Coordinates Class Reference

Simple spherical coordinate computation. Does not handle projections, but earth coords. More...

#include <Coordinates.h>

Public Member Functions
void	setOrigin (const double &theta, const double &phi)
	Radar site latitude and longitude in radians.
void	setOriginDeg (const double &lat, const double &lon)
	Set target projection. // void setProjection(const std::string &s);.
void	setBinPosition (const double &alpha, const float &range)
void	info (std::ostream &ostr=std::cout)
	Determines the bounding box (in degrees) of the circular radar measurement area.
double	binLatitudeDeg ()
	Bin latitude in degrees after calling bin_position().
double	binLongitudeDeg ()
	Bin longitude in degrees after calling bin_position().

Public Attributes
double	p01
	Radar position vector (from Earth center to surface.
double	p02
double	p03
double	p1
	Earth centered coordinates [p_1 p_2 p_3] of the current bin position.
double	p2
double	p3
double	e11
	Elelements of the East pointing site unit vector [e11 e12 e13].
double	e12
double	e13
double	e21
	Elelements of the North pointing site unit vector [e21 e22 e23].
double	e22
double	e23
double	thetaBin
	Bin latitude in radians after calling bin_position().
double	phiBin
	Bin longitude in radians after calling bin_position().

Detailed Description

Simple spherical coordinate computation. Does not handle projections, but earth coords.

Variable names

• \(\phi\), phi: longitude of radar site (in radians)
• \(\theta\), theta: latitude of radar site (in radians)
• \(\alpha\), alpha: azimuth angle of the radar beam, \(+\pi/2\)=North
• \(r\): distance to the surface point
• \(\boldmath{e}_{i}=(e_{i1}e_{i1}e_{i1})\): unit vectors at the site

Note. This is a model for ideal sphere, defined as

"+proj=longlat +R=6371000 +no_defs";

where R is the radius of the Earth. Use getDatumString() to get the actual std::string.

Note that this is not equivalent with

EPSG:4326 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";

Member Function Documentation

info()

void info

(

std::ostream &

ostr = std::cout

)

Determines the bounding box (in degrees) of the circular radar measurement area.

Info

Sets surface coordinates (phiBin, thetaBin) according to polar coordinates.

Polar coordinates.

setBinPosition()

void setBinPosition	(	const double &	azimuth,
		const float &	range
	)

Parameters

range

in metres.

Explanation? Sets surface coordinates (phiBin, thetaBin) according to polar coordinates.

lon = atan2((e11*x1 + e21*x2 + p01*x3), (e12*x1 + e22*x2 + p02*x3));

setOrigin()

void setOrigin	(	const double &	theta,
		const double &	phi
	)

Radar site latitude and longitude in radians.

Set origin in radians.

To speed up the computation of bin locations, some internal variables are set at this stage.

Parameters

theta	latitude in radians
phi	longitude in radians

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

• src/radar/Coordinates.h
• src/radar/Coordinates.cpp