astro::SkyPos Class Reference

A class representing an arbtrary position on the sky.

Public Member Functions

• SkyPos ()
• SkyPos (const double ra, const double dec, const double epoch=2000.)
• SkyPos (const std::string &, const std::string &, const double epoch=2000.)
• SkyPos (const SkyPos &)

  Copy constructor.
  

• void setEpoch (const double epoch)
• double epoch ()
• void setRA (double)

  set Right Ascension of the object
  

• void setRA_rad (double)
• void setRA (const std::string &raStr)

  set Declination of the object
  

• double ra () const

  retrieve RA as a double
  

• double ra_deg () const

  retrieve RA in degree as a double
  

• double ra_rad () const

  retrieve RA as rad
  

• std::string raString (const int prec=2) const

  retrieve RA as a string of the format hh:mm:ss.prec
  

• void setDec (double)
• void setDec_rad (double dec_rad)
• void setDec (const std::string &decStr)
• double dec () const
• double dec_rad () const
• std::string decString (const int prec=2) const
• double hourAngle (const util::UTDate &date, const ObsSite &obs) const
• double hourAngleDeg (const util::UTDate &date, const ObsSite &obs) const
• double altitude (const util::UTDate &date, const ObsSite &obs) const
• double azimuth (const util::UTDate &date, const ObsSite &obs) const
• std::string hourAngleStr (const util::UTDate &date, const ObsSite &obs, const int prec=2) const
• std::string altitudeStr (const util::UTDate &date, const ObsSite &obs, const int prec=2) const
• std::string azimuthStr (const util::UTDate &date, const ObsSite &obs, const int prec=2) const
• double airmass (const util::UTDate &date, const ObsSite &) const

Protected Attributes

• double epoch_
• double ra_
• double dec_

---

Constructor & Destructor Documentation

astro::SkyPos::SkyPos

(

)

Default constructor, creates a SkyPos object with ra, dec and epoch set to 0.

References setDec(), setEpoch(), and setRA().

astro::SkyPos::SkyPos	(	const double	ra,
		const double	dec,
		const double	epoch = 2000.
	)

Construct a SkyPos object from double ra and dec if ra not in [0;24] it is transformed to fall into that range. the same is done for dec values outside [-90;90]

References setDec(), setEpoch(), and setRA().

astro::SkyPos::SkyPos	(	const std::string &	raStr,
		const std::string &	decStr,
		const double	epoch = 2000.
	)

Construct a SkyPos object from double ra and dec. The given strings can either be the string representation of a double or a coordinate in the form [+-]dd:dd:dd[.dd] . If the format is not one of the two an SkyPosException is thrown.

if ra not in [0;24] it is transformed to fall into that range. the same is done for dec values outside [-90;90]

References setDec(), setEpoch(), and setRA().

astro::SkyPos::SkyPos

(

const SkyPos &

other

)

References dec_, epoch_, and ra_.

---

Member Function Documentation

void astro::SkyPos::setEpoch

(

const double

epoch

)

References epoch_.

Referenced by SkyPos().

double astro::SkyPos::epoch

(

)

References epoch_.

Referenced by main().

void astro::SkyPos::setRA

(

double

ra

)

References ra_.

Referenced by setRA_rad(), and SkyPos().

void astro::SkyPos::setRA_rad

(

double

ra_rad

)

References astro::rad_per_hour, and setRA().

void astro::SkyPos::setRA

(

const std::string &

raStr

)

[inline]

References astro::hms2dbl(), ra_, and astro::str2hms().

double astro::SkyPos::ra

(

)

const

References ra_.

Referenced by main().

double astro::SkyPos::ra_deg

(

)

const

References ra_.

Referenced by hourAngleDeg().

double astro::SkyPos::ra_rad

(

)

const

References ra_, and astro::rad_per_hour.

std::string astro::SkyPos::raString

(

const int

prec = 2

)

const

References astro::hms2str(), and ra_.

Referenced by main().

void astro::SkyPos::setDec

(

double

dec

)

References dec_.

Referenced by setDec_rad(), and SkyPos().

void astro::SkyPos::setDec_rad

(

double

dec_rad

)

References astro::rad_per_deg, and setDec().

void astro::SkyPos::setDec

(

const std::string &

decStr

)

[inline]

References dec_, astro::dms2dbl(), and astro::str2dms().

double astro::SkyPos::dec

(

)

const

References dec_.

double astro::SkyPos::dec_rad

(

)

const

References dec_, and astro::rad_per_deg.

std::string astro::SkyPos::decString

(

const int

prec = 2

)

const

References dec_, and astro::dms2str().

Referenced by main().

double astro::SkyPos::hourAngle	(	const util::UTDate &	date,
		const ObsSite &	obs
	)			const

References hourAngleDeg().

Referenced by hourAngleStr().

double astro::SkyPos::hourAngleDeg	(	const util::UTDate &	date,
		const ObsSite &	obs
	)			const

References astro::ObsSite::lon(), and ra_deg().

Referenced by altitude(), azimuth(), and hourAngle().

double astro::SkyPos::altitude	(	const util::UTDate &	date,
		const ObsSite &	obs
	)			const

References astro::asindeg(), astro::cosdeg(), dec_, hourAngleDeg(), astro::ObsSite::lat(), and astro::sindeg().

Referenced by airmass(), altitudeStr(), and azimuth().

double astro::SkyPos::azimuth	(	const util::UTDate &	date,
		const ObsSite &	obs
	)			const

References a, altitude(), astro::atan2deg(), astro::cosdeg(), dec_, hourAngleDeg(), astro::ObsSite::lat(), and astro::sindeg().

Referenced by azimuthStr().

std::string astro::SkyPos::hourAngleStr	(	const util::UTDate &	date,
		const ObsSite &	obs,
		const int	prec = 2
	)			const

References astro::hms2str(), and hourAngle().

std::string astro::SkyPos::altitudeStr	(	const util::UTDate &	date,
		const ObsSite &	obs,
		const int	prec = 2
	)			const

References altitude(), and astro::dms2str().

std::string astro::SkyPos::azimuthStr	(	const util::UTDate &	date,
		const ObsSite &	obs,
		const int	prec = 2
	)			const

References azimuth(), and astro::hms2str().

double astro::SkyPos::airmass	(	const util::UTDate &	date,
		const ObsSite &	obs
	)			const

Return the airmass for the SkyPos sp at date. If the altitude of the object is smaller than 3., or negative (i.e under the horizon) -1 is returned.

References altitude(), and astro::sindeg().

Referenced by main().

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Field Documentation

double astro::SkyPos::epoch_ [protected]

Referenced by epoch(), setEpoch(), and SkyPos().

double astro::SkyPos::ra_ [protected]

Referenced by ra(), ra_deg(), ra_rad(), raString(), setRA(), and SkyPos().

double astro::SkyPos::dec_ [protected]

Referenced by altitude(), azimuth(), dec(), dec_rad(), decString(), setDec(), and SkyPos().