1. matlab write in grads in this format :

fid=fopen('compSSTa-Jn_Myap.bin','wb');
a=fwrite(fid,mh,'float32');
a=fwrite(fid,mp,'float32');
fclose(fid);
and mh(i,j)
==
When loading from the data library :
usually y is reversed for : u and v psst runs.