diff --git a/docs/examples/streaks.ipynb b/docs/examples/streaks.ipynb
index e07dccc..62cdd0b 100644
--- a/docs/examples/streaks.ipynb
+++ b/docs/examples/streaks.ipynb
@@ -55,6 +55,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "xsarsea.windspeed.gmfs.GmfModel.activate_gmfs_impl()\n",
     "xsarsea.windspeed.available_models()"
    ]
   },
diff --git a/src/xsarsea/windspeed/__init__.py b/src/xsarsea/windspeed/__init__.py
index 5754e66..98f808d 100644
--- a/src/xsarsea/windspeed/__init__.py
+++ b/src/xsarsea/windspeed/__init__.py
@@ -2,9 +2,9 @@
 windspeed module, for retrieving wind speed from sigma0 and models.
 """
 __all__ = ['invert_from_model', 'available_models', 'get_model', 'register_cmod7',
-           'register_sarwing_luts', 'register_nc_luts', 'nesz_flattening', 'GmfModel']
+           'register_sarwing_luts', 'register_nc_luts', 'register_luts', 'nesz_flattening', 'GmfModel']
 from .windspeed import invert_from_model
-from .models import available_models, get_model, register_nc_luts
+from .models import available_models, get_model, register_nc_luts, register_luts
 from .sarwing_luts import register_sarwing_luts
 from .cmod7 import register_cmod7
 from .utils import nesz_flattening, get_dsig
diff --git a/src/xsarsea/windspeed/models.py b/src/xsarsea/windspeed/models.py
index 071569c..be41ea5 100644
--- a/src/xsarsea/windspeed/models.py
+++ b/src/xsarsea/windspeed/models.py
@@ -397,7 +397,7 @@ def _raw_lut(self, **kwargs):
         return lut
 
 
-def register_nc_luts(topdir, gmf_names=None, **kwargs):
+def register_nc_luts(topdir, gmf_names=None):
     """
     Register all netcdf luts found under `topdir`.
 
@@ -518,3 +518,32 @@ def get_model(name):
             raise KeyError('model %s not found' % name)
 
     return model
+
+
+def register_luts(topdir=None, topdir_cmod7=None):
+    """
+    Register gmfModel luts and ncLutModel luts
+
+    Parameters
+    ----------
+    topdir: str
+        top dir path to nc luts.
+    
+    topdir_cmod7: str
+        top dir path to cmod7 luts.
+
+    kwargs: dict
+        kwargs to pass to register_nc_luts
+    """
+    
+    # register gmf luts
+    import xsarsea.windspeed as windspeed
+    windspeed.GmfModel.activate_gmfs_impl()
+
+    # register nc luts
+    if topdir != None:
+        register_nc_luts(topdir)
+
+    # register cmod7
+    if topdir_cmod7 != None:
+        windspeed.register_cmod7(topdir_cmod7)