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rhomb_trunc

Performs rhomboidal truncation on spherical harmonic coefficients.

Prototype

	procedure rhomb_trunc (
		a  : float or double,  
		b  : float or double,  
		T  : integer           
	)

Arguments

a
b

Spherical harmonic coefficients returned to user by NCL procedures shagc/shaec.

T

Rhomboidal truncation parameter. T is the constant number of total wave numbers to keep.

Description

rhomb_trunc performs rhomboidal truncation on coefficients returned by the Spherepack analysis routines shagc or shaec. The results are returned in the a and b variables.

rhomb_trunc is the procedural version of rhomb_trunC.

See Also

rhomb_trunC, tri_trunc, tri_trunC, shaec, shsec, shagc, shsgc

Examples

Example 1

g(nlat,nlon)

Array space for a and b must be preallocated by the user prior to calling NCL procedures shagc/shaec.

  a  = new ( dimsizes(g), typeof(g))
  b  = new ( dimsizes(g), typeof(g))

  T  = 19
  shaec(g,a,b)
  rhomb_trunc (a,b,T)   
  shsec(a,b,g)