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Preliminary assessment of several parameters to measure and compare usefulness of the CEOS reference pseudo-invariant calibration sites

机译：初步评估几个参数，以测量和比较CEOS参考伪恒定校准位点的有用性

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摘要

Test sites are central to any future quality assurance and quality control (QA/QC) strategy. The Committee on Earth Observation Satellites (CEOS) Working Group for Calibration and Validation (WGCV) Infrared Visible Optical Sensors (IVOS) worked with collaborators around the world to establish a core set of CEOS-endorsed, globally distributed, reference standard test sites (both instrumented and pseudo-invariant) for the post-launch calibration of space-based optical imaging sensors. The pseudo-invariant calibration sites (PICS) have high reflectance and are usually made up of sand dunes with low aerosol loading and practically no vegetation. The goal of this paper is to provide preliminary assessment of "several parameters" than can be used on an operational basis to compare and measure usefulness of reference sites all over the world. The data from Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and the Earth Observing-1 (EO-1) Hyperion sensors over the CEOS PICS were used to perform a preliminary assessment of several parameters, such as usable area, data availability, top-of-atmosphere (TOA) reflectance, at-sensor brightness temperature, spatial uniformity, temporal stability, spectral stability, and typical spectrum observed over the sites.
机译：测试地点对于任何未来的质量保证和质量控制（QA / QC）策略都是至关重要的。地球观测卫星委员会（CEOS）校准和验证（WGCV）红外可见光传感器（IVOS）工作组与世界各地的合作者合作，建立了由CEOS认可的，在全球范围内分布的参考标准测试站点的核心集合（两者仪器和伪不变式）用于天基光学成像传感器的发射后校准。准不变校准点（PICS）具有高反射率，通常由沙丘组成，沙丘的气溶胶含量低，几乎没有植被。本文的目的是提供“几个参数”的初步评估，而不是可以在运营上用于比较和衡量全世界参考站点的实用性。来自CEOS PICS的Landsat 7（L7）Enhanced Thematic Mapper Plus（ETM +）和Earth Observing-1（EO-1）Hyperion传感器的数据用于对几个参数进行初步评估，例如可用面积，数据可用性，大气顶部（TOA）反射率，传感器处的亮度温度，空间均匀性，时间稳定性，光谱稳定性以及在站点上观察到的典型光谱。

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