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% Ground_Stations.tex
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% SatNOGS Optical Unofficial Guide
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% Copyright (C) 2022, Jeff Moe
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% This document is licensed under the Creative Commons Attribution 4.0
% International Public License (CC BY-SA 4.0) by Jeff Moe.
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\section{Overview of Ground Stations}
\label{sec:overview-groundstations}
\index{ground station}
\Glspl{ground-station} are a setup of equipment such as computers, cameras,
\glspl{SDR}, antennas, and receivers, located on Earth, observing space.


\section{SatNOGS Ground Stations}
\index{ground station}\index{Libre Space Foundation}
The \gls{LSF} built the \gls{SatNOGS} network using distributed,
volunteer-run, \gls{RF} \glspl{ground-station} using \glspl{SDR}, such as in
figure \ref{fig:spacecruft-rotator}, page \pageref{fig:spacecruft-rotator}.%
\footnote{\url{https://spacecruft.org/assets/i/spacecruft-rotator.png}}
It shows a \gls{SatNOGS} \gls{ground-station} with \gls{VHF} (right) and \gls{UHF} (left)
\glspl{antenna} on a \gls{mast} with an \gls{Alt-Az} \gls{rotator}.
\glspl{SDR} can be used as \gls{RF} receivers.%
\footnote{\cite{Wiki22:softwdefinradiowikipfreeencyc}}
\index{radio}\index{SDR}\index{RF}\index{VHF}\index{UHF}\index{rotator}\index{antenna}

\begin{figure}[h!]
	\begin{center}
		\includegraphics[keepaspectratio=true,height=0.40\textheight,width=1.00\textwidth,angle=0]{spacecruft-rotator.png}
		\caption{SatNOGS ground station with antennas.}
		\label{fig:spacecruft-rotator}
		\index{radio}\index{RF}\index{rotator}\index{antenna}\index{ground-station}
	\end{center}
\end{figure}

Ground stations can be viewed on the SatNOGS network website, such as
XXX ref.

%https://network.satnogs.org/stations/2733/
\begin{figure}[h!]
	\begin{center}
		\includegraphics[keepaspectratio=true,height=0.40\textheight,width=1.00\textwidth,angle=0]{satnogs-ground-station-web.png}
		\caption{Ground station viewed on SatNOGS website, example.}
		\label{fig:satnogs-ground-station-web}
		\index{ground-station}
	\end{center}
\end{figure}


\section{SatNOGS Optical Ground Stations}
\index{ground station}\index{Libre Space Foundation}
The \gls{LSF} is developing \gls{SatNOGS-Optical} to add
\glspl{optical-ground-station} to the distributed network.

Prototype \glspl{optical-ground-station} are being developed. An example
setup, using a Skywatcher EQ6-R Pro telescope tripod and tracking mount,
\index{Skywatcher}\index{telescope}\index{tripod}\index{mount}\index{enclosure}
can be seen in Figure
\ref{fig:video-enclosure-mount-tripod}, page \pageref{fig:video-enclosure-mount-tripod}.

\begin{figure}[h!]
	\begin{center}
		\includegraphics[keepaspectratio=true,height=0.40\textheight,width=1.00\textwidth,angle=0]{video-enclosure-mount-tripod-web.png}
		\caption{SatNOGS-Optical ground station prototype.}
		\label{fig:video-enclosure-mount-tripod}
		\index{telescope}\index{tripod}\index{mount}\index{enclosure}
	\end{center}
\end{figure}