Signal Namespace Reference

Defines various signal types. More...

Enumerations
enum	Basis { Circular =0, Linear =1, Elliptical =2 }
	The basis in which the electric field is represented.
enum	Hand { Left =-1, Right =1 }
	The hand of the basis.
enum	Argument { Conjugate =-1, Conventional =1 }
	The complex phase of the basis.
enum	Dimension {   Time, Frequency, Polarization, Phase,   Space }
	Dimensions of the data (so far) More...
enum	Scale {   EMF, Volts, Energy, Joules,   FluxDensity, ReferenceFluxDensity, Jansky }
	The scale in which units are measured. More...
enum	Source {   Unknown, Pulsar, PolnCal, FluxCalOn,   FluxCalOff, Calibrator }
	Sources of observed signals. More...
enum	State {   Nyquist, Analytic, Intensity, NthPower,   PPQQ, Coherence, Stokes, PseudoStokes,   Invariant, Other, PP_State, QQ_State,   FourthMoment }
	Possible states of the data. More...

Functions
std::ostream &	operator<< (std::ostream &, Basis)
	Basis output operator.
std::istream &	operator>> (std::istream &, Basis &)
	Basis input operator.
std::ostream &	operator<< (std::ostream &, Hand)
	Hand output operator.
std::istream &	operator>> (std::istream &, Hand &)
	Hand input operator.
std::ostream &	operator<< (std::ostream &, Argument)
	Argument output operator.
std::istream &	operator>> (std::istream &, Argument &)
	Argument input operator.
unsigned	State2npol (State s)
const char *	source_string (Source source)
const char *	state_string (State state)
const char *	basis_string (Basis basis)
const std::string	Source2string (Source source)
const std::string	State2string (State state)
const std::string	Basis2string (Basis basis)
const std::string	Scale2string (Scale scale)
Basis	string2Basis (const std::string &ss)
Source	string2Source (const std::string &ss)
State	string2State (const std::string &ss)
Scale	string2Scale (const std::string &ss)
bool	valid_state (State state, unsigned ndim, unsigned npol, std::string &reason)
	Tells you if your state is consistent with your npol and ndim.
State	pscrunch (State state)
	Returns the state resulting from a pscrunch operation.
std::ostream &	operator<< (std::ostream &ostr, Source source)
std::istream &	operator>> (std::istream &is, Source &source)
std::ostream &	operator<< (std::ostream &ostr, State state)
std::istream &	operator>> (std::istream &is, State &state)
std::ostream &	operator<< (std::ostream &ostr, Scale scale)
std::istream &	operator>> (std::istream &is, Scale &scale)

Detailed Description

Defines various signal types.

Enumeration Type Documentation

Dimension

enum Signal::Dimension

Dimensions of the data (so far)

Enumerator
Time	Time given in MJD.
Frequency	Radio Frequency in MHz.
Polarization	Light.
Phase	Pulsar Phase, for instance.
Space	Mathematical space (real, complex, jones, etc.)

Scale

enum Signal::Scale

The scale in which units are measured.

Enumerator
EMF	Uncalibrated voltage.
Volts	Calibrated voltage.
Energy	Uncalibrated energy.
Joules	Calibrated energy.
FluxDensity	Uncalibrated flux density.
ReferenceFluxDensity	Reference flux density.
Jansky	Calibrated flux density.

Source

enum Signal::Source

Sources of observed signals.

Enumerator
Unknown	An unknown source.
Pulsar	A pulsar.
PolnCal	A polarization calibrator, such as the linear noise diode.
FluxCalOn	A flux calibrator, such as Hydra A + the linear noise diode.
FluxCalOff	Near a flux calibrator, such as two degrees off Hydra A.
Calibrator	A calibrator solution.

State

enum Signal::State

Possible states of the data.

Enumerator
Nyquist	Nyquist sampled voltages (real)
Analytic	In-phase and Quadrature sampled voltages (complex)
Intensity	Square-law detected total power.
NthPower	Square-law detected nth power.
PPQQ	Square-law detected, two polarizations.
Coherence	PP, QQ, Re[PQ], Im[PQ].
Stokes	Stokes I,Q,U,V.
PseudoStokes	PseudoStokes S0,S2,S2,S3.
Invariant	Stokes invariant interval.
Other	Other.
PP_State	Just PP.
QQ_State	Just QQ.
FourthMoment	Fourth moment of the electric field (covariance of Stokes parameters)