diff --git a/tests/run_wgrib2_tests.sh b/tests/run_wgrib2_tests.sh
index fbabce13..7dde2e92 100755
--- a/tests/run_wgrib2_tests.sh
+++ b/tests/run_wgrib2_tests.sh
@@ -112,5 +112,18 @@ echo "*** Testing write/read section"
 touch secs.txt
 diff -w secs.txt simple.txt 
 
+
+echo "*** test pdt 48 ***"
+n=`../wgrib2/wgrib2 ./data/gdas.t12z.pgrb2.1p00.anl.75r.grib2 -d 1 -set_pdt +48  -set_byte 4 12 00:12:0 | grep -c "aerosol_size"`
+if [ "$n" -ne 1 ] ; then
+ exit 1
+fi
+set -x
+echo "*** test pdt 49 ***"
+n=`../wgrib2/wgrib2 ./data/gdas.t12z.pgrb2.1p00.anl.75r.grib2 -d 1 -set_pdt +49  -set_byte 4 12 00:12:0 | grep -c "aerosol_size"`
+if [ "$n" -ne 1 ] ; then
+ exit 1
+fi
+
 echo "*** SUCCESS!"
 exit 0
diff --git a/wgrib2/Aerosol.c b/wgrib2/Aerosol.c
index 3ddf45be..9a458052 100644
--- a/wgrib2/Aerosol.c
+++ b/wgrib2/Aerosol.c
@@ -6,6 +6,7 @@
 
 /*
  * 2/2012 Public Domain: Wesley Ebisuzaki
+ * 10/2024               fix to handle all pdts Wesley Ebisuzaki
  */
 
 /*
@@ -13,24 +14,19 @@
  */
 
 int f_aerosol_size(ARG0) {
-    int pdt, type;
-    unsigned char *sec4;
+    unsigned char *ptr;
     double size1, size2;
-
+   
     if (mode >= 0) {
-	pdt = code_table_4_0(sec);
-	if (pdt < 44 || pdt > 48) return 0;
-	type = code_table_4_91(sec);
-	if (type == 255) return 0;
-        sec4 = sec[4];
-
-	size1 = scaled2dbl(INT1(sec4[14]), int4(sec4+15));
-	size2 = scaled2dbl(INT1(sec4[19]), int4(sec4+20));
+        ptr = code_table_4_91_location(sec);
+	if (ptr == NULL) return 0;
+	if (*ptr == 255) return 0;
+	size1 = scaled2dbl(INT1(ptr[1]), int4(ptr+2));
+	size2 = scaled2dbl(INT1(ptr[6]), int4(ptr+7));
 
 	sprintf(inv_out,"aerosol_size ");
 	inv_out += strlen(inv_out);
-	type = code_table_4_91(sec);
-        prt_code_table_4_91(type, size1, size2, inv_out);
+        prt_code_table_4_91(ptr[0], size1, size2, inv_out);
 
     }
     return 0;
@@ -40,23 +36,19 @@ int f_aerosol_size(ARG0) {
  */
 
 int f_aerosol_wavelength(ARG0) {
-    int pdt, type;
-    unsigned char *sec4;
+    unsigned char *ptr;
     double wave1, wave2;
 
     if (mode >= 0) {
-        pdt = code_table_4_0(sec);
-        if (pdt != 48) return 0;
-	type = code_table_4_91b(sec);
-	if (type == 255) return 0;
-        sec4 = sec[4];
-
-        wave1 = scaled2dbl(INT1(sec4[25]), int4(sec4+26));
-        wave2 = scaled2dbl(INT1(sec4[30]), int4(sec4+31));
+        ptr = code_table_4_91b_location(sec);
+	if (ptr == NULL) return 0;
+	if (*ptr == 255) return 0;
+	wave1 = scaled2dbl(INT1(ptr[1]), int4(ptr+2));
+	wave2 = scaled2dbl(INT1(ptr[6]), int4(ptr+7));
 
         sprintf(inv_out,"aerosol_wavelength ");
         inv_out += strlen(inv_out);
-        prt_code_table_4_91(type, wave1, wave2, inv_out);
+        prt_code_table_4_91(ptr[0], wave1, wave2, inv_out);
 
     }
     return 0;
diff --git a/wgrib2/ExtName.c b/wgrib2/ExtName.c
index 19850e88..af5b4390 100644
--- a/wgrib2/ExtName.c
+++ b/wgrib2/ExtName.c
@@ -188,9 +188,8 @@ int f_misc(ARG0) {
 	strcat(inv_out,":");
 	inv_out += strlen(inv_out);
     }
-    if (pdt == 48) {
+    if (pdt == 48 || pdt == 49) {	/* aerosol with optical properties */
         f_aerosol_size(call_ARG0(inv_out,NULL));
-        strcat(inv_out,":");
 	inv_out += strlen(inv_out);
         f_aerosol_wavelength(call_ARG0(inv_out,NULL));
         strcat(inv_out,":");