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Timestamp:
Oct 20, 2006, 6:27:38 PM (20 years ago)
Author:
Paul Price
Message:

Fixing so it compiles. Removed photometric systems stuff.

File:
1 edited

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  • trunk/doc/modules/ModulesSDRS.tex

    r9689 r9713  
    1 %%% $Id: ModulesSDRS.tex,v 1.78 2006-10-21 00:58:33 price Exp $
     1%%% $Id: ModulesSDRS.tex,v 1.79 2006-10-21 04:27:38 price Exp $
    22\documentclass[panstarrs,spec]{panstarrs}
    33
     
    8787
    8888
    89 \subsubsection{Configuration information}
     89\subsection{Configuration information}
    9090
    9191This structure stores the configuration information: the site, camera
     
    134134\end{prototype}
    135135pmConfigRead loads the site configuration (the file name is specified
    136 by "-site SITE_FILE" on the command-line, the PS_SITE environment
    137 variable, or it is \code{$HOME/.ipprc}).  The configuration search %$
    138 path is set. The camera configuration is loaded if it is specified on
    139 the command line ("-camera CAMERA_FILE"). Recipes specified on the
    140 command line ("-recipe RECIPE_NAME RECIPE_SOURCE") are also loaded.
    141 These command-line arguments are removed from from the command-line,
    142 to simplify parsing.  The psLib log, trace and time setups are also
     136by "-site SITE\_FILE" on the command-line, the PS\_SITE environment variable, or
     137it is \code{$HOME/.ipprc}).  The configuration search %$ path is
     138set. The camera configuration is loaded if it is specified on the
     139command line ("-camera CAMERA\_FILE"). Recipes specified on the command
     140line ("-recipe RECIPE\_NAME RECIPE\_SOURCE") are also loaded.  These
     141command-line arguments are removed from from the command-line, to
     142simplify parsing.  The psLib log, trace and time setups are also
    143143performed if specified in the site configuration.
    144144
     
    617617%\input{CameraGeometry.tex}
    618618
    619 \section{Photometry}
    620 
    621 \tbd{This section is to be deferred, and for now consists only of
    622 place holders, with no functional items.}
    623 
    624 Photometric observations are performed in an instrumental photometric
    625 system, and must be related to other photometric systems.  We
    626 require a data structure which defines a photometric system, as well
    627 as a structure to define the transformation between photometric
    628 systems.
    629 
    630 The photometric system is defined by the psPhotSystem structure. 
    631 A photometric system is identified by a human-readable \code{name}
    632 (ie, SDSS.g, Landolt92.B, GPC1.OTA32.r).  Each photometric system is
    633 given a unique identifier \code{ID}.  Observations taken with a
    634 specific camera, detector, and filter represent their own photometric
    635 system, and it may be necessary to perform transformations between
    636 these systems.  Photometric systems associated with observations from
    637 a specific camera/detector/filter combination can be associated with
    638 those components.
    639 \begin{datatype}
    640 typedef struct {
    641     const int ID;                       ///< ID number for this photometric system
    642     const char *name;                   ///< Name of photometric system
    643     const char *camera;                 ///< Camera for photometric system
    644     const char *filter;                 ///< Filter used for photometric system
    645     const char *detector;               ///< Detector used for photometric system
    646 } psPhotSystem;
    647 \end{datatype}
    648 
    649 The following structure defines the transformation between two
    650 photometric systems.
    651 \begin{datatype}
    652 typedef struct {
    653     psPhotSystem src;                   ///< Source photometric system
    654     psPhotSystem dst;                   ///< Destination photometric system
    655     psPhotSystem pP, pM;                ///< Primary color reference
    656     psPhotSystem sP, sM;                ///< Secondary color reference
    657     float pA, sA;                       ///< Color offset for references
    658     psPolynomial3D transform;           ///< Transformation from source to destination
    659 } psPhotTransform;
    660 \end{datatype}
    661 
    662 The transformation between two photometric systems may depend on the
    663 airmass of the observation and on the colors of the object of
    664 interest.  For a specific observation, such a transformations can be
    665 defined as a polynomial function of the color of the star and the
    666 airmass of the observations.  If sufficient data exists, the
    667 transformation between the photometric systems may include more than
    668 one color, constraining the curvature of the stellar spectral energy
    669 distributions.  This latter term may be significant for stars which
    670 are highly reddened, for example.  Derived photometric quantities may
    671 have been corrected for airmass variations, in which case only color
    672 terms may be measurable.  The structure defines the transformation
    673 between a source photometric system (\code{src}) and a target
    674 photometric system (\code{dst}).  The photometric system of a primary
    675 color is defined by \code{pP, pM} such that the color is constructed
    676 as $pP - pM$.  A secondary color is defined by \code{sP, sM}.  For
    677 both, a reference color is specified (\code{pA, sA}): the polynomial
    678 transformation terms refer to colors in the form $pP - pM - pA$.  The
    679 transformation is specified as a 3D polynomial.  For a star of
    680 magnitude $M_{\rm src}$ in the source photometric system, with
    681 additional magnitude information in the other systems $M_{\rm pP}$,
    682 $M_{\rm pM}$, $M_{\rm sP}$, $M_{\rm sM}$, observed at an airmass of
    683 $z$, the magnitude of the star in the target system $M_{\rm dst}$ is
    684 given by: $M_{\rm dst} = M_{\rm src} + transform(z, M_{\rm pP} -
    685 M_{\rm pM} - pA, M_{\rm sP} - M_{\rm sM} - sA)$.
     619
     620%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    686621
    687622\section{Image Detrending}
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