active radar calibrator (ARC). One solution of external calibration is that ARC puts on exact location of sub-satellite track. Precise sub-satellite track prediction is necessary. Another solution is using scattering from natural distributed target, such as sea surface. In this paper, we focus second solution. The CPR are requested satellite operation for roll angle maneuver in order to obtain the reflect signal from sea surface at various incidence angles. The wind speed is estimated by itself because no instrument nor simultaneous observation for wind speed for EarthCARE. The calibration accuracy analysis is performed using satellite wind speed data, such as AMSR-E radiometer. We had prospect to obtain enough accuracy by external calibration using sea surface. The feasibility of this calibration method is discussed
