The experimental value of the target plate ′ s hemisphere reflectivity is 24.9 % the real value of it is 25.3 % the relative error is 1.6 % which satisfies the accuracy requirements of outfield test .

实验测得的 目标 靶板 反射率为24.9%，与实际标定值25.3%的相对误差为1.6%，满足10%的外场精度要求。

It is always the emphasis to improve the resolution for reconstructing target reflectivity in research of inverse synthetic aperture radar ( ISAR ) imaging .

提高 图像分辨率一直是 ISAR研究的重要内容，常规的ISAR成像算法在这方面存在着不足。

Usually conventional incoherent weather radar is used to provide only the information on the position of a weather target and its radar reflectivity by detecting echo intensity .

通常非相干的常规天气雷达的应用仅仅是通过雷达回波强度的探测来提供天气 目标 物的位置和其 反射率的信息。

As the laser power density changed from 1.68 × l04 to 6.08 × 104W / cm2 with target surface roughness 1.6 ~ 3.2 μ m the reflectivity reduced from 0.90 to 0.8 for long pulses .

在大气、室温环境下， 靶表面粗糙度为1.6～3.2μm，激光功率密度由16.8kW/cm~2上升至60.8kW/cm~2时，长脉冲激光 反射率由0.90降至0.80。

The contrast between target and its background is decided by their reflectivity .

目标与背景在 可见 光 波段的对比度取决于目标与背景的 反射率；

Some different thickness aluminum reflective films were produced on silicon substrate by using the electron-beam evaporation method and high purity aluminum target . The reflectivity curves of Al film in the visible light region were measured the density and conductivity of films were analyzed .

采用电子束蒸发的方法，以高纯度的Al为 靶材，硅片为衬底，制备了不同厚度的Al反射膜，并测量了在可见光范围内 反射率曲线，分析了薄膜的致密性和电导率。

As sputtering power of Mo target was increasing surface roughness of Mo / Si film was increasing characteristic diffraction peak of Mo species became stronger and stronger furthermore soft X-ray peak reflectivity of Mo / Si multilayers first increased and then reduced .

研究发现，随着Mo 靶溅射功率的增大，Mo/Si多层膜的表面粗糙度增加，Mo的特征X射线衍射峰也增强，Mo/Si多层膜的软X射线峰值 反射率先增大后减小。

Reflector board ( cooperative target ) reflectivity measuring instrument

反光板（合作 目标） 反射率测量仪

The visibility measurement error caused by non-blackbody target is analyzed . It is shown that the relative measurement error increases along with the increase of the visibility and the target 's reflectivity . To ensure the measurement precision the target with reflectivity low enough is required .

作者对非黑体目标引起的测量误差进行了分析，结果表明相对误差随着 目标物 反射率的增加和能见度的升高而增大，为了保证测量精度，需要采用反射率足够低的目标物。

The dark target method developed by Kaufman is one of methods to retrieve the aerosol optical depth using MODIS data . But there is limitation in getting the surface reflectivity of visible channel .

Kaufman的暗 像元方法是目前利用MODIS卫星资料反演气溶胶光学厚度的方法之一，但在获取可见光通道地表 反射率时存在局限性。

Wavelength Band Selection Method for Target Detection Considering Surface Reflectivity

根据表面 反射 特性进行 目标探测的波段选择

This paper introduces the development study of Reflector board ( cooperative target ) reflectivity measuring instrument .

本文介绍了反光板（合作 目标） 反射率测量仪的研制。