Changeset 5601 in ntrip for trunk/BNC/txt/frankfurt.tex


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Timestamp:
Jan 22, 2014, 9:59:38 AM (8 years ago)
Author:
mervart
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  • trunk/BNC/txt/frankfurt.tex

    r5599 r5601  
    3131\newcommand{\nl}{\\[4mm]}
    3232
    33 \title{GNSS-Auswertung in Echtzeit}
     33\title{Processing GNSS Data in Real-Time}
    3434
    3535\author{Leo\v{s} Mervart}
    3636
    37 \institute{TU Prag}
     37\institute{TU Prague}
    3838
    39 \date{Frankfurt, Januar 2014}
     39\date{Frankfurt, January 2014}
    4040
    4141% \AtBeginSection[]
     
    5858
    5959\begin{frame}
    60   \frametitle{Table of Contents}
    61   \tableofcontents
     60\frametitle{Medieval Times of GNSS (personal memories)}
     61
     62\begin{description}
     63\item[1991] Prof. Gerhard Beutler became the director of the Astronomical Institute, University of
     64  Berne. The so-called Bernese GPS Software started to be used for (post-processing) analyzes of
     65  GNSS data.
     66\item[1992] LM started his PhD study at AIUB.
     67\item[1992] Center for Orbit Determination in Europe (consortium of AIUB, Swisstopo, BKG, IGN, and
     68  IAPG/TUM) established. Roughly at that time LM met Dr. Georg Weber for the first time.
     69\item[1993] International GPS Service formally recognized by the IAG.
     70\item[1994] IGS began providing GPS orbits and other products routinely (January, 1).
     71\item[1995] GPS declared fully operational.
     72\end{description}
     73
    6274\end{frame}
    6375
    6476%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    6577
    66 \section{PPP NB}
    67 \subsection{Principles}
     78\begin{frame}
     79\frametitle{CODE-Related Works in 1990's}
    6880
    69 \begin{frame}
    70 \frametitle{Principles of PPP NB (Non-Bias) Service}
    71 \framesubtitle{Observation Equations}
     81\begin{itemize}
     82\item The Bernese GPS Software was the primary tool for CODE analyzes (Fortran~77).
     83\item IGS reference network was sparse.
     84\item Real-time data transmission limited (Internet was still young, TCP/IP widely accepted 1989).
     85\item CPU power of then computers was limited (VAX/VMS OS used at AIUB).
     86\end{itemize}
    7287
    73 The PPP~NB is based on the processing of the ionosphere-free linear combination of phase
    74 observations
    75 \be
    76 L^{ij}_3 = \varrho^{ij} - c\delta^{ij} + T^{ij} + \bar{N}^{ij}_3 ~,
    77 \ee
    78 where the ambiguity term is given by
    79 \be
    80 \bar{N}^{ij}_3 =  N^{ij}_3 - l^{ij}_3
    81               = \frac{c\;f_2}{f^2_1-f^2_2}\;(n^{ij}_1-n^{ij}_2) + \lambda_3\;n^{ij}_1 - l^{ij}_3
    82 \ee
    83 and the ionosphere-free linear combination of code observations
    84 \be
    85 P^{ij}_3 = \varrho^{ij} - c\delta^{ij} + T^{ij} + p^{ij}_3 ~,
    86 \ee
    87 where the code bias $p^{ij}_3$ is the linear combination of biases
    88 $p^{ij}_1,p^{ij}_2$
     88In 1990's high precision GPS analyzes were almost exclusively performed in post-processing mode.
     89The typical precise application of GPS at that time was the processing of a network of static
     90GPS-only receivers for the estimation of station coordinates.
     91
    8992\end{frame}
    9093
    9194%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    9295
     96\begin{frame}
     97\frametitle{Tempora mutantur (and maybe ``nos mutamur in illis'')}
     98
     99\end{frame}
     100
     101
     102%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     103
     104\begin{frame}
     105\frametitle{}
     106
     107\end{frame}
     108
     109%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     110
     111\begin{frame}
     112\frametitle{}
     113
     114\end{frame}
     115
     116%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     117
     118\begin{frame}
     119\frametitle{}
     120
     121\end{frame}
     122
    93123\end{document}
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