随着全球定位系统(GPS)的普及,GPS双频信标的测量已成为获取电离层TEC参数的主要手段,这一方法在当前应用广泛。通过结合局域与全球的GPS观测站网络,数据可以实时采集、处理并传输。利用TEC mapping技术,我们可以实时监测大范围电离层的TEC变化,这对于地震电离层前兆研究具有重要意义。中国地震预测研究所利用...
TEC mappingneural networks[1]Characterization and modeling of ionospheric variability in space and time is very important for communications and navigation. To characterize the variations, the ionosphere should be monitored, and the sparsity of the measurements has to be compensated by interpolation ...
通过实时处理与传输,并采用不同的TECmapping方法,可以进行大范围电离层TEC的现报,这在当前空间天气研究...
一般而言,首先需要将场景渲染成2D纹理或者其他图像的形式,再进行图像处理,这里的图像处理,往往指的是后处理(post effects)。而下文将介绍到的颜色校正(Color Correction)、色调映射(Tone Mapping)、镜头眩光和泛光(Lens Flare and Bloom)、景深(Depth of Field)、运动模糊(Motion Blur),一般而言都是后处理效果。 ...
The Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) carried by the Advanced Land-Observing Satellite was designed to generate worldwide topographic data with its high-resolution and stereoscopic observation. For this objective, the on-orbit geometric performance of PRISM sensors has been...
准确的说,法线贴图是Bump Mapping(凹凸贴图)的其中一种。第一个Bump Mapping由Blinn在1978年提出,目的是以低代价给予计算机几何体以更丰富的表面信息。30年来,这项技术不断延展,尤其是计算机图形学成熟以后,相继出现了不少算法变体,法线贴图就是其中很重要的一种。研究人员对法线贴图进一步改进,出现了Parallax Mapping...
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where 𝑀𝐹𝐼MFI is the mapping function: 𝑀𝐹𝐼=𝑠𝑡𝑒𝑐𝑣𝑡𝑒𝑐=1(1−(𝑅𝑒𝑅𝑒+ℎ𝑠𝑐𝑜𝑠𝜃)2)1/2MFI=stecvtec=1(1−(ReRe+hscosθ)2)1/2 (10) and 𝑅𝑒Re is the mean radius of the Earth; 𝜃θ is the elevation angle of the ...
where 𝑀𝐹𝐼MFI is the mapping function: 𝑀𝐹𝐼=𝑠𝑡𝑒𝑐𝑣𝑡𝑒𝑐=1(1−(𝑅𝑒𝑅𝑒+ℎ𝑠𝑐𝑜𝑠𝜃)2)1/2MFI=stecvtec=1(1−(ReRe+hscosθ)2)1/2 (10) and 𝑅𝑒Re is the mean radius of the Earth; 𝜃θ is the elevation angle of the ...