pyrsig.grids package

Module contents

def_grid_kwdict

Keys are names of known grids. Values are dictionary of keywords for IOAPI grid defintion and RSIG regridding options:

IOAPI parameters:

GDNAMstr

Name of the grid (e.g., ‘12US1’)

GDTYPint

IOAPI numbered grid type (e.g., 2: lambert conformal; 6: polar stereographic)

NCOLSint

number of columns (e.g., 459)

NROWSint

number of rows (e.g., 299)

XORIGfloat

The projected x-coordinate of the bottom left corner of the bottom-most left-most cell in meters (e.g., -2556000.0)

YORIGfloat

The projected y-coordinate of the bottom left corner of the bottom-most left-most cell in meters (e.g., -1728000.0)

XCELLfloat

Width of grid cell in meters (e.g., 12000.)

YCELLfloat

Height of grid cell in meters (e.g., 12000.)

P_ALPfloat

First of three parameters whose meaning depends on GDTYP - GDTYP=2: the first true standard latitude (e.g., 33) - GDTYP=6: either 1 for north pole or -1 for south pole.

P_BETfloat

Second of three parameters whose meaning depends on GDTYP - GDTYP=2: the second true standard latitude (e.g., 45) - GDTYP=6: the secant latitude (i.e., of true scale)

P_GAMfloat

Thrid of three parameters whose meaning depends on GDTYP - GDTYP=2: the central meridian (e.g., -97) - GDTYP=6: the central meridian (e.g., -98)

XCENTfloat

The longitude for the center (0,0) of the projected system. (.e.g, -97.0)

YCENTfloat

The latitude for the center (0,0) of the projected system. (.e.g, 40..0)

VGTYPint

Vertical grid coordinate where 7 terrain following fractional pressure (s=(p-ptop)/(psurf - ptop)) or -9999 is the new WRF hybrid vertical coordinate that transitions to constant pressure at s=0.2

VGTOPfloat

Top of the vertical domain in Pascals (e.g., 5000.)

NLAYSint

Number of vertical layers (e.g., 35)

RSIG regridding options:

earth_radiusfloat

gfloat

Gravitational acceleration in m/s**2 (e.g., 9.81)

Rfloat

Ideal gas constant in J/kg/K (e.g., 287.04)

Afloat

Atmospheric lapse rate in K (e.g., 50.)

T0float

Reference temperature in Kelvin (e.g., 290.)

P0float

Reference pressure in Pascals (e.g., 1000e2)

REGRID_AGGREGATEstr

Options: ‘None’, ‘daily’, ‘all’

REGRIDstr

Options: ‘weighted’ or ‘mean’ weighted uses fractional area weights mean is the simple average of pixels with centroids in the grid

A=50., T0=290, P0=1000e2, REGRID_AGGREGATE=’None’, REGRID=’weighted’