short range radar 中文意思是什麼
short range radar
解釋
短程雷達-
To compensate centimeter wave ' s shorting comings such as broad beam and short effective range, a transponder is added in the back of target automotive. this secondary radar measures range in the way of transponding
為了彌補厘米波波束大、作用距離不如毫米波的缺點，系統在目標車輛的尾部增加了一級轉發器，以雙機應答的方式測量車距。 -
Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation
低分辨isan成像及干涉技術應用研究一因此直接無法分辨編隊目標的架數，我們借鑒isar的技術，通過較長時間的相干積累，在多普勒頻域上對目標進行分辨。而對于編隊目標，可分為近似剛性的多目標和非剛性的多目標，所以對于可以近似為剛體的編隊目標相對位置固定，運動方式一致，可以近似看作一個大目標，採用最小墑準則對平動相位的進行補償，但是大多數並不滿足剛體近似的編隊目標，由於目標在相干積累時間的多普勒頻率近似呈線性變化，通過對較短數據利用relax的時頻分析方法，提高了頻率域上目標分辨的性能。由於橫向解析度取塊于橫向積累時間，所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨，對模擬和實測數據的大量分析結果表明此方法的有效性和可行。 -
Popular automotive anticollision radar is required to measure the velocity and angle of its targets as well as range. therefore, the short - wavelength high - resolution millimeter wave is used, measuring range and velocity through fmcw scheme, measuring angle through multi - beam scanning
通行的汽車防撞雷達採用了波長短、測量精度高的毫米波，以調頻連續波制式測量距離和速度，以多波束掃描的方式測量角度。 -
A short range psr is installed at sha chau to detect aircraft operating within the approach and departure areas of the hkia. secondary surveillance radar ( ssr )
一臺短程的一次雷達已安裝于沙洲，用以探測機場進場及離場范圍內的飛機。 -
A spokesman said : " the research could lead to radar - based collision avoidance and road recognition systems becoming standard on every new car within a decade, and advanced short - range sensors to improve pedestrian protection.
其中一位發言人說： 「該項研究能夠避免基於雷達間的沖突，未來十年裡，在每一輛車上，都安裝有道路識別系統，先進的短程傳感器能夠加強對路上行人的防護。 」 -
Apart from the above weather stations, meteorologists from the three places also established over the years the exchange of real - time weather information through dedicated data lines, the networking of weather radar data from the area, and the closer consultation among forecasters in these places during the approach of severe weather. currently in progress is the expansion of swirls ( short - range warning of intense rainstorms in localised systems ), developed by the hong kong observatory, to a rainstorm forecasting system covering the pearl river estuary
除上述氣象站外，三方的氣象人員多年來還實現了利用專用數據線路交換實時氣象資料、將三地的天氣雷達數據聯網、以及加強了三方預報員進行重要天氣評估的磋商等。目前正開展工作，以香港天文臺開發的小渦旋暴雨臨近預報系統為基礎，致力擴展成一套覆蓋整個珠江三角洲的暴雨預報系統。
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