diff --git a/scripts/input_data_prep/merge_omni_data.py b/scripts/input_data_prep/merge_omni_data.py
index 2090ae1..6221b15 100644
--- a/scripts/input_data_prep/merge_omni_data.py
+++ b/scripts/input_data_prep/merge_omni_data.py
@@ -8,6 +8,7 @@
 
 from pyfiglet import Figlet
 from termcolor import colored
+from tqdm import tqdm
 
 import pandas as pd
 import os
@@ -32,37 +33,43 @@ def merge_omni():
     parser = argparse.ArgumentParser(description='Merging Omniweb Data', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 
     parser.add_argument('--input_dir', type=str, default='../../data/omniweb_data', help='Input directory of Omniweb data')
-    parser.add_argument('--output_dir', type=str, default='../../data/merged_datasets', help='Output directory of processed data')
 
     opt = parser.parse_args()
 
-    #create output directory if it does not exist
-    os.makedirs(opt.output_dir, exist_ok=True)
-
     filenames=os.listdir(opt.input_dir)
     filenames_magnetic_field=[os.path.join(opt.input_dir,f) for f in filenames if f.endswith('.csv') and f.startswith('magnetic_field')]
     filenames_solar_wind=[os.path.join(opt.input_dir,f) for f in filenames if f.endswith('.csv') and f.startswith('solar_wind')]
     filenames_indices=[os.path.join(opt.input_dir,f) for f in filenames if f.endswith('.csv') and f.startswith('indices')]
+    #first check if it exists:
+    if os.path.exists(os.path.join(opt.input_dir,'merged_omni_magnetic_field.csv')):
+        print('merged_merged_omni_magnetic_field.csv already exists, skipping')
+    else:
+        final_df_magnetic_field=create_df(filenames_magnetic_field)
+        final_df_magnetic_field.sort_values('all__dates_datetime__',inplace=True)
+        file_path=os.path.join(opt.input_dir,'merged_omni_magnetic_field.csv')
+        final_df_magnetic_field.to_csv(file_path,index=False)
+        print(f' OMNI magnetic field merged dataframe created at: {file_path}')
+        del final_df_magnetic_field
+    #first check if it exists:
+    if os.path.exists(os.path.join(opt.input_dir,'merged_omni_solar_wind.csv')):
+        print('merged_omni_solar_wind.csv already exists, skipping')
+    else:    
+        final_df_solar_wind=create_df(filenames_solar_wind)
+        final_df_solar_wind.sort_values('all__dates_datetime__',inplace=True)
+        file_path=os.path.join(opt.input_dir,'merged_omni_solar_wind.csv')
+        final_df_solar_wind.to_csv(file_path,index=False)
+        print(f' OMNI Solar Wind merged dataframe created at: {file_path}')
+        del final_df_solar_wind
 
-    final_df_magnetic_field=create_df(filenames_magnetic_field)
-    final_df_magnetic_field.sort_values('all__dates_datetime__',inplace=True)
-    file_path=os.path.join(opt.input_dir,'merged_omni_magnetic_field.csv')
-    final_df_magnetic_field.to_csv(file_path,index=False)
-    print(f' OMNI magnetic field merged dataframe created at: {file_path}')
-    del final_df_magnetic_field
-
-    final_df_solar_wind=create_df(filenames_solar_wind)
-    final_df_solar_wind.sort_values('all__dates_datetime__',inplace=True)
-    file_path=os.path.join(opt.input_dir,'merged_omni_solar_wind.csv')
-    final_df_solar_wind.to_csv(file_path,index=False)
-    print(f' OMNI Solar Wind merged dataframe created at: {file_path}')
-    del final_df_solar_wind
-
+    #first check if it exists:
+    if os.path.exists(os.path.join(opt.input_dir,'merged_omni_indices.csv')):
+        print('merged_omni_solar_wind.csv already exists, skipping')
+    else:    
 
-    final_df_indices=create_df(filenames_indices)
-    final_df_indices.sort_values('all__dates_datetime__',inplace=True)
-    file_path=opt.path.join(opt.output_dir,'merged_omni_indices.csv')
-    final_df_indices.to_csv(file_path,index=False)
+        final_df_indices=create_df(filenames_indices)
+        final_df_indices.sort_values('all__dates_datetime__',inplace=True)
+        file_path=os.path.join(opt.input_dir,'merged_omni_indices.csv')
+        final_df_indices.to_csv(file_path,index=False)
     print(f' OMNI Indices merged dataframe created at: {file_path}')
 
 if __name__ == "__main__":