diff --git a/modules/icing/pirep_goes.py b/modules/icing/pirep_goes.py
index 50b341fcbeb0a050d423db679d893b2f029718d9..2482bdf709d29f786fcec1cc87a16c2f74a196ec 100644
--- a/modules/icing/pirep_goes.py
+++ b/modules/icing/pirep_goes.py
@@ -1024,9 +1024,11 @@ def run_qc(filename, filename_l1b, day_night='ANY', pass_thresh_frac=0.20, cloud
     bt_11um = f_l1b['temp_11_0um_nom'][:, y_a:y_b, x_a:x_b]
 
     if icing:
-        mask, idxs, num_tested = apply_qc_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloud_frac=cloudy_frac)
+        # mask, idxs, num_tested = apply_qc_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloud_frac=cloudy_frac)
+        mask, idxs, num_tested = apply_qc_icing_pireps_exp1(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloud_frac=cloudy_frac)
     else:
-        mask, idxs, num_tested = apply_qc_no_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloudy_frac=cloudy_frac)
+        # mask, idxs, num_tested = apply_qc_no_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloudy_frac=cloudy_frac)
+        mask, idxs, num_tested = apply_qc_icing_pireps_exp1(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, sol_zen, sat_zen, cld_temp, day_night=day_night, cloudy_frac=cloudy_frac)
 
     keep_idxs = []
 
@@ -1290,6 +1292,65 @@ def apply_qc_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd
     return mask, idxs, num_tested
 
 
+def apply_qc_icing_pireps_exp1(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, solzen, satzen, cld_top_temp, day_night='ANY', cloud_frac=0.5):
+
+    if day_night == 'DAY':
+        opd_thick_threshold = 20
+        opd_thin_threshold = 1
+    elif day_night == 'NIGHT' or day_night == 'ANY':
+        opd_thick_threshold = 2
+        opd_thin_threshold = 0.1
+
+    closeness_top = 200.0  # meters
+    max_cld_depth = 1000.0
+    max_altitude = 4000.0
+    max_cld_altitude = 4000.0
+
+    num_obs = len(icing_alt)
+    cld_mask = cld_mask.reshape((num_obs, -1))
+    cld_top_hgt = cld_top_hgt.reshape((num_obs, -1))
+    cld_geo_dz = cld_geo_dz.reshape((num_obs, -1))
+    bt_11um = bt_11um.reshape((num_obs, -1))
+    cld_top_temp = cld_top_temp.reshape((num_obs, -1))
+
+    mask = []
+    idxs = []
+    num_tested = []
+    for i in range(num_obs):
+        if not check_oblique(satzen[i,]):
+            continue
+        if day_night == 'NIGHT' and not is_night(solzen[i,]):
+            continue
+        elif day_night == 'DAY' and not is_day(solzen[i,]):
+            continue
+        elif day_night == 'ANY':
+            pass
+
+        # keep_0 = np.logical_or(cld_mask[i,] == 2, cld_mask[i,] == 3)  # cloudy
+        keep_0 = cld_mask[i, ] == 3  # Confident cloudy
+        keep_1 = np.invert(np.isnan(cld_top_hgt[i,]))
+        keep_2 = np.invert(np.isnan(bt_11um[i,]))
+        keep_3 = np.invert(np.isnan(cld_geo_dz[i,]))
+        keep = keep_0 & keep_1 & keep_2 & keep_3
+        num_keep = np.sum(keep)
+        if num_keep == 0:
+            continue
+        if num_keep / nx_x_ny < cloud_frac:  # At least this fraction cloudy
+            continue
+
+        keep = np.where(keep, (cld_top_hgt[i,] + closeness_top) > icing_alt[i], False)
+
+        keep = np.where(keep, np.logical_and(cld_top_hgt[i,] > icing_alt[i,],
+                                  (cld_top_hgt[i,] - 1000.0) < icing_alt[i,]), False)
+        keep = np.where(keep, np.logical_and(cld_top_temp[i,] > 228.0, cld_top_temp[i,] < 274.0), False)
+
+        mask.append(keep)
+        idxs.append(i)
+        num_tested.append(num_keep)
+
+    return mask, idxs, num_tested
+
+
 def apply_qc_no_icing_pireps(icing_alt, cld_top_hgt, cld_geo_dz, cld_phase, cld_opd, cld_mask, bt_11um, solzen, satzen, cld_top_temp, day_night='ANY', cloudy_frac=0.5):
 
     if day_night == 'DAY':