This procedure defines the two corners (SW and NE) of a subgrid Aladin, given :

• the native grid parameters,
• the approximative SW subgrid corner (in degrees) : ZLONU & ZLATU
• the number of points of the subgrid (for C+I) : IDLUXU & IDGUXU

The files location is on andante: /u/mrpm/mrpm602/subgrid

example : see namelist namex and run "subgrid namex"
Alternatively, if the namelist parameter LLDIAG is set to .TRUE., the
procedure will only print out the SW-NE diagonal of the native grid.

Namelist namex :

&NAMEL

IDLUX=277,

IDGUX=277,

IDLON=288,

IDGL=288,

ISOTRP=1,

IGIV0=0,

IROTEQ=0,

ZLAT0=46.46884918,

ZLON0=2.57831001,

ZRPK=0.725,

ZLON1=-11.83971936,

ZLAT1=33.14368563,

ZLON2=25.05760447,

ZLAT2=56.95716059,

ZLONU=-11.59,

ZLATU=33.43,

IDLUXU=300,

IDGUXU=300,

LLDIAG=.T.,

/