ossimplugins::JSDDateTime Class Reference

This class represents a date. More...

#include <JSDDateTime.h>

Public Member Functions
	JSDDateTime ()
	constructor More...
	~JSDDateTime ()
	Destructor. More...
	JSDDateTime (const JSDDateTime &rhs)
	Copy constructor. More...
	JSDDateTime (JulianDate day0hTU, double second, double decimal)
	Constructor with date initialisation. More...
	JSDDateTime (CivilDateTime &rhs)
	Constructor with date initialisation using a CivilDateTime. More...
	JSDDateTime (JulianDate &rhs)
	Constructor with date initialisation using a CivilDateTime. More...
	JSDDateTime (MJDDateTime &rhs)
	Constructor with date initialisation using a MJDDateTime (Modified Julian Date - Used for ENVISAT) More...
JSDDateTime &	operator= (const JSDDateTime &rhs)
	Affectation operator. More...
JulianDate	get_day0hTU () const
double	get_second () const
double	get_decimal () const
void	set_day0hTU (JulianDate day)
void	set_second (double second)
void	set_decimal (double decimal)
void	NormDate ()
int	AsJulianDate (JulianDate *julian)
	This function converts the current JSDDateTime into Julian Date. More...
int	AsGMSTDateTime (GMSTDateTime *GMST)
	This function converts the current JSDDateTime into GMST Date. More...
	operator JulianDate ()
	operator GMSTDateTime ()

Protected Attributes
JulianDate	_day0hTU
	Julian day at 0h00 UT. More...
double	_second
double	_decimal

Detailed Description

This class represents a date.

Definition at line 30 of file JSDDateTime.h.

Constructor & Destructor Documentation

JSDDateTime() [1/6]

ossimplugins::JSDDateTime::JSDDateTime

(

)

constructor

Definition at line 28 of file JSDDateTime.cpp.

                        :
  _day0hTU(0),
  _second(0.0),
  _decimal(0.0)
{
}

~JSDDateTime()

ossimplugins::JSDDateTime::~JSDDateTime

(

)

Destructor.

Definition at line 35 of file JSDDateTime.cpp.

{
}

JSDDateTime() [2/6]

ossimplugins::JSDDateTime::JSDDateTime

(

const JSDDateTime &

rhs

)

Copy constructor.

Definition at line 39 of file JSDDateTime.cpp.

                                              :
  _day0hTU(rhs._day0hTU),
  _second(rhs._second),
  _decimal(rhs._decimal)
{
}

JSDDateTime() [3/6]

ossimplugins::JSDDateTime::JSDDateTime	(	JulianDate	day0hTU,
		double	second,
		double	decimal
	)

Constructor with date initialisation.

Definition at line 46 of file JSDDateTime.cpp.

                                                                         :
  _day0hTU(day0hTU),
  _second(second),
  _decimal(decimal)
{
}

JSDDateTime() [4/6]

ossimplugins::JSDDateTime::JSDDateTime

(

CivilDateTime &

rhs

)

Constructor with date initialisation using a CivilDateTime.

Definition at line 53 of file JSDDateTime.cpp.

References ossimplugins::CivilDateTime::AsJSDDateTime().

{
  rhs.AsJSDDateTime(this);
}

JSDDateTime() [5/6]

ossimplugins::JSDDateTime::JSDDateTime

(

JulianDate &

rhs

)

Constructor with date initialisation using a CivilDateTime.

Definition at line 58 of file JSDDateTime.cpp.

References ossimplugins::JulianDate::AsJSDDateTime().

{
  rhs.AsJSDDateTime(this);
}

JSDDateTime() [6/6]

ossimplugins::JSDDateTime::JSDDateTime

(

MJDDateTime &

rhs

)

Constructor with date initialisation using a MJDDateTime (Modified Julian Date - Used for ENVISAT)

Definition at line 64 of file JSDDateTime.cpp.

References _day0hTU, _decimal, _second, ossimplugins::MJDDateTime::get_day(), get_day0hTU(), get_decimal(), ossimplugins::MJDDateTime::get_microsecond(), ossimplugins::MJDDateTime::get_second(), get_second(), NormDate(), ossimplugins::CivilDateTime::set_day(), ossimplugins::CivilDateTime::set_decimal(), ossimplugins::CivilDateTime::set_month(), ossimplugins::CivilDateTime::set_second(), and ossimplugins::CivilDateTime::set_year().

