Section 5 - Template 51 : Spherical harmonics data - complex packing
Templates for Section 5
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| Octets | Key | Type | Content |
| 12-20 | Same as Data Representation Template 5.50 | ||
| 21-24 | laplacianScalingFactor | signed | P - Laplacian scaling factor (expressed in 10-6 units) |
| 25-26 | JS | unsigned | JS - pentagonal resolution parameter of the unpacked subset (see Note 1) |
| 27-28 | KS | unsigned | KS - pentagonal resolution parameter of the unpacked subset (see Note 1) |
| 29-30 | MS | unsigned | MS - pentagonal resolution parameter of the unpacked subset (see Note 1) |
| 31-34 | TS | unsigned | TS - total number of values in the unpacked subset (see Note 1) |
| 35 | unpackedSubsetPrecision | codetable | Precision of the unpacked subset (see Code Table 5.7) |
( 1) The unpacked subset is a set of values defined in the same way as the full set of values (on a spectrum limited to JS , KS and MS), but on which scaling and packing are not applied. Associated values are stored in octets 6 onwards of Section 7.
( 2) The remaining coefficients are multiplied by (n*(n+1))P, scaled and packed. The operator associated with this multiplication is derived from the laplacian operator on the sphere.
( 3) The retrieval formula for a coefficient of wave number n is then: Y = (R+X*2E)*10-D* (n*(n+1))-P where X is the packed scaled value associated with the coefficient