Fractl parameter file

FRACTL Parameter Descriptions

Fractl calculates U, V, and W wind components from 2 or more Doppler

DEBUGGIN

debug

Debug option.

If set, debug messages will be printed appropriately.

Type: enum

Options:

• DEBUG_OFF
• DEBUG_NORM
• DEBUG_VERBOSE
• DEBUG_EXTRA

debug = DEBUG_OFF

detailSpec

detail spec used for debugging only. Example: "5,20,30,0.1".

Type: string

detailSpec = "not_set"

MINIMUM VALUE

minDbz

Minimum dBZ value for valid data.

Any value below that will be tossed out. Example: -20.

Type: double

minDbz = -20

minNcp

Minimum NCP value for valid data.

Any value below that will be tossed out. Example: 0.3.

Type: double

minNcp = 0

TEST MODE

testMode

Test mode.

; MODE_ALPHA:

Use simple synthetic wind data. Skip the redar files. Must specify synWinds: W,V,U Obs are located at the verif cell centers.

MODE_BETA

Use simple synthetic wind data. Read swp files and use swp obs locations, but replace radial vel with synthetic. Must specify synWinds: W,V,U radFiles beg,lim Use radar files i: beg <= i < lim. If beg == lim == 0, read all files

MODE_ZETA

Operational: use specified radar data. Specify synWinds: 0,0,0 radFiles beg,lim Use radar files i: beg <= i < lim. If beg == lim == 0, read all files

MODE_ZETA_BELTRAMI

Like zeta, but compare the results with the test Beltrami flow and print statistics. Specify synWinds: 0,0,0 This is only useful for swp files generated by Michael Bell's Beltrami flow simulation.

MODE_GAMMA

Like zeta, but compare the results with the constant flow and print statistics. Specify synWinds: 0,0,0.

Type: enum

Options:

• MODE_NONE
• MODE_ALPHA
• MODE_BETA
• MODE_ZETA
• MODE_ZETA_BELTRAMI
• MODE_GAMMA

testMode = MODE_ZETA

radFiles

Use radar files i: start <= i < limit. Read all files if start == limit == 0.

Type: string

radFiles = "0,0"

SYN WIND

synWinds

Specify a comma sep triplet: W,V,U If a wind spec is numeric, use that constant uniform value. Else the wind spec is the name for one of SYNFUNC* values: "sinx": wind component = sin(locx) "siny": wind component = sin(locy) "sinz": wind component = sin(locz) Example: -synWinds 3,sinx,sinx Means uniform Z wind at 3 m/s. Both V and U winds = sin(locx), so the wind would be from the SW to the NW, varying as sin(locx).

Type: string

synWinds = "0,0,0"

GRID SPEC

zGrid

; "min,max,incr"

To get min and max from the data, specify only the increment.

Type: string

zGrid = "0.0,16.0,0.5"

yGrid

"min,max,incr" or "incr".

Type: string

yGrid = "-150.0,250.0,1"

xGrid

"min,max,incr" or "incr".

Type: string

xGrid = "-200.0,100.0,1"

GRID_TYPE

gridType

Mesh for stand-alone. Mish for Samurai input.

Type: enum

Options:

• GRID_MESH
• GRID_MISH

gridType = GRID_MESH

PROJECTION

projName

Must be transverseMercador.

Type: string

projName = "transverseMercator"

projLat0

For example: 16.5.

Type: double

projLat0 = 34.675063013242

projLon0

For example: 148.0.

Type: double

projLon0 = -99.8960354021649

radarAlt

only needed for pre gridded mode.

Type: double

radarAlt = -1

MISC

baseW

Type: double

baseW = 0

epsilon

Type: double

epsilon = 1e-06

LIMITS

maxDeltaAltKm

in km. Default 0.

Type: double

maxDeltaAltKm = 0

maxAbsElevDeg

in degree.

Type: double

maxAbsElevDeg = 0

minRadialDistKm

in km.

Type: double

minRadialDistKm = 0

numNbrMax

Type: int

numNbrMax = 100

maxDistBase

max point distance = base + factor * aircraftDist.

Type: double

maxDistBase = 1

maxDistFactor

max point distance = base + factor * aircraftDist.

Type: double

maxDistFactor = 0.016666

FLAG

forceOk

y/n.

Type: string

forceOk = "n"

useEigen

y: use Eigen, n: use Cramer.

Type: string

useEigen = "y"

preGridded

(NOT WORKING YET) Data is pre-gridded.

Type: string

preGridded = "n"

FILES AND DIRECTORIES

inDir

Any radx supported format, or output of Radx2Grid.

Type: string

input_dir = ".";

fileRegex

for example '^swp'.

Type: string

fileRegex = "^cfrad"

fileList

One entry per line fileName altKmMsl latDeg lonDeg # in the first column is a comment.

Type: string

fileList = "not_set"

outTxt

Has verification of grid results.

Type: string

outTxt = "out.txt"

outNc

; If outNc ends in a slash we make a subdir and write to

yyyymmdd/ncf_yyyymmdd_hhmmss.nc.

Type: string

outNc = "output.nc"

FIELDS

radialName

VEL for NEXRAD, VG for Eldora, VE for CSU-CHILL.

Type: string

radialName = "VEL"

dbzName

REF for NEXRAD, DBZ for Eldora, DZ for CSU-CHILL.

Type: string

dbzName = "REF"

ncpName

Not available for NEXRAD, NCP for Eldora, NC for CSU-CHILL.

Type: string

ncpName = "VELUNF"

FILTERS

uvFilter

Type: enum

Options:

• FILTER_NONE
• FILTER_LEISE

uvFilter = FILTER_NONE

wFilter

Type: enum

Options:

• FILTER_NONE
• FILTER_LEISE

wFilter = FILTER_NONE

uvSteps

; Applies to all dimensions. Use uvMultiSteps for dimension specific

steps.

Type: int

uvSteps = 1

uvMultiStep

Comma separated steps. Example: "1,2,1".

Type: string

uvMultiStep = "not_set"

wSteps

; Applies to all dimensions. Use wMultiStep for dimension specific

steps.

Type: int

wSteps = 1

wMultiStep

Comma separated steps. Example: "1,2,1".

Type: string

wMultiStep = "not_set"

INTERPOLATION

uvInterp

Applied before calculating W.

Type: enum

Options:

• INTERP_NONE
• INTERP_LEISE
• INTERP_RADAR_WIND

uvInterp = INTERP_NONE