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/***********************************************/
/**
* @file gravityfield2PotentialCoefficientsTimeSeries.cpp
*
* @brief Time series of potential coefficients.
*
* @author Torsten Mayer-Guerr
* @date 2020-10-02
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
This program computes a \configClass{timeSeries}{timeSeriesType}
of a time variable \configClass{gravityfield}{gravityfieldType}
and converts to coefficients of a spherical harmonics expansion.
The expansion is limited in the range between \config{minDegree}
and \config{maxDegree} inclusivly.
The coefficients are related to the reference radius~\config{R}
and the Earth gravitational constant \config{GM}.
The \configFile{outputfileTimeSeries}{instrument} contains the potential coefficients
as data columns for each epoch in the sequence given by
\configClass{numbering}{sphericalHarmonicsNumberingType}.
)";
/***********************************************/
#include "programs/program.h"
#include "base/sphericalHarmonics.h"
#include "files/fileInstrument.h"
#include "classes/gravityfield/gravityfield.h"
#include "classes/timeSeries/timeSeries.h"
#include "classes/sphericalHarmonicsNumbering/sphericalHarmonicsNumbering.h"
/***** CLASS ***********************************/
/** @brief Time series of potential coefficients.
* @ingroup programsGroup */
class Gravityfield2PotentialCoefficientsTimeSeries
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(Gravityfield2PotentialCoefficientsTimeSeries, SINGLEPROCESS, "time series of potential coefficients", Gravityfield, TimeSeries)
/***********************************************/
void Gravityfield2PotentialCoefficientsTimeSeries::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName fileNameOut;
GravityfieldPtr gravityfield;
TimeSeriesPtr timeSeries;
UInt minDegree, maxDegree;
Double GM, R;
SphericalHarmonicsNumberingPtr numbering;
readConfig(config, "outputfileTimeSeries", fileNameOut, Config::MUSTSET, "", "instrument file (MISCVALUES)");
readConfig(config, "gravityfield", gravityfield, Config::MUSTSET, "", "");
readConfig(config, "timeSeries", timeSeries, Config::MUSTSET, "", "");
readConfig(config, "minDegree", minDegree, Config::MUSTSET, "0", "");
readConfig(config, "maxDegree", maxDegree, Config::MUSTSET, "", "");
readConfig(config, "GM", GM, Config::DEFAULT, STRING_DEFAULT_GM, "Geocentric gravitational constant");
readConfig(config, "R", R, Config::DEFAULT, STRING_DEFAULT_R, "reference radius");
readConfig(config, "numbering", numbering, Config::MUSTSET, "", "numbering scheme");
if(isCreateSchema(config)) return;
const std::vector<Time> times = timeSeries->times();
std::vector<std::vector<UInt>> idxC, idxS;
numbering->numbering(maxDegree, minDegree, idxC, idxS);
Matrix A(times.size(), 1+numbering->parameterCount(maxDegree, minDegree));
for(UInt idEpoch=0; idEpoch<times.size(); idEpoch++)
{
SphericalHarmonics harm = gravityfield->sphericalHarmonics(times.at(idEpoch), maxDegree, minDegree, GM, R);
for(UInt n=minDegree; n<=maxDegree; n++)
{
if(idxC[n][0]!=NULLINDEX) A(idEpoch, 1+idxC[n][0]) = harm.cnm()(n, 0);
for(UInt m=1; m<=n; m++)
{
if(idxC[n][m]!=NULLINDEX) A(idEpoch, 1+idxC[n][m]) = harm.cnm()(n, m);
if(idxS[n][m]!=NULLINDEX) A(idEpoch, 1+idxS[n][m]) = harm.snm()(n, m);
}
}
}
logStatus<<"write time series of potential coefficients to file <"<<fileNameOut<<">"<<Log::endl;
InstrumentFile::write(fileNameOut, Arc(times, A));
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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