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/***********************************************/
/**
* @file gravityfield2GridCovarianceMatrix.cpp
*
* @brief Covariance matrix of values of a gravity field on a grid.
*
* @author Torsten Mayer-Guerr
* @date 2012-05-30
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
This program propagates the covariance matrix of a \configClass{gravityfield}{gravityfieldType}
evaluated at \config{time} to a \configClass{grid}{gridType}. The full variance-covariance matrix is computed
and written to a \file{matrix file}{matrix}:
\begin{equation}
\mathbf{\Sigma}_\mathbf{y} = \mathbf{F}\mathbf{\Sigma}_\mathbf{x}\mathbf{F}^T
\end{equation}
The \configClass{kernel}{kernelType} determines the quantity of the grid values, for example,
\configClass{kernel:waterHeight}{kernelType:waterHeight}.
See also \program{GravityfieldCovariancesPropagation2GriddedData}, \program{GravityfieldVariancesPropagation2GriddedData}.
)";
/***********************************************/
#include "programs/program.h"
#include "files/fileMatrix.h"
#include "classes/grid/grid.h"
#include "classes/kernel/kernel.h"
#include "classes/gravityfield/gravityfield.h"
#include "misc/miscGriddedData.h"
/***** CLASS ***********************************/
/** @brief Covariance matrix of values of a gravity field on a grid.
* @ingroup programsGroup */
class Gravityfield2GridCovarianceMatrix
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(Gravityfield2GridCovarianceMatrix, SINGLEPROCESS, "Covariance matrix of values of a gravity field on a grid.", Gravityfield)
/***********************************************/
void Gravityfield2GridCovarianceMatrix::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName outName;
GridPtr grid;
GravityfieldPtr gravityfield;
KernelPtr kernel;
Time time;
readConfig(config, "outputfileMatrix", outName, Config::MUSTSET, "", "symmetric grid covariance matrix");
readConfig(config, "grid", grid, Config::MUSTSET, "", "");
readConfig(config, "kernel", kernel, Config::MUSTSET, "", "");
readConfig(config, "gravityfield", gravityfield, Config::MUSTSET, "", "");
readConfig(config, "time", time, Config::OPTIONAL, "", "at this time the gravity field will be evaluated");
if(isCreateSchema(config)) return;
// Fcreate covariance matrix
// ------------------
logStatus<<"create covariance matrix"<<Log::endl;
Matrix C = gravityfield->variance(time, grid->points(), *kernel);
// write file
// ----------
logStatus<<"write covariance matrix to file <"<<outName<<">"<<Log::endl;
writeFileMatrix(outName, C);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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