Changeset 5604 in ntrip for trunk/BNC


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Timestamp:
Jan 22, 2014, 11:14:02 AM (8 years ago)
Author:
mervart
Message:
 
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1 edited

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  • trunk/BNC/txt/frankfurt.tex

    r5603 r5604  
    110110
    111111\begin{frame}
    112 \frametitle{}
     112\frametitle{O tempora! O mores!}
     113
     114\begin{itemize}
     115\item people want more and more \ldots
     116\item everybody wants everything immediately \ldots
     117\item \hspace*{2cm} and, of course, free of charge \ldots
     118\end{itemize}
     119\vspace*{5mm}
     120In GNSS-world it means:
     121\begin{itemize}
     122\item There are many new kinds of GNSS applications - positioning is becoming just one of many
     123  purposes of GNSS usage.
     124\item Many results of GNSS processing are required in real-time (or, at least, with very small
     125  delay).
     126\item GPS is not the only positioning system. Other GNSS are being established (for practical but
     127  also for political reasons).
     128\item People are used that many GNSS services are available free of charge (but the development and
     129  maintenance has to be funded).
     130\end{itemize}
     131
     132\begin{block}{But \ldots}
     133\end{block}
    113134
    114135\end{frame}
     
    117138
    118139\begin{frame}
    119 \frametitle{}
     140\frametitle{Nihil novi sub sole}
     141
     142Each GNSS-application is based on processing code and/or phase observations that may be expressed
     143as
     144  \begin{eqnarray*}
     145  P^i & = & \varrho^i + c\;\delta - c\;\delta^i + T^i + I^i + b_P              \\
     146  L^i & = & \varrho^i + c\;\delta - c\;\delta^i + T^i - I^i + b^i
     147  \end{eqnarray*}
     148  where
     149  \begin{tabbing}
     150  $P^i$, $L^i$ ~~~~~~~ \= are the code and phase measurements, \\
     151  $\varrho^i$          \> is the travel distance between the satellite
     152                          and the receiver,                               \\
     153  $\delta$, $\delta^i$ \> are the receiver and satellite clock errors,    \\
     154  $I^i$                \> is the ionospheric delay,                       \\
     155  $T^i$                \> is the tropospheric delay,                      \\
     156  $b_P$                \> is the code bias, and                           \\
     157  $b^i$                \> is the phase bias (including initial
     158                          phase ambiguity).
     159  \end{tabbing}
     160
    120161
    121162\end{frame}
     
    124165
    125166\begin{frame}
    126 \frametitle{}
     167
     168Observation equations reveal what information can be gained from processing GNSS data:
     169\begin{itemize}
     170\item geometry (receiver positions, satellite orbits), and
     171\item state of atmosphere (both dispersive and non-dispersive part)
     172\end{itemize}
     173
     174The observation equations also show that, in principle, GNSS is an
     175\textcolor{blue!90}{interferometric} technique -- precise results are actually always relative.
     176
    127177
    128178\end{frame}
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