dealias.c File Reference

Function for dealiasing weather radar winds. More...

#include "dealias.h"

Functions
double	max_vector (double *a, int n)
	Returns the maximum of a vector.
double	min_vector (double *a, int n)
	Returns the minimum of a vector.
int	dealiased_by_quantity (PolarScan_t *scan, const char *quantity)
	Determines whether a scan is dealiased or not.
int	dealiased (PolarScan_t *scan)
	Determines whether a scan is dealiased or not and performs dealiasing of the VRAD parameter.
PolarScanParam_t *	create_dealiased_parameter (PolarScan_t *scan, const char *quantity, const char *newquantity)
	Creates a dealiased parameter from the scan / quantity.
int	dealias_scan_by_quantity (PolarScan_t *scan, const char *quantity, double emax)
	Function for dealiasing polar scan data for the specified parameter.
int	dealias_scan (PolarScan_t *scan)
	Function for dealiasing polar scan data for the VRAD parameter.
int	dealias_pvol_by_quantity (PolarVolume_t *inobj, const char *quantity, double emax)
	Function for dealiasing polar volume data for the specified parameter.
int	dealias_pvol (PolarVolume_t *inobj)
	Function for dealiasing polar volume data for the VRAD parameter.

Detailed Description

Function for dealiasing weather radar winds.

Author

Gunther Haase, SMHI

Date

2013-02-06

2018-04-11

• If the number of valid velocity pixels on a circle with radius (range bin)*rscale is below a threshold, no dealiasing is performed.
• Data representation of VRADH/V is no longer hard-coded.

Function Documentation

create_dealiased_parameter()

PolarScanParam_t * create_dealiased_parameter	(	PolarScan_t *	scan,
		const char *	quantity,
		const char *	newquantity )

Creates a dealiased parameter from the scan / quantity.

The created dealiased parameter will get quantity newquantity

Parameters

[in]	scan	- the scan to be dealiased
[in]	quantity	- the quantity to dealias
[in]	newquantity	- the quantity of the dealiased parameter

Returns

the dealiased scan parameter

dealias_pvol()

int dealias_pvol

(

PolarVolume_t *

inobj

)

Function for dealiasing polar volume data for the VRAD parameter.

Same as invoking dealias_pvol_by_quantity(vol, "VRAD").

Parameters

[in]

source

- input volume

Returns

int 1 upon success, otherwise 0

dealias_pvol_by_quantity()

int dealias_pvol_by_quantity	(	PolarVolume_t *	inobj,
		const char *	quantity,
		double	emax )

Function for dealiasing polar volume data for the specified parameter.

Parameters

[in]	source	- input volume
[in]	quantity	- the quantity
[in]	emax	- the maximum elevation angle

Returns

int 1 upon success, otherwise 0

dealias_scan()

int dealias_scan

(

PolarScan_t *

inobj

)

Function for dealiasing polar scan data for the VRAD parameter.

Same as calling dealias_scan_by_quantity(scan, "VRAD").

Parameters

[in]

source

- input scan

Returns

int 1 upon success, otherwise 0

dealias_scan_by_quantity()

int dealias_scan_by_quantity	(	PolarScan_t *	inobj,
		const char *	quantity,
		double	emax )

Function for dealiasing polar scan data for the specified parameter.

Parameters

[in]	source	- input scan
[in]	quantity	- the quantity
[in]	emax	- the maximum elevation angle

Returns

int 1 upon success, otherwise 0

dealiased()

int dealiased

(

PolarScan_t *

scan

)

Determines whether a scan is dealiased or not and performs dealiasing of the VRAD parameter.

Same as calling dealiased_by_quantity(scan, "VRAD").

Parameters

[in]

scan

- input scan

Returns

int 1 if scan is dealiased, otherwise 0

dealiased_by_quantity()

int dealiased_by_quantity	(	PolarScan_t *	scan,
		const char *	quantity )

Determines whether a scan is dealiased or not.

Parameters

[in]	scan	- input scan
[in]	quantity	- the quantity to be dealiased

Returns

int 1 if scan is dealiased, otherwise 0

max_vector()

double max_vector	(	double *	a,
		int	n )

Returns the maximum of a vector.

Parameters

[in]	a	- input vector
[in]	n	- vector length

Returns

maximum of a vector

min_vector()

double min_vector	(	double *	a,
		int	n )

Returns the minimum of a vector.

Parameters

[in]	a	- input vector
[in]	n	- vector length

Returns

minimum of a vector