A calibration target for the support of airborne and satellite measurements was built at the Järvselja site for ecological and remote sensing studies located in southeastern Estonia. The calibration target is a 10 × 10 m concrete panel which is protected by a removable roof. Optical properties of the panel are carefully studied in order to serve as a reference in spectroscopic remote sensing measurements. In this study we report the spectral distribution of reflectance in the wavelength range of 350–2500 nm, the angular distribution of directional reflectance and the linear polarization of the reflected radiation. The reflectance spectrum of the panel is smooth in the visible and NIR wavelengths but with steep decrease at wavelengths less than 400 nm. Variations of reflectance over the panel surface are less than 1%. The radiation is partly polarized in forward scattering direction. No temporal changes of optical properties have been observed. The calibration target improves the metrological quality of airborne spectral measurements at the Järvselja test site and neighboring areas. It can also be used for ground truth to aid the validation of adjacency correction algorithms for data from high spatial resolution satellite images, as well as a reference for the registration of airborne and satellite images. It can also serve as an elevation reference for both lidar and radar altimeter measurements.

在位于爱沙尼亚东南部的Järvselja站点建立了用于支持机载和卫星测量的校准目标，用于生态和遥感研究。校准目标是一块10×10 m的混凝土面板，该面板由可移动的屋顶保护。仔细研究了面板的光学特性，以作为光谱遥感测量的参考。在这项研究中，我们报告了在350–2500 nm波长范围内反射率的光谱分布，方向反射率的角分布和反射辐射的线性偏振。面板的反射光谱在可见光和NIR波长处是平滑的，但在小于400 nm的波长处会急剧下降。面板表面反射率的变化小于1％。辐射在前向散射方向上部分偏振。没有观察到光学性质的时间变化。校准目标可提高Järvselja测试地点及邻近地区的航空光谱测量的计量质量。它也可以用于地面真相，以帮助验证来自高空间分辨率卫星图像的数据的邻接校正算法，以及用于机载和卫星图像配准的参考。它也可以用作激光雷达和雷达高度计测量的高程参考。它也可以用于地面真相，以帮助验证来自高空间分辨率卫星图像的数据的邻接校正算法，以及用于机载和卫星图像配准的参考。它也可以用作激光雷达和雷达高度计测量的高程参考。它也可以用于地面真相，以帮助验证来自高空间分辨率卫星图像的数据的邻接校正算法，以及用于机载和卫星图像配准的参考。它也可以用作激光雷达和雷达高度计测量的高程参考。