diff --git a/modules/util/viirs_l1b_l2.py b/modules/util/viirs_l1b_l2.py
index 7f1c0b8d38e969c1d9efb302ceb69006c3e5a806..d6118919d77190911af42b5a56eba97a8700d72f 100644
--- a/modules/util/viirs_l1b_l2.py
+++ b/modules/util/viirs_l1b_l2.py
@@ -125,6 +125,27 @@ def run(l1b_h5f, l2_h5f, l1b_tiles, l2_tiles, factor=2):
     #         img_tiles.append(nda)
 
 
+# def hack():
+#     l1b_nda = np.load('/Users/tomrink/data/viirs_clavrx/l1b_all.npy')
+#     l2_nda = np.load('/Users/tomrink/data/viirs_clavrx/l2_all.npy')
+#
+#     num_samples = l1b_nda.shape[0]
+#     idxs = np.arange(num_samples)
+#     vld_idxs = idxs[::10]
+#     trn_idxs = idxs[np.in1d(idxs, vld_idxs, invert=True)]
+#
+#     l1b_trn = l1b_nda[trn_idxs]
+#     l2_trn = l2_nda[trn_idxs]
+#     l1b_vld = l1b_nda[vld_idxs]
+#     l2_vld = l2_nda[vld_idxs]
+#
+#     print(l1b_trn.shape, l2_trn.shape, l1b_vld.shape, l2_vld.shape)
+#
+#     np.save('/Users/tomrink/data/viirs_clavrx/l1b_all_trn.npy', l1b_trn)
+#     np.save('/Users/tomrink/data/viirs_clavrx/l1b_all_vld.npy', l1b_vld)
+#     np.save('/Users/tomrink/data/viirs_clavrx/l2_all_trn.npy', l2_trn)
+#     np.save('/Users/tomrink/data/viirs_clavrx/l2_all_vld.npy', l2_vld)
+
 # def run_mean_std(directory):
 #
 #     data_dct = {name: [] for name in mod_res_params}