Options for sensitivity region floater3 location:

 iday:     0
 icent:    1
 lat:      30
 lon:      284
 boxsize:  12.5

 iday     ->   valid time: "0"==>6,5,4,3,2,1; "i":iday, where i!=0;
 icent    ->  "1"==>NCEP; "2"==>CMC, "3"==>ECMWF; "4"==>NCEP+CMC; "5"==>NCEP+ECMWF; "6"==>NCEP+CMC+ECMWF
 lat      ->   center latitude for interesting area
 lon      ->   center longitude for interesting area
 boxsize  ->  "0": region1 and region2; "10": lon: lon-10 to lon+10 & lat: lat-8 to lat+8; "x":rescaling, >10 ==>increase box area by (x/10)^2; <10, decrease box area by (1-x/10)^2