%%% Preamble Requirements %%%
% \usepackage{geometry}
% \usepackage{amsfonts}
% \usepackage{amsmath}
% \usepackage{amssymb}
% \usepackage{tikz}

% Optional packages such as sfmath set through python interface
% \usepackage{sfmath}

% \usetikzlibrary{arrows,chains,positioning,scopes,shapes.geometric,shapes.misc,shadows}

%%% End Preamble Requirements %%%

\input{"/home/jav/.local/lib/python3.8/site-packages/pyxdsm/diagram_styles"}
\begin{tikzpicture}

\matrix[MatrixSetup]{
%Row 0
\node [DataIO] (output_mission_Inf) {$\begin{array}{c}mission input, database\end{array}$};&
&
&
&
&
&
\\
%Row 1
\node [Function] (mission_Inf) {$\begin{array}{c}\text{missioninformer}\end{array}$};&
\node [DataInter] (mission_Inf-st_interpol) {$\begin{array}{c}$$LoD, AoA, TSFC$$\end{array}$};&
\node [DataInter] (mission_Inf-grad_interpol) {$\begin{array}{c}\frac{LoD}{dp}, \frac{d\alpha}{dp}, \frac{dTSFC}{dp}\end{array}$};&
&
&
&
\\
%Row 2
&
\node [Function] (st_interpol) {$\begin{array}{c}\text{state intp. model:} = \tilde{S}\end{array}$};&
&
\node [DataInter] (st_interpol-st_fuel_burn) {$\begin{array}{c} \tilde{S}\end{array}$};&
\node [DataInter] (st_interpol-grad_fuel_burn) {$\begin{array}{c} \tilde{S}\end{array}$};&
&
\\
%Row 3
&
&
\node [Function] (grad_interpol) {$\begin{array}{c}\text{grad intp. model:} = \tilde{G}\end{array}$};&
&
\node [DataInter] (grad_interpol-grad_fuel_burn) {$\begin{array}{c}\tilde{G}\end{array}$};&
&
\\
%Row 4
&
&
&
\node [ImplicitFunction] (st_fuel_burn) {$\begin{array}{c}\text{fuel burn state} \\ \text{equation}\end{array}$};&
&
&
\node [DataIO] (right_output_st_fuel_burn) {$\begin{array}{c}\text{state fuel burnt}\end{array}$};\\
%Row 5
&
&
&
&
\node [ImplicitFunction] (grad_fuel_burn) {$\begin{array}{c}\text{fuel burn gradient} \\ \text{equation}\end{array}$};&
&
\node [DataIO] (right_output_grad_fuel_burn) {$\begin{array}{c}\text{gradients fuel burnt}\end{array}$};\\
%Row 6
&
&
&
&
&
&
\\
};

% XDSM process chains


\begin{pgfonlayer}{data}
\path
% Horizontal edges
(mission_Inf) edge [DataLine] (mission_Inf-st_interpol)
(mission_Inf) edge [DataLine] (mission_Inf-grad_interpol)
(st_interpol) edge [DataLine] (st_interpol-st_fuel_burn)
(st_interpol) edge [DataLine] (st_interpol-grad_fuel_burn)
(grad_interpol) edge [DataLine] (grad_interpol-grad_fuel_burn)
(st_fuel_burn) edge [DataLine] (right_output_st_fuel_burn)
(grad_fuel_burn) edge [DataLine] (right_output_grad_fuel_burn)
% Vertical edges
(mission_Inf-st_interpol) edge [DataLine] (st_interpol)
(mission_Inf-grad_interpol) edge [DataLine] (grad_interpol)
(st_interpol-st_fuel_burn) edge [DataLine] (st_fuel_burn)
(st_interpol-grad_fuel_burn) edge [DataLine] (grad_fuel_burn)
(grad_interpol-grad_fuel_burn) edge [DataLine] (grad_fuel_burn)
(mission_Inf) edge [DataLine] (output_mission_Inf);
\end{pgfonlayer}

\end{tikzpicture}