diff --git a/modules/deeplearning/cloud_opd_fcn_abi.py b/modules/deeplearning/cloud_opd_fcn_abi.py
index 9a0111ccfc61f378341ba1c1c2306e744428d2ae..63a0ef18722e0857360d2ad2463a9248a56f241e 100644
--- a/modules/deeplearning/cloud_opd_fcn_abi.py
+++ b/modules/deeplearning/cloud_opd_fcn_abi.py
@@ -859,7 +859,7 @@ class SRCNN:
 
         cldy_frac_opd = self.run_inference_(bt, refl, refl_lo, refl_hi, refl_std, cp, opd)
 
-        cldy_frac_opd_out = np.zeros((y_len, x_len), dtype=np.float32)
+        cldy_frac_opd_out = np.full((y_len, x_len), -1.0, dtype=np.float32)
         border = int((KERNEL_SIZE - 1) / 2)
         cldy_frac_opd_out[border:y_len - border, border:x_len - border] = cldy_frac_opd[0, :, :, 0]
 
@@ -928,7 +928,7 @@ class SRCNN:
         t1 = time.time()
         print('   inference time: ', (t1-t0))
 
-        cldy_frac_opd_out = np.zeros((y_len, x_len), dtype=np.float32)
+        cldy_frac_opd_out = np.full((y_len, x_len), -1.0, dtype=np.float32)
         border = int((KERNEL_SIZE - 1) / 2)
         cldy_frac_opd_out[border:h_y_len, border:x_len - border] = cldy_frac_opd_nh[0, :, :, 0]
         cldy_frac_opd_out[h_y_len:y_len - border, border:x_len - border] = cldy_frac_opd_sh[0, :, :, 0]