Changeset 1167 in Sophya for trunk/DocHFI_L2

Timestamp:

Aug 30, 2000, 11:50:47 PM (25 years ago)

Author:

ansari

Message:

Correction erreurs commit - Reza 30/8/2000

File:

• trunk/DocHFI_L2/wbsl2.tex (modified) (10 diffs)

trunk/DocHFI_L2/wbsl2.tex

@@ -14 +14 @@
 
 %  Extension de symboles mathematiques
-\usepackage{amssymb}
+% \usepackage{amssymb}
 \usepackage{amsmath}
 
@@ -27 +27 @@
 \newcommand{\bbold}{\boldsymbol{b}}
 \newcommand{\dbold}{\boldsymbol{d}}
-%\newcommand{\bnu}{\nu}
-%\newcommand{\dbold}{d}
-%\newcommand{\bbold}{b}
 
 \begin{document}
@@ -50 +47 @@
 }
 
-\titlepfd{PL-HFI-LAL-PW-L2001}{2.0}
+\titlepfd{PL-HFI-LAL-PW-L2002}{1.2}
 
 \end{titlepage}
@@ -61 +58 @@
 \item Version 1.1 (April 2000 - CVS version 1.2) \\
 Draft updated using the document prepared at ISCTM and IfA (Edinburgh)
-\item Version 2.0 (August 2000 - CVS version 1.3) \\
+\item Version 1.2 (August 2000 - CVS version 1.4) \\
 Inclusion of a section describing notation and conventions, 
 flow charts. A more detailed description of deliverables is also included.
@@ -81 +78 @@
 POSDAC will run the Level 2 data processing pipeline and have overall 
 responsibility for the collaborative work involved in its 
-design and implementation. LPAC will a major role for in the 
+design and implementation. LPAC will a play major role for in the 
 activities that iterate and overlap between Level 2 
 and Level 3 (for which the Cambridge Planck Analysis Centre, 
-CPAC, plays the role analogous to POSDAC at Level 2)
+CPAC, plays the role analogous to POSDAC at Level 2).
+IPAC (at Caltech) and Canada (?) are the two other major
+laboratories involved in the development of HFI level 2
+software.
 
 \section{HFI L2 processing software packages}
@@ -96 +96 @@
 \item[]\gph{422}  TOI processing
 \item[]\gph{423}  Polarised TOI processing
-\item[]\gph{424}  Basic 2-D map reconstruction from TOI's
-\item[]\gph{425}  Optimal 2-D map reconstruction
-\item[]\gph{426}  Optimal 2-D polarised map reconstruction
+\item[]\gph{424}  2-D map reconstruction from TOI's
+\item[]\gph{425}  Polarised 2-D map reconstruction from TOI's
+\item[]\gph{426}  Optimal 2-D map reconstruction and analysis
 \item[]\gph{427}  Early Compact Source Catalogue
 \item[]\gph{428}  General software architecture and support modules
@@ -104 +104 @@
 \end{itemize}
 
-The package \gph424 should provide a resonably fast and simple 
+The package \gph{424} should provide a resonably fast and simple 
 method for reconstructing 2-D maps from cleaned TOI's (from 
-\gph422 and \gph423), removing systematic effects (destriping) 
+\gph{422} and \gph{423}), removing systematic effects (destriping) 
 and deconvolving the antenna beam pattern. An iterative method 
 is foreseen, capable of dealing with partial knowledge of 
-instrument caracteristics.
-The optimal 2-D map reconstruction packages (\gph425 and \gph426)
+instrument caracteristics. \gph{425} would contain the 
+complementary functionalities needed for reconstructing 
+polarisation maps, using data from polarised channels. 
+The optimal 2-D map reconstruction packages (\gph{426})
 will implement the best feasible method for analysing the whole
 data set from the HFI instrument and building the full sky frequency 
 maps.
+
+\par
+In addition to the specific Level 2 workpackages, the following items
+are also related to the L2 data processing:
 
