Grid 70: Stretched spherical harmonics coefficients

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)
Notes:

( 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.