{
  CivilDateTime referenceCiv;

  /* Initialisation of the MJD reference day (01/01/2000, 0h00) */
  referenceCiv.set_year(2000);
  referenceCiv.set_month(01);
  referenceCiv.set_day(01);
  referenceCiv.set_second(0);
  referenceCiv.set_decimal(0.0);

  /* JSD day of the ref. MJD date */
  JSDDateTime referenceJSD(referenceCiv);

  /* JSD day computation */
  JulianDate JD((double) rhs.get_day());

  _day0hTU = referenceJSD.get_day0hTU() + JD;
  _second  = referenceJSD.get_second()  + (double) rhs.get_second();
  _decimal = referenceJSD.get_decimal() + 0.000001 * (double) rhs.get_microsecond();

  this->NormDate();
}

Member Function Documentation

AsGMSTDateTime()

int ossimplugins::JSDDateTime::AsGMSTDateTime

(

GMSTDateTime *

GMST

)

This function converts the current JSDDateTime into GMST Date.

Returns

0 if no error or an int greater than 0 indicating the error

Parameters

julianDate

[out] The class that receives the result of the conversion of the current JSDDateTime into GMST Date

Definition at line 105 of file JSDDateTime.cpp.

References _decimal, _second, ossimplugins::GMSTDateTime::AN1900, ossimplugins::GMSTDateTime::AN1950, ossimplugins::GMSTDateTime::AN2000, AsJulianDate(), ossimplugins::JulianDate::get_julianDate(), ossimplugins::GMSTDateTime::get_origine(), ossimplugins::CivilDateTime::JOURCIVIL_LENGTH, set_decimal(), set_second(), ossimplugins::GMSTDateTime::set_tms(), and TWOPI.

Referenced by ossimplugins::ossimRadarSatModel::InitPlatformPosition(), ossimplugins::GeographicEphemeris::ToGalilean(), and ossimplugins::GalileanEphemeris::ToGeographic().

{
  const double TWOPI      = 6.28318530717958647693 ;
  const double OMEGATERRE  = 6.28318530717958647693 / 86164.09054 ;

  int etat ;
  JulianDate jourJulien;
  double  t = 0.0;
        double tsm0hTU = 0.0;
        double tsm = 0.0;
  JSDDateTime date0hTU ;


  date0hTU         = *this ;
  date0hTU.set_second(0);
  date0hTU.set_decimal(0.0);

  etat = date0hTU.AsJulianDate(&jourJulien ) ;

  if (etat == 0)
  {
    if (GMST->get_origine() == GMSTDateTime::AN1900)
    {
      t       = (jourJulien.get_julianDate() - 2415020.0) / 36525.0 ;
      tsm0hTU = 23925.836 + t * (8640184.542 + t * 0.0929) ;
      tsm0hTU = tsm0hTU * TWOPI / CivilDateTime::JOURCIVIL_LENGTH ;
    }
    else if (GMST->get_origine() == GMSTDateTime::AN1950)
    {
      t       = jourJulien.get_julianDate() - 2433281.5 ;
      tsm0hTU = 1.72944494 + t * 6.3003880987 ;
    }
    else if (GMST->get_origine() == GMSTDateTime::AN2000)
    {
      t       = (jourJulien.get_julianDate() - 2451545.0) / 36525.0 ;
      tsm0hTU =   24110.54841 + t * (8640184.812866
                + t * (0.093103 - t * 6.210e-6)) ;
      tsm0hTU = tsm0hTU * TWOPI / CivilDateTime::JOURCIVIL_LENGTH ;
    }
    t = tsm0hTU + (_second + _decimal) * OMEGATERRE ;
    tsm = fmod (t,TWOPI) ;
    if (tsm < 0.0)
    {
      tsm = tsm + TWOPI ;
    }

    GMST->set_tms(tsm);
  }

  return etat ;
}

AsJulianDate()

int ossimplugins::JSDDateTime::AsJulianDate

(

JulianDate *

julian

)

This function converts the current JSDDateTime into Julian Date.

Returns

0 if no error or an int greater than 0 indicating the error

Parameters

julianDate

[out] The classe that receives the result of the conversion of the current JSDDateTime in JulianDate

Definition at line 97 of file JSDDateTime.cpp.

