zenith angle distribution

基本解釋

When using a single reference to measure the bi-directional scattering distribution function (BSDF), the incident zenith angle of the tested sample must be identical to that of the reference.
采用單一參考測量雙向散射分布函數(shù)時，要求被測試樣與參考標準的入射天頂角必須相同。
Some results of high energy cosmic ray, such as the zenith angle distribution, the decay length in the air, the energy spectrum and the vertical intensity of hadron and γ-ray have been presented.
由此給出了天頂角分布、大氣中衰減長度、積分能譜和垂向流強等，為研究宇宙線超高能相互作用提供了信息。