\documentclass[12pt,a4paper]{report}
\usepackage[top = 1in , left =1.5in, right=1in, bottom=1in]{geometry}
%\usepackage{newtxtext,mathptmx}
\usepackage{graphicx,float}
\usepackage[hidelinks]{hyperref}
\setlength{\parskip}{0.75em}
\usepackage{setspace}
\setstretch{1.5}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{amsmath,amssymb}
\DeclareMathOperator*{\argmin}{arg\,min}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{adjustbox}
\usepackage{breakcites}
\usepackage{pdfpages}
%\usepackage[english]{babel}
%\usepackage{subfig}
%\usepackage[backend=biber,style=authoryear,]{biblatex}
\usepackage{natbib}
\usepackage[tableposition=top]{caption}
\usepackage{subcaption}
%\usepackage{fancyhdr}
%\pagestyle{fancy}
\renewcommand\bibsection{%
    \chapter*{{\hfill \centering\hfill \Large \textbf{References}\hfill}}%

    \markboth{\MakeUppercase{\refname}}{\MakeUppercase{\refname}}%
}%

\usepackage{tocloft}
%%    Creating a 2 inch margin


%\renewcommand{\cftchappresnum}{Chapter \\}
%\AtBeginDocument{\addtolength\cftchapnumwidth{\widthof{\bfseries Chapter }}}
\renewcommand\cftlottitlefont{\large\bfseries}
\renewcommand\cfttabfont{\small}
\renewcommand\cfttabpagefont{\small}
\renewcommand{\cftdot}{} %empty {} for no dots. you can have any symbol inside. For example put {\ensuremath{\ast}} and see what happens.
% ------------------------------

\renewcommand{\contentsname}{\vspace*{-1.5cm}\hfill \Large Contents\hfill}
\renewcommand{\cftaftertoctitle}{\hfill}

\renewcommand{\listtablename}{\vspace*{-1cm}\hfill\bfseries\Large List of Tables} % no ending \hfill <<<<<<
\renewcommand{\cftafterlottitle}{\hfill}

\renewcommand{\listfigurename}{\vspace*{-1cm}\hfill\bfseries\Large List of Figures} % no ending \hfill <<<<<<
\renewcommand{\cftafterloftitle}{\hfill}
\makeatletter
%\let\stdl@chapter\l@chapter
%\renewcommand*{\l@chapter}[1]{\stdl@chapter{\hfill\underline{#1}}{}}
\makeatother
\setcounter{tocdepth}{2}

%% eventually the number of the next chapter
\newcounter{nextchap}

%% set nextchap to the number of the next chapter
\newcommand{\incchap}{\setcounter{nextchap}{\value{chapter}}\addtocounter{nextchap}{1}}

%% add centered Chapter number into the ToC
%\newcommand{\addchaptoc}{\addtocontents{toc}{%
        %    \vspace{\baselineskip}\centering \underline{\textbf{Chapter \Roman{nextchap}}}\par}

\usepackage{titlesec}
%\renewcommand{\thechapter}{\Roman{chapter}}
%\titleformat{\chapter}
%{\huge\bf\uppercase}{CHAPTER \thechapter}{0.5em}{}

\titleformat
{\chapter} % command
[display] % shape
{\bfseries\Large} % format
{\centering CHAPTER \thechapter} % label
{-2ex} % se\
{
    \rule{\textwidth}{0pt}
    \centering
} % before-code
[
\vspace{-8ex}%
\rule{\textwidth}{0pt}
] % after-code

\titlespacing{\chapter}{0pt}{-50pt}{40pt}
\titleformat{\section}[hang]{\bfseries\large\itshape}{\thesection}{0.5em}{}

\titleformat{\subsection}[hang]{\bfseries\itshape}{\thesubsection}{0.5em}{}


\renewcommand{\cftchappresnum}{\large CHAPTER }
\renewcommand{\cftchapaftersnumb}{\par}
\renewcommand{\cftfigpresnum}{Figure }
\renewcommand{\cftfigaftersnumb}{\qquad: \quad}
\renewcommand{\cfttabpresnum}{Table }
\renewcommand{\cfttabaftersnumb}{\qquad: \quad}
\usepackage[toc, nonumberlist, nopostdot, nogroupskip]{glossaries}
\makeglossaries
\setlength\LTleft{0pt}
\newacronym{OD}{OD}{Optical Depth}
\newacronym{AOD}{AOD}{Aerosol Optical Depth}
\newacronym{AERONET}{AERONET}{AErosol RObotic NETwork}
\newacronym{ISN}{ISN}{International Sunspot Number}
\newacronym{WSN}{WSN}{Wolf Sunspot Number}
\newacronym{CME}{CME}{Coronary Mass Ejections}
\newacronym{PWV}{PWV}{Precipitable Water Vapor}

%\renewcommand{\listfigurename}{\centering \Large \centering List of Figures}
%\renewcommand{\listtablename}{\centering \Large List of Tables}