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/***********************************************/
/**
* @file merit2NormalPoints.cpp
*
* @brief Read SLR data (normal points) from merit format.
*
* @author Barbara Suesser-Rechberger
* @date 2023-01-17
*
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
Converts \href{https://ilrs.gsfc.nasa.gov/data_and_products/data/npt/npt_format.html}{MERIT II file}
and writes an \file{instrument file (METEOROLOGICAL)}{instrument} including meteorological data like
temperature, air pressure and humidity as well as an \file{instrument file (SATELLITELASERRANGING)}{instrument}
including normal point data like range, accuracy, redundancy, wavelength, window size, azimuth and elevation.
)";
/***********************************************/
#include "programs/program.h"
#include "base/string.h"
#include "inputOutput/file.h"
#include "files/fileInstrument.h"
#include <string_view>
/***** CLASS ***********************************/
/** @brief Read SLR data (normal points) from merit format.
* @ingroup programsConversionGroup */
class Merit2NormalPoints
{
std::vector<std::string> splitString(const std::string& str);
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(Merit2NormalPoints, SINGLEPROCESS, "Read SLR data (normal points) from merit format.", Conversion, Slr, Instrument)
/***********************************************/
void Merit2NormalPoints::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName fileNameNormalPoints;
FileName fileNameMeteorological;
FileName fileNameIn;
readConfig(config, "outputfileNormalPoints", fileNameNormalPoints, Config::MUSTSET, "output/normalsPoints_{station}.dat", "variable {station} available");
readConfig(config, "outputfileMeteorological", fileNameMeteorological, Config::MUSTSET, "output/meteorological_{station}.dat", "variable {station} available");
readConfig(config, "inputfileSlrData", fileNameIn, Config::MUSTSET, "", "SLR MERIT II file");
if(isCreateSchema(config)) return;
logStatus<<"read file <"<<fileNameIn<<">"<<Log::endl;
InFile file(fileNameIn);
std::string line;
std::string stationMonumentNumber;
std::multimap<std::string, MeteorologicalEpoch> metEpochStations;
std::multimap<std::string, SatelliteLaserRangingEpoch> normalPointEpochStations;
std::vector<std::string> stationMonumentNumbers;
while(std::getline(file, line))
{
if(line.empty())
continue;
SatelliteLaserRangingEpoch nPointEpoch;
MeteorologicalEpoch mEpoch;
Int normalPointWindowIndicator = String::toInt(line.substr(114, 1));
//logStatus<<"normalPointWindowIndicator: <"<< normalPointWindowIndicator<<">"<<Log::endl;
if(normalPointWindowIndicator > 0)
{
// Store different station monument numbers
std::string stationMonumentNumber = line.substr(24, 4);
if(!stationMonumentNumbers.empty())
{
if(std::find(stationMonumentNumbers.begin(), stationMonumentNumbers.end(), stationMonumentNumber) == stationMonumentNumbers.end())
stationMonumentNumbers.push_back(stationMonumentNumber);
}
else
{
stationMonumentNumbers.push_back(stationMonumentNumber);
}
Int year = String::toInt(line.substr(7,2));
//logStatus<<"Year: <"<< year<<">"<<Log::endl;
year += (year <= 50) ? 2000 : 1900;
// Session time in UTC
Time sessionDate = date2time(year,1,1)+mjd2time(String::toInt(line.substr(9,3))-1);
// In merit II file the seconds are given in the units of 0.1 us
Time time = sessionDate + seconds2time(std::stod(line.substr(12,12))*1e-7);
Int epoch = String::toInt(line.substr(119,1));
Double timeOfFlight = std::stod(line.substr(45, 12))*1e-12;
switch(epoch)
{
case 0: time -= seconds2time(timeOfFlight); break; // ground receive time (at SRP) (two-way)
