Grid definition - spherical harmonic coefficients (including rotated, stretched, or stretched and rotated)



Octet No.	Contents
7-8	J - pentagonal resolution parameter
9-10	K - pentagonal resolution parameter
11-12	M - pentagonal resolution parameter
13	Representation type (see Code table 9)
14	Representation mode (see Code table 10)
15-32	Set to zero (reserved)
33-35	Latitude of the southern pole in millidegrees (integer) Latitude of pole of stretching in millidegrees (integer)
36-38	Longitude of the southern pole in millidegrees (integer) Longitude of pole of stretching in millidegrees (integer)
39-42	Angle of rotation (represented in the same way as the reference value) Stretching factor (representation as for 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).



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