ALOS-2 mission and development status
ALOS-2 mission and development status
复制标题
DOI：
10.1109/igarss.2013.6723302
复制
发表时间：
2013-07
期刊：
影响因子：
--
通讯作者：
Y. Kankaku;S. Suzuki;Y. Osawa
中科院分区：
文献类型：
--
作者：
Y. Kankaku;S. Suzuki;Y. Osawa
日本宇宙航空研究开发机构正在开发高级陆地观测卫星-2号（ALOS-2），该卫星携带称为PALSAR-2的最新L波段合成孔径雷达。ALOS-2使命是ALOS "Daichi"使命的后续任务，PALSAR-2是ALOS上PALSAR的后继任务。PALSAR通过其干涉测量应用（干涉合成孔径雷达）为国内和国际灾害管理活动作出了贡献。与PALSAR相比，PALSAR-2需要更高的空间分辨率、更好的NESZ（噪声等效西格玛零）和更好的S/A（信号模糊比）。为了满足这些要求，日本宇宙航空研究开发机构进行了若干改进，如PALSAR-2的最大带宽观测、有源相控阵天线的聚光灯模式、高功率效率装置、线性调频调制技术和双接收天线系统。此外，非常精确的轨道控制和较短的重复通过轨道（14天）将使干涉测量具有更高的一致性。
JAXA is developing the Advanced Land Observing Satellite-2 (ALOS-2) carrying the state of the art L-band SAR named PALSAR-2. ALOS-2 mission is the follow-on of ALOS “Daichi” mission and PALSAR-2 succeeds to PALSAR onboard ALOS. PALSAR contributed to domestic and international disaster management activities by its interferometric application (InSAR). Compared to the PALSAR, higher spatial resolution, better NESZ (Noise Equivalent Sigma Zero) and better S/A (Signal to Ambiguity ratio) are required for PALSAR-2. In order to meet these requirements, JAXA introduced several improvements such as maximum bandwidth observation for PALSAR-2, spotlight mode with Active Phased Array Antenna, high power efficiency device, chirp modulation technique and dual receiving antenna system. In addition, very accurate orbit control and short repeat-pass orbit (14 days) will give higher coherence of interferometry.