查詢結果分析
來源資料
相關文獻
- Potential for Using FORMOSAT-Ⅱ Data Simulated by Hyperspectral Reflectance to Estimate Growth and Predict Yield of Rice
- 水筒模式與降雨一逕流模擬
- 電腦模擬在鈦合金四面精鍛製程設計之應用
- 從電腦模擬看擺輾鍛造之特性
- 移植Windows CE至新硬體平臺之問題與分析
- 微控制器嵌入式系統的開發環境
- Time Domain Simulation of Data Buoy Motion
- 貯槽邊界影響顆粒流動行為之電腦模擬研究
- Direct Simulation Monte Carlo of Monosilane Low Pressure Chemical Vapor Deposition
- 病人候診時間之模擬研究--以某醫學中心家庭醫學科為例
頁籤選單縮合
題 名 | Potential for Using FORMOSAT-Ⅱ Data Simulated by Hyperspectral Reflectance to Estimate Growth and Predict Yield of Rice=以高解析反射光譜模擬福衛二號衛星資料估測水稻生長及預測產量之潛力 |
---|---|
作 者 | 楊純明; 陳榮坤; | 書刊名 | 臺灣農業研究 |
卷 期 | 54:1 民94.03 |
頁 次 | 頁54-69 |
分類號 | 434.111 |
關鍵詞 | 福衛2號衛星; 高解析反射比; 水稻生長估測; 產量預測; 模擬; FORMOSAT Ⅱ.; Hyperspectral reflectance; Rice growth estimation; Yield prediction; Simulation; |
語 文 | 英文(English) |
中文摘要 | 本研究旨在利用近地面高解析植被反射光譜模擬福衛二號衛星(FORMOSAT-II) 光譜測值以評估應用於水稻(Oryza sativa L. cv. TNG 67) 生長估測與產量評估之潛力。田間試驗係在臺中縣霧峰鄉農委會農業試驗所農場進行,以量測2000-2002年兩期稻作之植被光譜、葉面積指數及產量等。福爾摩沙二號衛星承載之紅光(630-690 nm) 及近紅外光(760-900 nm) 寬頻波段測值由高解析光譜之相對累積窄波段測值平均值模擬,並以計算 窄波段及寬波段之標準差植被指數(NDVINB 及NDVIFORMOSAT-II)。結果顯示NDVINB及NDVIFORMOSAT-II 在水稻生育期間呈現曲線分佈,而NDVIFORMOSAT-II 概低於NDVINB。實際量測之葉面積指數(LAImeasured)與NDVINB 之間為一指數函數關係,並據以輸入NDVINB 及NDVIFORMOSAT-II而估算出LAINB 及LAIFORMOSAT-II 。又發現生育期間估測之LAIFORMOSAT-II 均小於LAINB,且這些估值自移植後55 天起皆低於LAImeasured 。結果也顯示,產量可由生育某段期間LAImeasured 累加值預測,當由LAINB 及LAIFORMOSAT-II 取代時,產量預測值將低於實測值。顯然地,模擬福爾摩沙二號衛星寬波段測值將獲得小於地 (ground truth) 資料之生長估測與產量預測。 |
英文摘要 | This study assessed the potential for using FORMOSAT-II data, simulated by ground-based remotely sensed high resolution reflectance spectra, to estimate growth and predict yield of rice (Oryza sativa L. cv. TNG 67) crops. Field experiments were conducted in the Taiwan Agricultural Research Institute Experimental Farm at Wufeng to measure canopy reflectance spectra, leaf area indices (LAImeasured), and yields of rice grown in the cropping seasons from 2000 to 2002. Reflectance values of broadband sensors equipped in the satellite FORMOSAT-II were simulated by using the mean values of reflectance in the respective band regions obtained from hyperspectral data. The values of normalized difference vegetation index (NDVI) were calculated using the mean reflectance in red (630-690 nm) and near-infrared (760-900 nm) regions defined in FORMOSAT-II. Both NDVINB, which was computed from narrow bands of hyperspectral data, and NDVIFORMOSAT-II, which was computed from simulated FORMOSAT-II data, showed a quadratic time trend during rice growth. Changes in NDVIFORMOSAT-II nearly paralleled the changes in NDVINB, but to a lesser extent. The relationship between LAImeasured and NDVINB was fitted well by an exponential function, through which the estimates of satellite LAI (LAIFORMOSAT-II) were obtained. Results further showed that values of LAIFORMOSAT-II were lower than values of LAINB along plant development, while both of these estimated LAIs were lower than LAImeasured after approximately 55 days after transplanting. Results indicated that yield may be predicted by the accumulated values of LAImeasured during the growing periods. By substituting LAImeasured with the values of LAINB and LAIFORMOSAT-II, it was found that the predicted yields were lower than the measured yields. Results suggest that the lower predicted yield by the FORMOSAT-II satellite data is attributable to lower level of LAIFORMOSAT-II as aforementioned. |
本系統中英文摘要資訊取自各篇刊載內容。