case 1: time -= seconds2time(0.5*timeOfFlight); break; // spacecraft bounce time (two-way)
case 2: /* standard */ break; // ground transmit time (at SRP) (two-way)
default:
logWarning<<epoch<<" Epoch Event (indicates the time event reference) not implemented"<<Log::endl;
}
nPointEpoch.time = timeUTC2GPS(time);
nPointEpoch.range = 0.5*timeOfFlight*LIGHT_VELOCITY;
/* ILRS: The user of the data should interpret the value given as follows:
3000 - 9999: units are 0.1 nanometer
1000 - 2999: units are 1.0 nanometer
*/
Double transmitWavelength = std::stod(line.substr(64, 4));
if(transmitWavelength >= 3000)
nPointEpoch.wavelength = transmitWavelength*1e-10;
else
nPointEpoch.wavelength = transmitWavelength*1e-9;
// In the merit format there is no information about the bin RMS, we take the pass RMS
Double passRMS = std::stod(line.substr(58, 7));
nPointEpoch.redundancy = std::stod(line.substr(115, 4));
logStatus<<"epoch: <"<< epoch<<">"<<Log::endl;
if(nPointEpoch.redundancy > 1)
nPointEpoch.accuracy = 0.5*passRMS*1e-12/std::sqrt(nPointEpoch.redundancy-1)*LIGHT_VELOCITY;
else
nPointEpoch.accuracy = 0.5*passRMS*1e-12*LIGHT_VELOCITY;
if(normalPointWindowIndicator == 1)
nPointEpoch.window = 5;
else if(normalPointWindowIndicator == 3)
nPointEpoch.window = 15;
else if(normalPointWindowIndicator == 4)
nPointEpoch.window = 20;
else if(normalPointWindowIndicator == 5)
nPointEpoch.window = 30;
else if(normalPointWindowIndicator == 6)
nPointEpoch.window = 60;
else if(normalPointWindowIndicator == 7)
nPointEpoch.window = 120;
else if(normalPointWindowIndicator == 8)
nPointEpoch.window = 180;
else if(normalPointWindowIndicator == 9)
nPointEpoch.window = 300;
else
nPointEpoch.window = NAN;
// Azimuth and Elevation given in 0.1 mdegrees
nPointEpoch.azmiuth = DEG2RAD*std::stod(line.substr(32, 7))*1e-4;
nPointEpoch.elevation = DEG2RAD*std::stod(line.substr(39, 6))*1e-4;
mEpoch.time = nPointEpoch.time;
// surface temperature in [K]: in cstg file it is given in 0.1 degree Kelvin
mEpoch.temperature = std::stod(line.substr(73, 4))*1e-1;
// pressure in [Pa]: in cstg file it is given in 0.1 millibar = 10 Pa
mEpoch.pressure = std::stod(line.substr(68, 5))*10;
// relative humidity in percent
mEpoch.humidity = std::stod(line.substr(77, 3));
mEpoch.windSpeed = NAN;
mEpoch.solarRadiation = NAN;
mEpoch.precipitation = NAN;
normalPointEpochStations.insert({stationMonumentNumber, nPointEpoch});
metEpochStations.insert({stationMonumentNumber, mEpoch});
} else
{
logStatus<<"File includes full-rate data. Please use merit2FullRate conversion program!<"<<fileNameNormalPoints<<">"<<Log::endl;
break;
}
} // while
// write results
// -------------
for(auto stationMonumentNr : stationMonumentNumbers)
{
SatelliteLaserRangingArc arcSlr;
MeteorologicalArc arcMeteorological;
for(const auto &npStat : normalPointEpochStations)
{
if(npStat.first == stationMonumentNr)
arcSlr.push_back(npStat.second);
}
for(const auto &metStat : metEpochStations)
{
if(metStat.first == stationMonumentNr)
arcMeteorological.push_back(metStat.second);
}
VariableList varList;
varList.setVariable("station", stationMonumentNr);
if(arcSlr.size())
{
logStatus<<"write normal point data to file <"<<fileNameNormalPoints(varList)<<">"<<Log::endl;
InstrumentFile::write(fileNameNormalPoints(varList), arcSlr);
Arc::printStatistics(arcSlr);
}
if(arcMeteorological.size())
{
logStatus<<"write meteorological data to file <"<<fileNameMeteorological(varList)<<">"<<Log::endl;
InstrumentFile::write(fileNameMeteorological(varList), arcMeteorological);
Arc::printStatistics(arcMeteorological);
}
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
|
