TCI 328-2024 被動光學衛(wèi)星遙感淺水水下地形反演技術規(guī)范

T/CI328—2024被動光學衛(wèi)星遙感淺水水下地形反演技術規(guī)范Technicalspecificationforshallowwaterbathymetryusingpassiveopticalsatelliteremotesensing中國國際科技促進會發(fā)布I 2 2 2 3 3 3 5 5 5 6 6 6 6 6 6 7 9本文件按照GB/T1.1—2020《標準化工作導則第1部分：標準化文件的結(jié)構(gòu)1本文件適用于采用被動光學衛(wèi)星遙感對不超過1倍塞氏盤可見深度的大洋水體進行的水下地形反演2規(guī)范性引用文件被動光學衛(wèi)星遙感passiveopticalsatel不接觸物體本身，衛(wèi)星傳感器被動接收目標物的可見光-近紅外電磁波信息，經(jīng)處理、分析后，識水體其固有光學參數(shù)的變化主要由浮游植物及其附屬物的變化決定2MRE:平均相對誤差(MeanRelativeError)3被動光學衛(wèi)星衛(wèi)星遙感影像篩選遙感影像處理輻射校正耀斑校正基于波譜匹配的查找表法水下地形反演基于波譜匹配的查找表法非線性光譜優(yōu)化法產(chǎn)品質(zhì)量檢查水下地形提取產(chǎn)品注：在一般情況下，空間分辨率優(yōu)于30m更有利于水下地形衛(wèi)星遙感選擇與測量任務需求時間相近的、成像質(zhì)量等可見光波段和近紅外波段(770-89a)影像層次豐富、色彩清晰、色調(diào)均勻、反差適b)影像無傳感器條帶噪聲，主要工作區(qū)無明顯環(huán)境噪聲。47.2.1.1.2波段的輻射亮度應依據(jù)以下計算公式計算：=?+··················································(1)a)應在影像上選取明顯清晰、便于識別和相對固定的點位標志作b)控制點在影像上均勻分布；b)對選取區(qū)域內(nèi)的像元，以近紅外波段為軸，以可見光波段為軸進行統(tǒng)計回歸分析，確定斜c)根據(jù)耀斑校正公式獲取整幅影像耀斑()=()?()[()?()]································(2)()——近紅外波段地表反射率值。7.2.4.1使用提取遙感影像水體，將陸地進行掩膜處理。的計算7.2.4.2值計算公式如下：=···············································(3)5……6c)逐點將高光譜遙感影像預處理后的遙感反射率檢索“遙感反射率光譜-水深”查找表，波譜匹配水體反射率的查找表項(通常以最小二乘誤差最小為匹配準則)。該項對應的水深即所求水9成果質(zhì)量檢查9.1精度評價 H?——反演水深值；n——實測水深樣本數(shù)量。9.1.3在0～10m水深范圍內(nèi)，RMSE應小于2m;在10～20m水深范圍內(nèi)，MRE應小于20%。9.2水下地形反演產(chǎn)品質(zhì)量檢查9.2.1檢查因船舶、養(yǎng)殖箱等水面設施遮擋水下光學信號造9.2.3產(chǎn)品質(zhì)量檢查與驗收符合GB/T24356和GB/T18316的要求。9.2.4地圖注記、圖式及圖廓等具體要素符合GB/T20257中的要求。10成果整理與上交10.1成果提交要求10.2成果提交內(nèi)容7A.1非線性光譜優(yōu)化法=·································································(A.1)根據(jù)光學淺水中單次及準單次散射理論以及單一=1.03(1+2.4)0.5···························································(A.3)=1.04(1+5.4)0.5·························································(A.4)=/(+)································································(A.5)=+·····································································(A.6)=+·································································(A.7)=+?+····························································(A.8)——吸收系數(shù)；?——浮游植物色素吸收系數(shù)。=······································································(A.9)=0+12·······························································(A.10)=(0.084+0.170)·······················································(A.11)()=[(),(),(),,,,]·········································(A.12)1)=[(1),(1),?(1),(1),(1),(1),](2)=[(2),(2),?(2),(2),(2),(2),]…8?(),(),(),(),]····················(A.13)其中：(),()為已知量，因此，對于每一個()光譜，有4個與光譜有關的未知量?(),(),(),()和1個與光譜無關的未知量?()=[0()+1()()]···············································(A.14)——波長440nm處的浮游植物色素吸收系數(shù)，=?(440)；1()=?(?400)··························································(A.15)——光譜斜率，=0.015?1為經(jīng)驗系數(shù)，取值0.011-0.021nm?1。()=(550/)···························································(A.16)()=+··································································(A.17)半解析模型引入?yún)?shù)化模型后，遙感反射比方程組能改寫為僅有5個未知量的方程組，見公式1)=[(1),(1),,,,,](2)=[(2)