 \begin{itemize}
@@ -135 +141 @@
 \ngph{421}     &   5     &     \ngph{426}     &   ?     \\
 %
-\ngph{422}     &   15    &     \ngph{427}     &   5     \\
+\ngph{422}     &   15    &     \ngph{427}     &   10     \\
 %
-\ngph{423}     &   15    &     \ngph{428}     &   30    \\
+\ngph{423}     &   10    &     \ngph{428}     &   30    \\
 %
-\ngph{424}     &   20    &     \ngph{429}     &   10    \\
+\ngph{424}     &   15    &     \ngph{429}     &   10    \\
 %
-\ngph{425}     &   ?     &                    &         \\
+\ngph{425}     &   10    &                    &         \\
 %               &           &           &       \\
 %
@@ -148 +154 @@
 \ngph{360}     &   2     & \ngph{180}     &   1     \\
 \hline \hline
-\multicolumn{2}{c}{\bf Total}          &   \multicolumn{2}{c}{\bf 110 + ?} \\
+\multicolumn{2}{c}{\bf Total}          &   \multicolumn{2}{c}{\bf 115 + ?} \\
 \hline 
 \end{tabular}
@@ -166 +172 @@
 \begin{itemize}
 \item[] {\bf Coordinates:} The spacecraft attitude is defined by the spin 
-axis direction $SA (\theta, \phi)$. $\psi$ is the third angle defining
-the position of the spacecraft and thus a given detectors view 
-direction and beam pattern orientation.
+axis direction $\overrightarrow{\Omega}(\theta, \phi)$. 
+$\psi$ is the third angle defining the position of the spacecraft 
+and thus a given detectors view direction and beam pattern orientation.
+The spin velocity would be denoted $\omega_z$ or $omega_{\psi}$. \\
 A given sky direction is denoted $(\alpha,\delta)$ in equatorial coordinates, 
 $(l,b)$ in Galactic coordinates or $(\lambda,\beta)$ in ecliptic coordinate.
+
 \item[] {\bf Detector:} A given HFI bolometer read-out channel. The corresponding
-signal is denoted $\dbold(t)$ or $\bbold(t)$ $\dbold^j(t)$ or $\bbold^j(t)$ where $j$ is the 
-bolometer number.
+signal is denoted $\dbold(t)$ or $\bbold(t)$ $\dbold^j(t)$ or $\bbold^j(t)$ 
+where $j$ is the bolometer number.
+
 \item[] {\bf Frequency channel:} The set of detectors working in the 
 same frequency range. This information is only obtained by combining 
 information from several detectors in the corresponding frequency band.
-The subscript $\bnu$ is used to denote a frequency channel. The sky map
-in a given frequency band would be written as $Sky  (\theta,\phi) \vert ^{\bnu}$.
-\item[] {\bf Scan:} The time interval corresponding to a nominal spin axis
-direction
-
-\end{itemize}
+The subscript $\bnu$ is used to denote a frequency channel. 
+
+\item[] {\bf Scan:} The time interval corresponding to a given nominal 
+spin axis direction
+
+\item[] {\bf Sky map:} The reconstructed signal in a given pixelisation 
+scheme from a single or a set of detectors. The sky map in a given 
+frequency channel is denoted $sky(\theta,\phi) \vert ^{\bnu}$.
+\end{itemize}
+
 
 \subsection{Processing steps}
+
+Unpacking the telemetry packets, uncompressing the science data,
+time ordering the data and archiving the data in a format usable 
+by the L2 pipeline is the responsability of Level 1. Detailed 
+description of L1 software and processing steps is beyond the scope
+of this document. {\bf DS0} denotes the complete data set used
+as input by level 1. {\bf DS0} contains the instrument 
+science and House-keeping (HSK) data telemetry packets, as well
+as the auxiliary data (orbit and attitude).
+{\bf DS1} is the processed data from level 1 containing the TOI's
+(Time Ordered Information).
+$$ \boldmath{L1} : \text{DS0} \longrightarrow \text{DS1} $$
+
+DS1 data set :
+\begin{itemize}
+\item Raw Time Ordered bolometer signals : $b_{raw}^j(t)$
+\item Time Ordered House-keeping data : $HSK(t)$
+\item Associated orbit and attitude data : 
+$XYZ(t) , \overrightarrow{\Omega}(t) , \psi(t)$ 
+(spin axis direction $(\theta, \phi)(t)$
+\end{itemize}
+
+{\bf DS0:} Science and House-keeping (HSK) telemetry packets \\
+{\bf DS1:} Time ordered - Uncompressed Science data bundeled 
+with the corresponding house-keeping data. \\
+{\bf DS2-2} Cleaned, photometrically calibrated Time ordered data \\