遥感产品真实性检验是评价遥感产品质量、可靠性和适用性的唯一手段,是提高遥感产品精度、改善遥感产品质量的主要依据,更是推动遥感产品应用范围和应用水平的重要保障。主要介绍国家高技术研究发展计划地球观测与导航技术领域“星机地综合定量遥感系统与应用示范(一期)”项目在“遥感产品真实性检验关键技术及其试验验证”方面取得的主要进展:研制了一系列国家标准,包括陆地定量遥感产品真实性检验通用方法,遥感产品真实性检验地面观测场的选场和布设规范,以及24个遥感产品真实性检验的单项国家标准;研建了遥感产品真实性检验的完整技术流程体系,发展和完善了真实性检验过程中的空间优化采样—尺度上推—检验策略的关键技术方法;通过星机地同步试验获取多尺度配套观测数据集,系统实证了遥感产品真实性检验标准与技术体系;构建了遥感产品真实性检验网,开展核心观测场的多模式联网观测实践,初步形成全国真实性检验网的原型体系和运行机制,为我国遥感产品真实性检验的业务化运行奠定了坚实的基础。
The validation is an important guarantee of quality, reliability and applicability of Remote Sensing Products (RSPs) , and is also the foundation to improve the RSPs accuracy, extend the application domain and strength the application ability. This paper introduced the progresses and lessons learned from a project titled by ' key technology of remote sensing products validation and its experimental evaluation' supported by Ministry of Sci- ence and Technology of China. The progresses included: ①Formulating a series of national standards composed of general methods for the validation of terrestrial quantative RSPs, field-site selection and instrumentation for land surface RSPs, and other 24 individual standards of remote sensing variables ; ②Building integral technique process system of RSPs validation ;③Developing some key methods from optimized spatial sampling, upscaling to validation strategy; ④Obtaining the multi-scale satellite-airborne-ground synchronized observation and evaluating systemati- cally the validation standard and techniques; ⑤Setting up national validation network for RSPs, exploring muhi- mode allied observation experiment and forming the prototype and operation mechanism for the validation network.