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/***********************************************/
/**
* @file gravityfieldFromParametrization.cpp
*
* @brief Gravity field from parameter vector.
* @see Gravityfield
* @see ParametrizationGravity
*
* @author Torsten Mayer-Guerr
* @date 2003-10-31
*
*/
/***********************************************/
#include "base/import.h"
#include "base/sphericalHarmonics.h"
#include "config/config.h"
#include "files/fileMatrix.h"
#include "classes/kernel/kernel.h"
#include "classes/parametrizationGravity/parametrizationGravity.h"
#include "classes/gravityfield/gravityfield.h"
#include "classes/gravityfield/gravityfieldFromParametrization.h"
/***********************************************/
GravityfieldFromParametrization::GravityfieldFromParametrization(Config &config)
{
try
{
UInt rightSide, indexStart;
FileName xName, WName, sigmaxName;
renameDeprecatedConfig(config, "representation", "parametrization", date2time(2020, 6, 3));
readConfig(config, "parametrization", parametrization, Config::MUSTSET, "", "");
readConfig(config, "inputfileSolution", xName, Config::MUSTSET, "", "solution vector");
readConfig(config, "inputfileSigmax", sigmaxName, Config::OPTIONAL, "", "standards deviations or covariance matrix of the solution");
readConfig(config, "indexStart", indexStart, Config::DEFAULT, "0", "position in the solution vector");
readConfig(config, "rightSide", rightSide, Config::DEFAULT, "0", "if solution contains several right hand sides, select one");
readConfig(config, "factor", factor, Config::DEFAULT, "1.0", "the result is multiplied by this factor, set -1 to subtract the field");
if(isCreateSchema(config)) return;
Matrix mx;
readFileMatrix(xName, mx);
x = mx.slice(indexStart, rightSide, parametrization->parameterCount(), 1);
if(!sigmaxName.empty())
{
Matrix A;
readFileMatrix(sigmaxName, A);
if(A.getType() == Matrix::SYMMETRIC)
{
// full covariance matrix
C = A.slice(indexStart, indexStart, parametrization->parameterCount(), parametrization->parameterCount());
sigma2x = Vector(C.rows());
for(UInt i=0; i<sigma2x.rows(); i++)
sigma2x(i) = C(i,i);
}
else
{
// only diagonal matrix
sigma2x = A.row(indexStart, parametrization->parameterCount());
for(UInt i=0; i<sigma2x.rows(); i++)
sigma2x(i) *= sigma2x(i);
}
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
Double GravityfieldFromParametrization::potential(const Time &time, const Vector3d &point) const
{
Matrix A(1, parametrization->parameterCount());
parametrization->potential(time, point, A);
return factor * (A*x)(0,0);
}
/***********************************************/
Double GravityfieldFromParametrization::radialGradient(const Time &time, const Vector3d &point) const
{
Matrix A(1, parametrization->parameterCount());
parametrization->radialGradient(time, point, A);
return factor * (A*x)(0,0);
}
/***********************************************/
Double GravityfieldFromParametrization::field(const Time &time, const Vector3d &point, const Kernel &kernel) const
{
Matrix A(1, parametrization->parameterCount());
parametrization->field(time, point, kernel, A);
return factor * (A*x)(0,0);
}
/***********************************************/
Vector3d GravityfieldFromParametrization::gravity(const Time &time, const Vector3d &point) const
{
Matrix A(3, parametrization->parameterCount());
parametrization->gravity(time, point, A);
Vector l = A*x;
Vector3d field;
field.x() = l(0);
field.y() = l(1);
field.z() = l(2);
return factor * field;
}
/***********************************************/
Tensor3d GravityfieldFromParametrization::gravityGradient(const Time &time, const Vector3d &point) const
{
Matrix A(6, parametrization->parameterCount());
parametrization->gravityGradient(time, point, A);
Vector l = A*x;
Tensor3d field;
field.xx() = l(0);
field.xy() = l(1);
field.xz() = l(2);
field.yy() = l(3);
field.yz() = l(4);
field.zz() = l(5);
return factor * field;
}
/***********************************************/
Vector3d GravityfieldFromParametrization::deformation(const Time &time, const Vector3d &point, Double gravity, const Vector &hn, const Vector &ln) const
{
Matrix A(3, parametrization->parameterCount());
parametrization->deformation(time, point, gravity, hn, ln, A);
const Vector l = A*x;
return factor * Vector3d(l(0), l(1), l(2));
}
/***********************************************/
void GravityfieldFromParametrization::deformation(const std::vector<Time> &time, const std::vector<Vector3d> &point, const std::vector<Double> &gravity,
const Vector &hn, const Vector &ln, std::vector<std::vector<Vector3d>> &disp) const
{
try
{
for(UInt i=0; i<time.size(); i++)
for(UInt k=0; k<point.size(); k++)
disp.at(k).at(i) += deformation(time.at(i), point.at(k), gravity.at(k), hn, ln);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
void GravityfieldFromParametrization::variance(const Time &time, const std::vector<Vector3d> &point, const Kernel &kernel, Matrix &D) const
{
try
{
Matrix A(point.size(), parametrization->parameterCount());
for(UInt i=0; i<point.size(); i++)
parametrization->field(time, point.at(i), kernel, A.row(i));
if(C.size())
D += A*C*A.trans();
else
{
for(UInt i=0; i<A.columns(); i++)
A.column(i) *= sqrt(sigma2x(i));
rankKUpdate(1., A.trans(), D);
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
SphericalHarmonics GravityfieldFromParametrization::sphericalHarmonics(const Time &time, UInt maxDegree, UInt minDegree, Double GM, Double R) const
{
try
{
if(sigma2x.rows()!=0)
return factor * parametrization->sphericalHarmonics(time, x, sigma2x, maxDegree).get(maxDegree, minDegree, GM, R);
else
return factor * parametrization->sphericalHarmonics(time, x, maxDegree).get(maxDegree, minDegree, GM, R);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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