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NDVI dates:
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agriSatwebGIS®
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Landsat 9
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\begin{equation} \text{In TONIpbp, let}\,R\,\text{ be }\sum_{t=0}^{t=n}{\text{ET}_t}\implies R=\int{\big(m\times f(t) + b\big)\times g(t)\,\,\mathrm{d}t} \end{equation} \(\text{being}\,\,\mathrm{d}t=24\,\text{h},\,\,f=\text{NDVI},\,\,g=\text{ET}_0,\,\,m =\)
\(,\,\,b=\)
\begin{equation} \text{Hereby, instead, let}\,R\,\text{ also be }\sum^{t=n}_{t=0}{\text{ET}_t}\implies R=\int{\Big(k_s\times\big(m\times f(t) + b\big) + k_e\Big)\times g(t)\,\,\mathrm{d}t} \end{equation} \(\text{being all above and}\,\,k_s=\)
\(,\,\,k_e=0\)
\(\text{Ok, I got it. Now}\)
\(\text{above formula}\)
\(\text{And do it}\,\forall t\)
since
until
\(\text{but only as long as any of following three cases occurs:}\)
1. \(f(t)\ge L_l\,\wedge\,\nexists t_a|t_a\lt t,\,f(t_a)\ge L_h\)
2. \(f(t)\ge L_h\,\wedge\,\exists t_a|t_a\lt t,\,f(t_a)\le L_h\)
3. \(t\le\)
\(\text{being}\,\,L_l=\)
\(,\,\,L_h=\)