diff --git a/pre/regrid.pl b/pre/regrid.pl
index d996425..e5a3f30 100755
--- a/pre/regrid.pl
+++ b/pre/regrid.pl
@@ -85,7 +85,7 @@
 $imo{"f"} = "2880"; $jmo{"f"} = "1440";    # OSTIA
 $imo{"CS"} = 1;                            # OSTIA cubed-sphere
 
-foreach (qw/ 90 180 270 360 540 720 1080 1440 2160 2880 5760 /) {
+foreach (qw/ 90 180 270 360 540 720 1080 1440 1536 2160 2880 5760 /) {
     $CSo{"C$_"} = $_;
     $imo{"C$_"} = $_;
     $jmo{"C$_"} = 6*$_;
@@ -109,7 +109,7 @@
 
 # atmosphere cubed-sphere grids
 #------------------------------
-foreach (qw/ 12 24 48 90 180 270 360 540 720 1080 1440 2160 2880 5760 /) {
+foreach (qw/ 12 24 48 90 180 270 360 540 720 1080 1440 1536 2160 2880 5760 /) {
     $CS{"C$_"} = $_;
     $im{"C$_"} = $_;
     $jm{"C$_"} = 6*$_;
@@ -139,6 +139,7 @@
           "C720"  => "e",
           "C1080" => "e",
           "C1440" => "e",
+          "C1536" => "e",
           "C2160" => "e",
           "C2880" => "e",
           "C5760" => "e" );
@@ -701,8 +702,8 @@ sub check_inputs {
         .    "a = 4 deg           C12     C180     C1000      C270  - 13km to 100km \n"
         .    "b = 2 deg           C24     C360     C1440      C540  -  7km to  50km \n"
         .    "c = 1 deg           C48     C500     C2880      C1080 -  3km to  25km \n"
-        .    "d = 1/2 deg         C90     C720     C5760      C2160 -  1km to  12km \n"
-        .    "e = 1/4 deg\n\n");
+        .    "d = 1/2 deg         C90     C720     C5760      C1536 -  2km to  18km \n"
+        .    "e = 1/4 deg                                     C2160 -  1km to  12km \n\n");
 
     print "FVCORE: $fvrst\n"
         . "Getting atmosphere grid resolution from INPUT fvcore file ... ";
@@ -2135,6 +2136,18 @@ sub set_IN_OUT {
         elsif ($atmosID2 eq "270x1620") {
             $bcsdir = "/discover/nobackup/projects/gmao/osse2/stage/BCS_FILES/CF0270x6C_CF0270x6C";
         }
+        elsif ($atmosID2 eq "540x3240") {
+            $bcsdir = "/discover/nobackup/projects/gmao/osse2/stage/BCS_FILES/CF0540x6C_CF0540x6C";
+        }
+        elsif ($atmosID2 eq "1080x6480") {
+            $bcsdir = "/discover/nobackup/projects/gmao/osse2/stage/BCS_FILES/CF1080x6C_CF1080x6C";
+        }
+        elsif ($atmosID2 eq "1536x7680") {
+            $bcsdir = "/discover/nobackup/projects/gmao/osse2/stage/BCS_FILES/CF1536x6C_CF1536x6C";
+        }
+        elsif ($atmosID2 eq "2160x12960") {
+            $bcsdir = "/discover/nobackup/projects/gmao/osse2/stage/BCS_FILES/CF2160x6C_CF2160x6C";
+        }
         elsif ($rank{$bcsTAG} >= $rank{"Icarus-NLv3_Reynolds"}) {
             $bcsdir = "$bcsHEAD/Icarus-NLv3/$bcsTAG/$gridID";
         }
@@ -2421,6 +2434,7 @@ sub regrid_upperair_rsts_CS {
     elsif ($im eq  "720") { $NPE = 192; $nwrit = 2 }
     elsif ($im eq "1080") { $NPE = 384; $nwrit = 2 }
     elsif ($im eq "1440") { $NPE = 576; $nwrit = 2 }
+    elsif ($im eq "1536") { $NPE = 576; $nwrit = 2 }
     elsif ($im eq "2160") { $NPE = 768; $nwrit = 2 }
     elsif ($im eq "2880") { $NPE = 5400; $nwrit = 6 }
     elsif ($im eq "5760") { $NPE = 5400; $nwrit = 6 }
@@ -2543,7 +2557,7 @@ sub regrid_upperair_rsts_CS {
        $target_lat = 39.5;
        $target_lon = -98.35;
        $stretch_fac = 2.5;
-    } elsif ( ($im eq 1536)) {
+    } elsif ( ($im eq "1536") ) {
        $stretched_grid = 1;
        $target_lat = 39.5;
        $target_lon = -98.35;