digital weather radar 中文意思是什麼
digital weather radar
解釋
數位式氣象雷達-
The hong kong observatory ( hko ) has launched a personal digital assistant ( pda ) website today ( april 8 ). this pda website enables the public to obtain weather information such as weather radar images, rainfall distribution maps and regional weather data anytime anywhere
香港天文臺今日（四月八日）推出個人數碼助理網站，讓市民不論何時何地均可取得雷達圖像、雨量分布圖和香港各分區天氣等資料。 -
Secondly, we discuss the application of if sampling and digital demodulation technique in pd weather radar signal processing system
其次，本文研究了中頻采樣及數字解調技術在氣象雷達中的應用。 -
This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system
本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。 -
The theoretic analysis and computer simulation results reveal that this influence ca n ' t be ignored. because the if sampling and digital demodulation technique can improve amplitude and phase unbalances of in - phase and quadrature channels, we apply it in the pd weather radar signal processing system and select several digital demodulation algorithms, which are easier to implement, for this system
由於採用中頻采樣和數字解調技術能有效地提高正交解調兩路的幅相一致性，本文將中頻采樣及數字解調技術應用到脈沖多普勒氣象雷達信號處理系統中，並結合氣象信號的特點選擇了適合工程實現的中頻采樣及數字解調演算法。 -
Thirdly, we study several ground clutters elimination algorithms combining the properties of ground clutters and we get the conclusion that the frequency domain algorithm has better performance through extensive analysis and comparison. finally we proposed a typical pd weather radar digital signal processing system realization project including the software and hardware implementation
本文還結合氣象雷達地雜波的特點詳細研究了各種濾除地雜波濾波演算法，在對各種濾波演算法進行分析和折中考慮之後，選擇地雜波頻域濾波演算法應用於本信號處理系統。 -
Sar interferometry is an established technique for the estimation of the height location of scatterers, through the phase difference in images acquired from spatially separated locations at either end of a baseline. interferometric synthetic aperture radar ( insar ) can provide accurate digital three - dimensional topographic measurement with all weather conditions day and night
干涉合成孔徑雷達（ insar ）利用合成孔徑雷達（ sar ）系統從空間分離的兩個位置對同一區域成像，由相位差與路徑差的關系來提取目標的高程信息，能夠全天時、全天候的獲取大面積、高精度三維地形數據。 -
Applications of digital weather radar echo information to artificial influence on weather
數字化天氣雷達回波資料在人工影響天氣工作中的處理應用
分享友人