weather signal 中文意思是什麼
weather signal
解釋
氣象信號-
Jakarta - - rescue teams have been dispatched after a commercial adam air passenger plane with more than 100 people onboard sent out a distress signal over sulawesi island while flying in bad weather conditions, the transport minister said monday
雅加達? ?周一交通部長稱，一架載客百餘人的印尼亞當航空商用客機遇惡劣天氣，在蘇拉維西島上空發出緊急救援信號，政府已派遣救援隊前往營救。 -
Gps is a planet wireless conductance system which is global and all - weather, gps can offer high precision time orientation information to infinite user, clock precision reachs 10 ? 6 magnitude 。 not only changes traditional time method of quartz crystal clock, but also replaces wireless shortwave and even more lowfrequency signal and tv signal whose overlay range is limited and low precision, offers advantage to geology field task, achieve automatization and high precision of seismic flow observation
利用gps授時信號全方位、全天候、連續性、實時性和高精度的特點，以gps信號為基準來校準本地時鐘（晶體振蕩時鐘或原子鐘） ，將gps接收機輸出信號的長期穩定度和恆溫晶振的短期穩定度相結合，應用大規模可編程邏輯器件，設計和實現了由pc104控制的實時在線授時系統。 -
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。 -
Then, we introduce the basic structure of pd weather radar signal processing system and their function of each subsystem, mainly including intermediate frequency receiver, clutter elimination, range correcting and smoothness, ambiguity resolution and spectrum estimation
並在此基礎上介紹了氣象雷達信號處理系統的基本構成與各部分的主要功能，主要包括氣象回波中頻接收、雜波抑制、距離訂正、平滑處理、解模糊和譜矩估計等。 -
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。 -
First in this paper, we review the development of radar signal processing and cfar detector, analyse the structure and principle of the signal processor, ca - cfar and os - cfar detectors. then, in view of the characteristic of prc cw signal, analyses the statistics characteristic of scattering bodies, models of target, noise, ground - clutter and weather - clutter are made. these lay a theoretic foundation of signal processing and cfar detector
然後，本文針對x波段偽隨機m序列相位編碼連續波信號體制，分析了各種散射體的統計特性，對雷達目標及檢測背景噪聲（熱噪聲、地雜波和氣象雜波）進行了理論分析和統計檢驗，建立了目標及檢測背景的目標模型，確立了信號處理和恆虛警檢測的理論基礎。 -
Programmes will be cancelled under the following weather conditions : 1. typhoon signal no. 1 no
1 .若懸掛黃色暴雨警告訊號，活動照常舉行，會員可自行決定是否仍然參加。 -
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。 -
In hong kong, the standby signal no. 1 was issued at 2. 40 p. m. on 10 september, shortly after hagupit formed at about 460 km to the southeast. on 10 september, the weather was at first hazy with light to moderate northerly winds
在天氣方面，本港於九月十日初時吹輕微至和緩北風及有煙霞，而黑格比的外圍雨帶則由下午開始為本港帶來狂風驟雨及雷暴。 -
For engineering application, the signal processing technology of airborne forward ? ooking windshear weather radar system is studied in this composition. the contents include signal processing methods for weather, turbulence and windshear targets
本文從工程應用出發，綜合研究了機載前視風切變氣象雷達系統的信號處理技術，研究內容包括氣象、湍流和風切變目標的信號處理。 -
Sir lok could still recall the time when he worked at the weather station in cape collinson. making weather observations outdoors amidst a typhoon when the no. 8 signal was up was no small feat. the only precautionary measure was a rope around his waist, tied to some bulky furniture inside the station building
樂哥回想當年駐守哥連臣角氣象站時，遇上臺風襲港，八號風球高懸，要到戶外進行天氣觀測，他的防風措施便是腰纏大麻繩，再把繩的另一端綁扎于站內的大傢俱上。 -
As 22 january 1999 was a fine day, the signal returns captured by the terminal doppler weather radar tdwr were too weak and the westerlies were too shallow for any windshear event to be detected using tdwr data
由於一九九九年一月二十二日天氣晴朗，機場多普勒天氣雷達tdwr收集到的回波訊號相當微弱，而且西風也太淺薄，以致未能根據tdwr數據探測到風切變現象。 -
As 22 january 1999 was a fine day, the signal returns captured by the terminal doppler weather radar tdwr were too weak and the westerlies were too shallow for any windshear event to be detected using tdwr data. a windshear alert had been issued following receipt of aircraft report
由於一九九九年一月二十二日天氣晴朗，機場多普勒天氣雷達（ tdwr ）收集到的回波訊號相當微弱，而且西風也太淺薄，以致未能根據tdwr數據探測到風切變現象。 -
As 22 january 1999 was a fine day, the signal returns captured by the terminal doppler weather radar ( tdwr ) were too weak and the westerlies were too shallow for any windshear event to be detected using tdwr data. a windshear alert had been issued following receipt of aircraft report
由於一九九九年一月二十二日天氣晴朗，機場多普勒天氣雷達（ tdwr ）收集到的回波訊號相當微弱，而且西風也太淺薄，以致未能根據tdwr數據探測到風切變現象。 -
When we was three - quarters of a mile below we hoisted up our signal lantern ; and about ten o clock it come on to rain and blow and thunder and lighten like everything ; so the king told us to both stay on watch till the weather got better ; then him and the duke crawled into the wigwam and turned in for the night
十點鐘光景，又是大雨傾盆，又是雷電交加，鬧得不可開交，所以國王交代我們兩人都要留心看守好，一直要等到天氣好轉。隨后，國王和公爵爬進窩棚宿夜。下邊是該我的班，要值到十二點鐘。 -
There is even a typhoon bulletin page that is activated after signal 8 is hoisted, with updates aimed at helping hong kong weather the storm
當懸掛八號臺風訊號時，網站更有臺風報道網頁提供最新消息，幫助香港安然渡過風暴。 -
Though the hurricane signal no. 10 was still in force at that time, the relatively calm weather in the eye of the typhoon gave hong kong a temporary break from rain and winds that morning
雖然當時十號颶風信號仍然生效，但由於香港處于風眼內相對平靜的天氣中，所以當天早上風和雨都稍為歇息。 -
The method has distinct advantages as fllows : ( 1 ) microwave radiometer itself do not radiate electromagnetic wave, so it have the attribute of concealment. ( 2 ) microwave radiometer is not directly disturbed by other eleclro - magnetic signal, and it can work in all weather condition. ( 3 ) power loss and equipment volume are greatly decreased than usual radar
此方法具有： （ 1 ）本身不發射電磁波信號，具有隱蔽性； （ 2 ）不受到其他電磁信號直接干擾，並可以全天侯工作； （ 3 ）功率損耗和整機體積比一般雷達大大減小。
分享友人