earth antenna 中文意思是什麼

earth antenna 解釋
地下天線
  • earth : n 1 〈常E 〉 地球。2 大地，陸地，地面，地上。3 土壤，土。4 【化學】土類；泥。5 世界人類；人的軀體...
  • antenna : n. （pl. -nae , antennas）1. 【動物；動物學】觸角。2. 【無線電】天線〈英國常用 aerial〉。
  1. The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering

    本文從星載雷達的星地幾何關系入手，舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型，研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法，並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體，完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析，最後完成雷達回波信號的模擬。
  2. Satellite earth antenna

    衛星接收天線
  3. While carrying out the scheme, at first, the basic theory of antenna, array antenna and electromagnetic absorption, the performance parameter of antenna and parabolic antenna are deeply researched. in conformity, the characteristic and calculation of aperture field and near - to - far - field transformation for radiation pattern are detailed analyzed. second, the factors such as, the amount of the antenna elements, mutual coupling between each element, ground and the buildings on earth ' s surface, which affect the performance of array antennas ’ resultant field are stressed discussed

    在系統實現過程中，課題首先從天線、陣列天線，以及電磁場計算方法的基本理論著手，分析了天線與拋物面天線的各項性能參數，以及天線的口面場和近-遠區輻射場的特點和計算;進而，更加深入的討論和研究影響天線陣列合成場強的各項因素，包括系統所使用的天線單元個數對陣列合成場的影響、天線單元之間由於互耦造成的影響、傳播過程中地面和/或地面建築物的影響等。
  4. A method to determine positions of earth pull - wire on reflector net of cophased horizontal antenna

    同相水平天線反射網到地拉線的位置確定
  5. The result shows that the solar radiation pressure moments play a mainly part. based on kalman filtering, three kinds of attitude determination algorithms were studied using the attitude sensor now available on the explorer : the first based on digital solar sensor ( dss ) and gyroscope when the star sensor is not available ; another based on dss, high - gain antenna ( hga ) and gyroscope when the explorer is in the earth - safe mode ; the third based on star sensor combined with gyroscope when the explorer is in the normal mode

    針對配置了典型測量敏感器的深空探測器，基於擴展kalman濾波給出了其姿態確定的方法:針對星敏感器不可用情形，給出了使用太陽敏感器和速率陀螺定姿的濾波器演算法;針對安全模式下的對地穩定定向情形，給出了太陽敏感器和高增益天線融合速率陀螺信息的定姿演算法;針對正常巡航模式給出星敏感器和速率陀螺聯合定姿演算法。
  6. This photo shows a satellite antenna ( placed next to a us 25 - cent coin ) that is scheduled to orbit earth in 2005

    這張照片展示了一個衛星天線（它旁邊是25美分的硬幣） ，配備該天線的衛星預計在2005年繞地球軌道飛行。
  7. The antenna, able to fit into a 2. 5 by 2. 5 cm space, can receive commands and send data to earth from the space technology 5 ( st5 ) satellites

    天線的尺寸是2 . 5 2 . 5厘米，能從空間技術5號衛星接收命令，並把信息發送給地球。
  8. Methods of measurement for radio equipment used in satellite earth stations - part 3 : methods of measurement for combinations of sub - systems - section five - antenna tracking and control

    衛星通信地球站無線電設備測量方法第3部分:分系統組合測量第5節:無線跟蹤和控制
  9. In the earth displacement respect of real - time supervisory control, the control system of gps multi - antennae will change the traditional method of a gps receiver connecting to a gps antenna, and implement data collection by the method of a gps receiver and multi - antennae

    在大地位移實時監測方面， gps多天線數據控制系統（ gms ）改變了一臺gps接收機與一個gps天線相連的傳統做法，採用1機多天線的方法實現gps數據的採集。
  10. By building the antenna at a location with a poor effective conductivity of the ground, and by grounding the ends of the feedline / antenna, the signal is forced deep down into the earth, making the earth itself the effective radiating element

    通過將天線建造在低導電性的地點，並且將饋線/天線的終端接地，信號被迫深入地球，使得地球本身成為一個有效的輻射單元。
  11. This paper investigates the propagating characteristics of the layered earth in a loop antenna case, the result can be served as a helpful guideline for the system design and application

    對環狀發射天線情形下分層大地的有關通道特性進行了探討，以期為該系統設計及工程應用提供有益的指導。
  12. The segment of a satellite transmission from the satellite to an earth station or receiving antenna ( dish )

    衛星向地面衛星接收機站或天線傳輸的信號。
  13. The satss is an antenna pointing servo system with ultra - low speed and high accuracy, driven by a rare earth permanent magnet ( repm ) brushless dc torque motor. to reduce torque ripple, the repm brushless dc torque motor has a slotless armature, and uses sinusoidal wave driven technology

    衛星天線跟蹤伺服系統為超低速高精度天線指向控制系統，該系統使用稀土永磁式無刷直流力矩電機作為天線的驅動機構，為降低轉矩脈動，電機採用無槽電樞結構設計，並使用正弦波驅動方式。
  14. Methods of measurement for equipment used in digital microwave radio transmission systems - measurements on satellite earth stations - antenna

    數字微波無線電發射系統使用設備測量方法.衛星地面站測量.天線
  15. Methods of measurement for satellite television earth receive - only station. antenna measurement

    衛星電視地球接收站測量方法天線測量
  16. Because an antenna beam has certain width, and the antenna on the earth will point to the adjacent satellites at its side lobe, the transmitting antenna may create interfering radiation ( which is known as uplink adjacent interference ), and the receiving antenna will also be interfered ( which is known as downlink adjacent interference )

    由於天線波束具有一定的寬度，地面發送天線會在指向鄰星的方向上產生干擾輻射（上行鄰星干擾） ，地面接收天線也會在鄰星方向上接收到干擾信號（下行鄰星干擾） 。
  17. Methods of measurement for equipment used in digital microwave transmission systems. part 3 : measurements on satellite earth stations. section 2 : antenna

    數字微波傳輸系統中所用設備的測量方法.第3部分:衛星通信地球站的測量.第2節:天線
  18. Methods of measurement for radio equipment used in satellite earth stations - part 2 : measurement for sub - systems - section one - general - section two - antenna including feed network

    衛星通信地球站無線電設備測量方法第2部分:分系統測量第1節:概述第2節:天線
  19. . 1 methods of measurement for radio equipment used in satellite earth stations ; part 2 : measurements for sub - systems ; section one : general ; section two : antenna including feed network ; amendment no. 1 to iec 60510 - 2 - 1 : 1976

    衛星地面站用無線電設備的測量方法.第2部分:分系統測量.第1節:總則.第2節:天線
  20. This dissertation adopts the modularization programming method to develop the spaceborne sar system design and simulation software, which obtains the windows common interface and logical integrated structure, convenient for usage, maintenance and function extension. 2. as for the earth model and orbit model, according to the properties of spaceborne sar operation, in this dissertation, we reject the sphere earth model and circle orbit model and present a novel way to solve spaceborne geometry relations between radar and target by three ellipses, and achieve the way to determine the target position by antenna pointing direction

    在地球模型和軌道模型方面，論文根據星載合成孔徑雷達工作的特點，摒棄了球地球和圓軌道的傳統模型，創新性的採用三個橢圓解決了星載雷達的星地幾何關系問題，得到了在地球橢球模型和橢圓軌道模型下由雷達天線指向確定目標坐標的方法，為星載合成孔徑雷達系統設計與模擬提供了更為精確的幾何基礎。
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