References _day0hTU, _decimal, _second, ossimplugins::JulianDate::get_julianDate(), ossimplugins::CivilDateTime::JOURCIVIL_LENGTH, and ossimplugins::JulianDate::set_julianDate().

Referenced by AsGMSTDateTime(), and ossimplugins::JulianDate::JulianDate().

{
  double jourJulien = _day0hTU.get_julianDate() + (_second + _decimal) / CivilDateTime::JOURCIVIL_LENGTH ;
  julian->set_julianDate(jourJulien);

  return 0 ;
}

get_day0hTU()

JulianDate ossimplugins::JSDDateTime::get_day0hTU ( ) const

inline

Definition at line 71 of file JSDDateTime.h.

Referenced by ossimplugins::PlatformPosition::InitAuxiliaryData(), ossimplugins::PlatformPosition::Interpolate(), JSDDateTime(), ossimplugins::Ephemeris::saveState(), and ossimplugins::GalileanEphemeris::ToGeographic().

   {
      return _day0hTU;
   }

get_decimal()

double ossimplugins::JSDDateTime::get_decimal ( ) const

inline

Definition at line 81 of file JSDDateTime.h.

Referenced by ossimplugins::ossimEnvisatAsarModel::FindSRGRSetNumber(), ossimplugins::ossimRadarSat2Model::FindSRGRSetNumber(), ossimplugins::ossimRadarSatModel::FindSRGRSetNumber(), ossimplugins::PlatformPosition::InitAuxiliaryData(), ossimplugins::PlatformPosition::Interpolate(), JSDDateTime(), and ossimplugins::Ephemeris::saveState().

   {
      return _decimal;
   }

get_second()

double ossimplugins::JSDDateTime::get_second ( ) const

inline

Definition at line 76 of file JSDDateTime.h.

Referenced by ossimplugins::CivilDateTime::AsJSDDateTime(), ossimplugins::JulianDate::AsJSDDateTime(), ossimplugins::ossimEnvisatAsarModel::FindSRGRSetNumber(), ossimplugins::ossimRadarSat2Model::FindSRGRSetNumber(), ossimplugins::ossimRadarSatModel::FindSRGRSetNumber(), ossimplugins::ossimGeometricSarSensorModel::getTime(), ossimplugins::PlatformPosition::InitAuxiliaryData(), ossimplugins::ossimErsSarModel::InitPlatformPosition(), ossimplugins::ossimAlosPalsarModel::InitPlatformPosition(), ossimplugins::ossimRadarSatModel::InitPlatformPosition(), ossimplugins::PlatformPosition::Interpolate(), JSDDateTime(), and ossimplugins::Ephemeris::saveState().

   {
      return _second;
   }

NormDate()

void ossimplugins::JSDDateTime::NormDate

(

)

Definition at line 157 of file JSDDateTime.cpp.

References _day0hTU, _decimal, _second, ossimplugins::fnint(), ossimplugins::JulianDate::get_julianDate(), ossimplugins::inint(), and ossimplugins::CivilDateTime::JOURCIVIL_LENGTH.

Referenced by ossimplugins::ossimGeometricSarSensorModel::getTime(), ossimplugins::ossimErsSarModel::InitPlatformPosition(), ossimplugins::ossimAlosPalsarModel::InitPlatformPosition(), ossimplugins::ossimRadarSatModel::InitPlatformPosition(), and JSDDateTime().

{
  const double epsilon = 1.0e-12 ;

  int k, iu, iv, iw ;
  double u, v, w, ru, rv, rw ;


  w = _day0hTU.get_julianDate() - 0.5 ;
  if (fabs (w - fnint (w)) < epsilon)
  {
    iw = (int)inint(w) ;
    rw = 0.0 ;
  }
  else
  {
    iw = (int)w ;
    rw = w - (double)iw ;
    if ((iw < 0) && (rw != 0.0))
    {
    iw = iw - 1 ;
    rw = rw + 1.0 ;
    }
  }

  v = _second + rw * CivilDateTime::JOURCIVIL_LENGTH ;
  if (fabs(v - fnint (v)) < epsilon)
  {
    iv = (int)inint (v) ;
    rv = 0.0 ;
  }
  else
  {
    iv = (int)v ;
    rv = v - (double)iv ;
    if ((iv < 0) && (rv != 0.0))
    {
      iv = iv - 1 ;
      rv = rv + 1.0 ;
    }
  }

