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/***********************************************/
/**
* @file potentialCoefficients2BlockMeanTimeSplines.cpp
*
* @brief Write monthly potential coeffcients into one time spline file.
*
* @author Torsten Mayer-Guerr
* @date 2008-08-08
*
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
This program is a simplified version of \program{Gravityfield2TimeSplines}.
It reads a series of potential coefficient files (\configFile{inputfilePotentialCoefficients}{potentialCoefficients})
and creates a time splines file with spline degree 0 (temporal block means) or degree 1 (linear splines).
The time intervals in which the potential coefficients are valid are defined between adjacent
points in time given by \config{splineTimeSeries}. Therefore one more point in time is needed
than the number of potential coefficient files for degree 0.
The coefficients can be filtered with \configClass{filter}{sphericalHarmonicsFilterType}.
If set 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}.
This program is useful e.g. to combine monthly GRACE solutions to one file.
)";
/***********************************************/
#include "programs/program.h"
#include "base/sphericalHarmonics.h"
#include "files/fileSphericalHarmonics.h"
#include "files/fileTimeSplinesGravityfield.h"
#include "classes/timeSeries/timeSeries.h"
#include "classes/sphericalHarmonicsFilter/sphericalHarmonicsFilter.h"
/***** CLASS ***********************************/
/** @brief Write monthly potential coeffcients into one time spline file.
* @ingroup programsGroup */
class PotentialCoefficients2BlockMeanTimeSplines
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(PotentialCoefficients2BlockMeanTimeSplines, SINGLEPROCESS, "write monthly potential coeffcients into one time spline file", Misc, PotentialCoefficients, TimeSplines)
/***********************************************/
void PotentialCoefficients2BlockMeanTimeSplines::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName outputName, covName;
std::vector<FileName> inputName;
TimeSeriesPtr timeSeries;
SphericalHarmonicsFilterPtr filter;
UInt minDegree, maxDegree = INFINITYDEGREE;
Double GM, R;
Bool removeMean;
Bool interpolate;
UInt splineDegree;
readConfig(config, "outputfileTimeSplines", outputName, Config::MUSTSET, "", "");
readConfig(config, "outputfileTimeSplinesCovariance", covName, Config::OPTIONAL, "", "only the variances are saved");
readConfig(config, "inputfilePotentialCoefficients", inputName, Config::MUSTSET, "{groopsDataDir}/potential/", "");
readConfig(config, "filter", filter, Config::DEFAULT, "", "");
readConfig(config, "minDegree", minDegree, Config::DEFAULT, "0", "");
readConfig(config, "maxDegree", maxDegree, Config::OPTIONAL, "", "");
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, "removeMean", removeMean, Config::DEFAULT, "0", "remove the temporal mean of the series before estimating the splines");
readConfig(config, "interpolate", interpolate, Config::DEFAULT, "0", "interpolate missing files");
readConfig(config, "splineTimeSeries", timeSeries, Config::MUSTSET, "", "input files must be between points in time");
readConfig(config, "splineDegree", splineDegree, Config::DEFAULT, "0", "degree of splines");
if(isCreateSchema(config)) return;
std::vector<Time> times = timeSeries->times();
const UInt timeCount = times.size();
const UInt fileCount = inputName.size();
if(timeCount-1+splineDegree != fileCount)
throw(Exception("fileCount("+fileCount%"%i) != timeCount("s+timeCount%"%i)-1+splineDegree"s));
// read data
// ---------
logStatus<<"read potential coefficients from files"<<Log::endl;
std::vector<Matrix> cnmList(fileCount), snmList(fileCount);
std::vector<Matrix> sigma2List(fileCount);
std::vector<Bool> isZero(fileCount, FALSE);
Single::forEach(fileCount, [&](UInt i)
{
SphericalHarmonics harm;
try
{
readFileSphericalHarmonics(inputName.at(i), harm);
harm = filter->filter(harm);
}
catch(std::exception &e)
{
logError<<e.what()<<": continue..."<<Log::endl;
harm = SphericalHarmonics();
isZero.at(i) = TRUE;
}
harm = harm.get(maxDegree, minDegree, GM, R);
maxDegree = harm.maxDegree();
GM = harm.GM();
R = harm.R();
cnmList.at(i) = harm.cnm();
snmList.at(i) = harm.snm();
sigma2List.at(i) = harm.sigma2x();
});
// interpolate missing data
// ------------------------
if(interpolate)
{
logStatus<<"interpolate missing data"<<Log::endl;
UInt idxStart = NULLINDEX;
for(UInt i=0; i<fileCount; i++)
{
if(!isZero.at(i))
idxStart = i;
else
{
UInt idxEnd = NULLINDEX;
for(UInt k=i+1; k<fileCount; k++)
if(!isZero.at(k))
{
idxEnd = k;
break;
}
if((idxStart==NULLINDEX)||(idxEnd==NULLINDEX))
throw(Exception("Cannot interpolate data at begin or end"));
Double tau = static_cast<Double>(i-idxStart)/(idxEnd-idxStart);
cnmList.at(i) = (1-tau) * cnmList.at(idxStart) + tau * cnmList.at(idxEnd);
snmList.at(i) = (1-tau) * snmList.at(idxStart) + tau * snmList.at(idxEnd);
sigma2List.at(i) = (1-tau) * sigma2List.at(idxStart) + tau * sigma2List.at(idxEnd);
}
}
}
// remove mean
// -----------
if(removeMean)
{
logStatus<<"remove mean"<<Log::endl;
UInt count = 0;
for(UInt i=0; i<fileCount; i++)
if(!isZero.at(i))
count++;
Matrix cnmMean = cnmList.at(0);
for(UInt i=1; i<fileCount; i++)
if(!isZero.at(i))
cnmMean += cnmList.at(i);
cnmMean *= 1./count;
for(UInt i=0; i<fileCount; i++)
if(interpolate || !isZero.at(i))
cnmList.at(i) -= cnmMean;
Matrix snmMean = snmList.at(0);
for(UInt i=1; i<fileCount; i++)
if(!isZero.at(i))
snmMean += snmList.at(i);
snmMean *= 1./count;
for(UInt i=0; i<fileCount; i++)
if(interpolate || !isZero.at(i))
snmList.at(i) -= snmMean;
}
// write timeSplines file
// ----------------------
if(!outputName.empty())
{
logStatus<<"write time splines to file <"<<outputName<<">"<<Log::endl;
writeFileTimeSplinesGravityfield(outputName, GM, R, splineDegree, times, cnmList, snmList);
}
if(!covName.empty())
{
logStatus<<"write covariance time splines to file <"<<covName<<">"<<Log::endl;
writeFileTimeSplinesCovariance(covName, GM, R, minDegree, maxDegree, splineDegree, times, sigma2List);
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
|
