beam pointing 中文意思是什麼
beam pointing
解釋
波束指向-
First, based on phased array antenna ' s mono - pulse goniometry and separate coordinate technology about phase control, the antenna beam pointing error formula, caused by phase quantization error, is derived from linear array and circular array to planar array and cylindrical array
首先以單脈沖相控陣天線測角原理為基本理論出發點，利用相位控制的坐標分離技術，基於線陣、圓形陣等簡單形式的相控陣天線，推導了平面陣、圓柱面陣等相控陣天線由相位量化誤差引起的波束指向誤差公式。 -
Their maximum and variance of beam pointing accuracy are much smaller than the results of round - off method. deficiently, only ordinary antennas are studied here, circular array and cylindrical array, for example. farther study about complex and anomalous conformal antennas is expected
不過，本文中只對簡單形式的共形陣天線，如圓形陣、圓柱面陣天線進行了分析，復雜的不規則的共形陣天線的情況還有待于進行進一步的研究。 -
Then, the capacities of round - off method, two probable value method ( tpvm ), shift and compensate phase feeding method ( scpfm ) and shift compare and compensate phase feeding method ( sccpfm ), are compared in improving the accuracy of beam pointing
接著，通過模擬實例比較了舍尾法、二可能值法、遞推補償饋相法、遞推比較補償饋相法等幾種提高波束指向精度方法的優劣。 -
Beam riding systems use a target tracker whose purpose is to maintain the antenna boresight pointing at the centre of the reflecting area of the target.
波束制導系統使用一個目標跟蹤裝置，它的目的是保持天線視軸指向目標反射的中心。 -
The key for phased array antennas with good functions is the use of controllable phase shifters. however, phase quantization errors affect the accuracy of phased array antenna beam pointing badly, which is mainly researched here
其中可控數字移相器的使用，是相控陣天線優越性能實現的關鍵，但由此引入的相位量化誤差，嚴重影響了相控陣天線的波束指向精度。 -
1550nm is chosen as the work wavelength, cassegrain transmitting - receiving antenna as the optical antenna of the system through the elucidation of how to choose the work wavelength and optical antenna of comm - unication system. the structure and theoretical design parameter of apt sub - system have been presented through the discussion of the optical signal power estimation of apt sub - system, beam divergence angle, pointing error, and error signal extraction. compared with existed optical wireless communication system, the design scheme proves applicable
通過對通信系統工作波長選擇、光學天線選擇等闡述，選擇了1550nm作為系統工作波長、卡塞格倫（ cassegrain ）收發合一天線作為系統光學天線；通過對apt子系統功率測算、束散角和瞄準誤差、誤差提取信號等的討論，給出了apt子系統結構和理論設計指標，並將其與現有的光無線通信系統進行比較，說明該設計方案是可行的。 -
The new genetic laws observed recently in the ion - beam - induced wheat, and the advance in wheat breedings through ion - beam - mediated transfer of null dna molecule, were also presented thus pointing out the critically unsolved questions and perspectives of ion beam technology in the field of wheat breedings
還介紹了最近發現的離子束誘變小麥遺傳新規律和離子束輔助外源裸露大分子dna轉移在小麥育種中的新進展，提出了離子束生物技術在育種領域急待解決的問題和應用前景。 -
Influence on performance of interference localization using satellite multiple - beam antenna with pointing error
衛星多波束天線指向誤差對干擾源定位性能的影響
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