  u  = _decimal + rv ;
  iu = (int)u ;
  ru = u - (double)iu ;
  if ((iu < 0) && (ru != 0.0))
  {
    iu = iu - 1 ;
    ru = ru + 1.0 ;
  }

  iv = iv + iu ;
  k  = iv / ((int)inint(CivilDateTime::JOURCIVIL_LENGTH)) ;
  iw = iw + k ;
  iv = iv - k * ((int)inint(CivilDateTime::JOURCIVIL_LENGTH)) ;
  if (iv < 0)
  {
    iw = iw - 1 ;
    iv = iv + (int)inint(CivilDateTime::JOURCIVIL_LENGTH) ;
  }

  _decimal    = ru ;
  _second  = (double)iv ;
  _day0hTU = (double)iw + 0.5 ;
}

operator GMSTDateTime()

ossimplugins::JSDDateTime::operator GMSTDateTime

(

)

Definition at line 230 of file JSDDateTime.cpp.

{
  GMSTDateTime date;
  this->AsGMSTDateTime(&date);
  return date;
}

operator JulianDate()

ossimplugins::JSDDateTime::operator JulianDate

(

)

Definition at line 223 of file JSDDateTime.cpp.

{
  JulianDate date;
  this->AsJulianDate(&date);
  return date;
}

operator=()

JSDDateTime & ossimplugins::JSDDateTime::operator=

(

const JSDDateTime &

rhs

)

Affectation operator.

Definition at line 88 of file JSDDateTime.cpp.

References _day0hTU, _decimal, and _second.

{
  _day0hTU = rhs._day0hTU;
  _second = rhs._second;
  _decimal = rhs._decimal;

  return *this;
}

set_day0hTU()

void ossimplugins::JSDDateTime::set_day0hTU ( JulianDate  day )

inline

Definition at line 86 of file JSDDateTime.h.

Referenced by ossimplugins::CivilDateTime::AsJSDDateTime(), ossimplugins::JulianDate::AsJSDDateTime(), and ossimplugins::Ephemeris::loadState().

   {
      _day0hTU = day;
   }

set_decimal()

void ossimplugins::JSDDateTime::set_decimal ( double  decimal )

inline

Definition at line 96 of file JSDDateTime.h.

Referenced by AsGMSTDateTime(), ossimplugins::CivilDateTime::AsJSDDateTime(), ossimplugins::JulianDate::AsJSDDateTime(), and ossimplugins::Ephemeris::loadState().

   {
      _decimal = decimal;
   }

set_second()

void ossimplugins::JSDDateTime::set_second ( double  second )

inline

Definition at line 91 of file JSDDateTime.h.

Referenced by AsGMSTDateTime(), ossimplugins::CivilDateTime::AsJSDDateTime(), ossimplugins::JulianDate::AsJSDDateTime(), ossimplugins::ossimGeometricSarSensorModel::getTime(), ossimplugins::ossimErsSarModel::InitPlatformPosition(), ossimplugins::ossimAlosPalsarModel::InitPlatformPosition(), ossimplugins::ossimRadarSatModel::InitPlatformPosition(), and ossimplugins::Ephemeris::loadState().

   {
      _second = second;
   }

Member Data Documentation

_day0hTU

JulianDate ossimplugins::JSDDateTime::_day0hTU

protected

Julian day at 0h00 UT.

Definition at line 125 of file JSDDateTime.h.

Referenced by AsJulianDate(), JSDDateTime(), NormDate(), and operator=().

_decimal

double ossimplugins::JSDDateTime::_decimal

protected

Definition at line 127 of file JSDDateTime.h.

Referenced by AsGMSTDateTime(), AsJulianDate(), JSDDateTime(), NormDate(), and operator=().

_second

double ossimplugins::JSDDateTime::_second

protected

Definition at line 126 of file JSDDateTime.h.

Referenced by AsGMSTDateTime(), AsJulianDate(), JSDDateTime(), NormDate(), and operator=().

---

The documentation for this class was generated from the following files:

• JSDDateTime.h
• JSDDateTime.cpp