Grid 70: Stretched spherical harmonics coefficients
Grids
| Octets | Key | Type | Content |
| 7-8 | J | unsigned | J pentagonal resolution parameter |
| 9-10 | K | unsigned | K pentagonal resolution parameter |
| 11-12 | M | unsigned | M pentagonal resolution parameter |
| 13 | representationType | codetable | Representation type (see Code table 9) |
| 14 | representationMode | codetable | Representation mode (see Code table 10) |
| 15-32 | Set to zero (reserved) | ||
| 33-35 | latitudeOfStretchingPole | signed | Latitude of the southern pole in millidegrees (integer) |
| 36-38 | longitudeOfStretchingPole | signed | Longitude of the southern pole in millidegrees (integer) |
| 39-42 | stretchingFactor | ibmfloat | Angle of rotation (represented in the same way as the reference value) |
| 43-45 | Latitude of pole of stretching in millidegrees (integer) | ||
| 46-48 | Longitude of pole of stretching in millidegrees (integer) | ||
| 49-52 | Stretching factor (representation as for the reference value) |
( 1) The pentagonal representation of resolution is general. Some common truncations are special cases of the pentagonal one: Triangular M = J = K Rhomboidal K = J + M Trapezoidal K = J, K > M
( 2) The representation type (octet 13) indicates the method used to define the norm.
( 3) The representation mode (octet 14) indicates the order of the coefficients, whether global or hemispheric data are depicted, and the nature of the parameter stored (symmetric or antisymmetric).
( 4) See Notes (6) to (11) under Grid definition latitude/longitude grid (or equidistant cylindrical, or Plate Carrée) page I.2 Bi 8.