radarsat 中文意思是什麼

radarsat 解釋
加拿大衛星
  1. After the introduction of the wavelet theory and the principle of wavelet - based image fusion, we test the radarsat and landsat images using gray - value algorithm

    在對小波變換的基本理論和其用於融合的原理進行介紹之後，我們利用了灰度值選擇運算元針對radarsat和landsat圖像進行了相關實驗。
  2. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  3. The currently available satellites, however, are single polarization, single frequency sensors such as ers - 1 / 2, radarsat, and jers - 1. there is a need to develop a technique to estimate soil moisture information from these available data sources at both regional and local scales

    傳統的測量方法，如重量法測量和時域反射計都是基於點的測量方法，需要實地操作和煩雜的后處理過程，而且無法在要求的時間精度范圍內得到地表土壤水分的空間分佈信息。
  4. Some features and feature groups that can well show the characteristics of urban environment are founded through experiment to compare the performances of different features. for all the researches in this paper, the radarsat images in 1998 and 2000 and the spot image in 2000 of beijing and field survey data are used to validate. the experimental result demonstrates that a higher change detect accuracy can be obtained < wp = 4 > through the texture differencing method than through the image differencing method based on gray level and the wide application of texture differencing method for urban change detection in sar images

    本文開展的各項研究工作，均使用北京地區1998年、 2000年radarsat圖像、 2000年spot圖像及實地考察數據進行了驗證，實驗結果表明，與灰度差值法相比，本文所提出的紋理差值變化檢測方法獲得了更好的檢測結果，也表明了紋理差值變化檢測方法在合成孔徑雷達圖像和變化檢測中良好的應用前景。
  5. In this study, we demonstrate a technique using the multi - temporal c band hh polarized radarsat scansar data to estimate the relative soil moisture change. the experiment data from sgp97 covered a whole range of vegetation growing season and different type agriculture fields

    研究證明，星載合成孔徑雷達（ sar ）得到的地表後向散射系數與地表介電常數有直接相關關系，從而能夠在水文模型要求的精度范圍內有效提取地表土壤水分信息。
  6. Based on the method described above, experiments are taken on multitemporal radarsat images. we obtain satisfactory results and validate the availability of this method on sar image registration

    採用上述方法，本文對不同時段、不同季節拍攝的sar圖像進行了實驗，獲得了較滿意的配準結果，驗證了本方法對sar圖像的適用性。
  7. When it comes to feature - based image fusion, we make use of mean - shift to extract appropriate features according to the characteristics of radarsat and landsat images, then apply the bayes theory to feature level fusion classification

    在特徵級的圖像融合中，我們針對radarsat和landsat圖像的特點，採用滑動窗方法提取適當的特徵，然後用bayes理論來進行特徵層的融合分類。
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