earth_radius_mod Module Reference

Determine earth radius and shape. More...

Functions/Subroutines
subroutine, public	earth_radius (IGDTMPL, IGDTLEN, RADIUS, ECCEN_SQUARED)
	Determine earth radius and shape. More...

Detailed Description

Determine earth radius and shape.

Author

Gayno, Kyle Gerheiser

Function/Subroutine Documentation

earth_radius()

subroutine, public earth_radius_mod::earth_radius	(	integer, dimension(igdtlen), intent(in)	IGDTMPL,
		integer, intent(in)	IGDTLEN,
		real, intent(out)	RADIUS,
		real, intent(out)	ECCEN_SQUARED
	)

Determine earth radius and shape.

Determine the radius and shape of the earth from the grib 2 grid definition template array - section 3.

Parameters

[in]	igdtmpl	integer (igdtlen) grid definition template array. Corresponds to the gfldigdtmpl component of the ncep g2 library gridmod data structure. For all map projections recognized by iplib, the entries use by this routine are: 1 shape of earth, section 3, octet 15 2 scale factor of spherical earth radius, octet 16 3 scaled value of radius of spherical earth, octets 17-20 4 scale factor of major axis of elliptical earth, octet 21 5 scaled value of major axis of elliptical earth, octets 22-25 6 scale factor of minor axis of elliptical earth, octet 26 7 scaled value of minor axis of elliptical earth, octets 27-30
[in]	igdtlen	integer number of elements of the grid definition template array. Corresponds to the gfldigdtlen component of the ncep g2 library gridmod data structure.
[out]	radius	real earth radius in meters. For ellipitical earths, this is the semi major axis. See "map projectsions - a working manual" by Snyder (1987) for details.
[out]	eccen_squared	real earth eccentricity squared

Author

Gayno

Date

2015-07-14

Definition at line 40 of file earth_radius_mod.F90.

Referenced by spectral_interp_mod::polates4::polates4_grib2(), and spectral_interp_mod::polatev4::polatev4_grib2().