mirror of https://github.com/ecmwf/eccodes.git
12 lines
494 B
Plaintext
12 lines
494 B
Plaintext
# Code Table 3.7: Spectral data representation mode
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0 0 Reserved
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1 1 The complex numbers Fnm (see code figure 1 in Code Table 3.6 above) are stored for m³0 as pairs of real numbers Re(Fnm), Im(Fnm) ordered with n increasing from m to N(m), first for m=0 and then for m=1, 2, ... M. (see Note 1)
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# 2-254 Reserved
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255 255 Missing
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# Note:
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#
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#(1) Values of N(m) for common truncations cases:
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# Triangular M = J = K, N(m) = J
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# Rhomboidal K = J + M, N(m) = J+m
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# Trapezoidal K = J, K > M, N(m) = J
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