GRIB2 - TABLE 3.7

SPECTRAL DATA REPRESENTATION MODE

Created 05/11/2005


Code Figure Meaning
0
Reserved
1
The complex numbers Fnm (See Code Table 3.6) are stored for M>=0 as pairs of real numbers Re(Fnm), lm(Fnm) ordered with n increasing from m to N(m), first for m=0 and then for m=1, 2, ... M (see note below).
2-254
Reserved
255
A grid definition does not apply to this product.


Notes:

1.  Values of N(m) for common truncation cases are as follows:

Triangular:     M = J = K,        N(m) = J
Rhomboidal:  K = J + M,        N(m) = J + m
Trapezoidal:   K = J, K > M,   N(m) = J

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