Solvers, ground stations, mas
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@ -4,7 +4,10 @@ for download in the Releases section of the source code archive:
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* https://spacecruft.org/spacecruft/SNOUG/releases
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To build the PDF from the LaTeX source code, see the `BUILD.md` document.
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# Build from Source
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To build the PDF documentation from the LaTeX source code,
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see the `BUILD.md` document.
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# License
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2
TODO.md
2
TODO.md
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@ -5,4 +5,6 @@
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* Lists/tables in boxes (?).
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* Better tables.
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* See also for acronyms, index, glossary.
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* Using ps2pdf to resize PDF for web breaks internal links.
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* Content.
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* Tracking.
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@ -211,3 +211,12 @@
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% CCD
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% photon
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% giza (pgplot?)
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% orbit
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% decay
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% libre
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% astrometry.net
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% astap
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% Source Extractor
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% Watney
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% WCS
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% PiCamera
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@ -31,12 +31,25 @@ It shows a \gls{SatNOGS} \gls{ground-station} with \gls{VHF} (right) and \gls{UH
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\begin{figure}[h!]
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\begin{center}
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\includegraphics[keepaspectratio=true,height=0.40\textheight,width=1.00\textwidth,angle=0]{spacecruft-rotator.png}
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\caption{SatNOGS Ground Station with antennas.}
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\caption{SatNOGS ground station with antennas.}
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\label{fig:spacecruft-rotator}
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\index{radio}\index{RF}\index{rotator}\index{antenna}\index{ground-station}
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\end{center}
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\end{figure}
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Ground stations can be viewed on the SatNOGS network website, such as
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XXX ref.
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%https://network.satnogs.org/stations/2733/
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\begin{figure}[h!]
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\begin{center}
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\includegraphics[keepaspectratio=true,height=0.40\textheight,width=1.00\textwidth,angle=0]{satnogs-ground-station-web.png}
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\caption{Ground station viewed on SatNOGS website, example.}
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\label{fig:satnogs-ground-station-web}
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\index{ground-station}
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\end{center}
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\end{figure}
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\section{SatNOGS Optical Ground Stations}
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\index{ground station}\index{Libre Space Foundation}
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@ -49,6 +49,7 @@ Cameras being tested:
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\item The Imaging Source IMX174 based. \index{The Imaging Source}\index{IMX174}
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\item ZWO ASI IMX174 based monochrome. \index{ZWO ASI}
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\item \gls{DSLR} camera. \index{DSLR}
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\item PiCamera. \index{PiCamera}
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\end{itemize}
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\fbox{
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@ -22,15 +22,20 @@ The SatNOGS Optical Unofficial Guide documents how to set up and run an
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\section{Unofficial Guide Overview}
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First, an overview of the this text, then the \gls{LSF},
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some of it's key projects, such as the \gls{SatNOGS} network.
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First, an overview of the this text, then the \gls{LSF}
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and some of it's key projects, such as the \gls{SatNOGS} network.
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A cursory review of satellites and existing \gls{RF} ground stations
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will be followed by a big picture view of acquiring and processing
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images of satellites. Hardware is reviewed, then software to run
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on it, with many options, including what is best. Finally,
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what to do with the data (idk!).
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The chapters that follow are listed below.
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% Perhaps more LaTeXy ref XXX
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\begin{itemize}
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\item Satellites --- What are we looking at?
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\item Ground Stations --- How Earth talks to satellites and back.
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\item SatNOGS Optical Process Overview --- The big picture of what
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\item Toolchain and Process --- The big picture of what
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hardware and software is needed to set up an optical ground station
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for use on the distributed network.
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\item Hardware --- Details on appropriate hardware configurations,
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@ -334,9 +334,9 @@ leftmargin=1cm,rightmargin=1cm
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% Comment out a line to not render that chapter
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\chapterconf{Satellites}{Satellites}{Artificial Satellites in Space}
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\chapterconf{Ground_Stations}{Ground Stations}{Looking up from Earth}
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\chapterconf{SatNOGS_Optical}{SatNOGS Optical Process Overview}{Network of Optical Ground Stations for Satellites}
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\chapterconf{SatNOGS_Optical}{Toolchain and Process}{Make Old Photons Useful Again}
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\chapterconf{Hardware}{Hardware}{Design and Set Up Equipment}
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\chapterconf{Software}{Software}{Satellite Software}
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\chapterconf{Software}{Software}{Satellite Applications on Earth}
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\chapterconf{Acquire}{Acquire}{Twinkle, Twinkle, Little Starlink}
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\chapterconf{Solve}{Solve}{Place from Pixels}
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\chapterconf{Detect}{Detect}{Find Satellites}
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@ -12,6 +12,80 @@
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\section{Plate Solver}
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\label{sec:plate-solver}
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\index{plate solver}
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A ``plate solver'' will take an image of stars and detect the time and place
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of the picture. There are two main steps:
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Description of plate solvers to follow.
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\begin{enumerate}
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\item Extract stars from an image, such as a \gls{FITS} file generated by \texttt{stvid}.
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\item ``Solve'' the image of the stars in the image against vast databases of star images.
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\end{enumerate}
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See below for a list of software tools that detect/extract stars from
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images (e.g. \gls{FITS}).
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\begin{itemize}
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\item Source Extractor.
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\item XXX Kstars with ekos adds \texttt{Internal SEP}.
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\item XXX Kstars with ekos adds \texttt{Builtin method for solver}.
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\end{itemize}
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\index{Souce Extractor}\index{Kstars}\index{ekos}
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See below for a list of plate solvers than can be used.
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\begin{itemize}
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\item astrometry.net locally.
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\item astrometry.net Internet.
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\item astap.
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\item Watney.
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\end{itemize}
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\index{astrometry.net}\index{astap}\index{Watney}
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\section{Source Extractor}
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\index{Source Extractor}
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\texttt{Source Extractor}, formerly \texttt{SExtractor} and some other names,
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is an application to extract stars from images. The software has been
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widely used for many years.
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\url{https://www.astromatic.net/software/sextractor}
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\section{astrometry.net}
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\index{astrometry.net}
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Astrometry.net is a website and software that can be run locally to solve
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a plate of stars that has been extracted from \texttt{Source Extractor}. XXX
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\index{Source Extractor}
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% https://nova.astrometry.net/
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\begin{figure}[h!]
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\includegraphics[keepaspectratio=true,height=1.10\textheight,width=1.00\textwidth,angle=0]{astrometry-web.png}
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\caption{nova.astrometry.net website.}
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\label{fig:astrometry-web-web}
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\index{astrometry.net}
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\end{figure}
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\fbox{
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\parbox{\linewidth}{
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\textcolor{red}{NOTICE:} \\
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Using astrometry.net online requires an account with non-libre services.
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The astrometry.net software can be installed locally to avoid this.
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\index{proprietary}
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}
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}
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\section{Star Databases}
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\index{star database}
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To use a plate solver, you will need star databases. They can get large.
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The \texttt{stvid} application includes a basic star database.
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XXX The \texttt{4200} series is also recommended.
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\section{World Coordinate System}
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WCS info. XXX
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\section{Plate Solving with \texttt{stvid}}
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Use the \texttt{process.py} scripts described at XXX to solve plates
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with \texttt{stvid}.
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