diff --git a/pyglider/ncprocess.py b/pyglider/ncprocess.py
index 1d57b67..c78e0d0 100644
--- a/pyglider/ncprocess.py
+++ b/pyglider/ncprocess.py
@@ -115,7 +115,7 @@ def extract_timeseries_profiles(inname, outdir, deploymentyaml):
                 timecalendar = 'gregorian'
                 dss.to_netcdf(outname, encoding={'time': {'units': timeunits,
                                                           'calendar': timecalendar},
-                                                          'profile_time': 
+                                                          'profile_time':
                                                          {'units': timeunits}})
 
                 # add traj_strlen using bare ntcdf to make IOOS happy
@@ -123,7 +123,7 @@ def extract_timeseries_profiles(inname, outdir, deploymentyaml):
                     nc.renameDimension('string%d' % trajlen, 'traj_strlen')
 
 
-def make_gridfiles(inname, outdir, deploymentyaml, dz=1):
+def make_gridfiles(inname, outdir, deploymentyaml, *, fnamesuffix='', dz=1):
     """
     Turn a timeseries netCDF file into a vertically gridded netCDF.
 
@@ -241,7 +241,7 @@ def make_gridfiles(inname, outdir, deploymentyaml, dz=1):
                             'water_velocity_northward'])
     dsout.attrs = ds.attrs
 
-    outname = outdir + '/' + ds.attrs['deployment_name'] + '_grid.nc'
+    outname = outdir + '/' + ds.attrs['deployment_name'] + '_grid' + fnamesuffix + '.nc'
     _log.info('Writing %s', outname)
     timeunits = 'seconds since 1970-01-01T00:00:00Z'
     dsout.to_netcdf(outname, encoding={'time': {'units': timeunits}})
diff --git a/pyglider/seaexplorer.py b/pyglider/seaexplorer.py
index 2c98c41..21b3918 100644
--- a/pyglider/seaexplorer.py
+++ b/pyglider/seaexplorer.py
@@ -288,7 +288,8 @@ def _interp_pld_to_pld(pld, ds, val, indctd):
 
 
 def raw_to_timeseries(indir, outdir, deploymentyaml, kind='raw',
-                      profile_filt_time=100, profile_min_time=300):
+                      profile_filt_time=100, profile_min_time=300,
+                      fnamesuffix=''):
     """
     A little different than above, for the 4-file version of the data set.
     """
@@ -455,7 +456,7 @@ def raw_to_timeseries(indir, outdir, deploymentyaml, kind='raw',
     except:
         pass
     id0 = ds.attrs['deployment_name']
-    outname = outdir + id0 + '.nc'
+    outname = outdir + id0 + fnamesuffix + '.nc'
     _log.info('writing %s', outname)
     if 'units' in ds.time.attrs.keys():
         ds.time.attrs.pop('units')
diff --git a/pyglider/slocum.py b/pyglider/slocum.py
index d279b43..a1e675a 100644
--- a/pyglider/slocum.py
+++ b/pyglider/slocum.py
@@ -789,8 +789,9 @@ def raw_to_timeseries(indir, outdir, deploymentyaml, *,
 
 
 def binary_to_timeseries(indir, cachedir, outdir, deploymentyaml, *,
-                         search='*.[D|E]BD', time_base='sci_water_temp',
-                         profile_filt_time=100, profile_min_time=300):
+                         search='*.[D|E]BD', fnamesuffix='',
+                         time_base='sci_water_temp', profile_filt_time=100,
+                         profile_min_time=300):
     """
     Convert directly from binary files to netcdf timeseries file.  Requires
     dbdreader to be installed.
@@ -934,7 +935,7 @@ def binary_to_timeseries(indir, cachedir, outdir, deploymentyaml, *,
         os.mkdir(outdir)
     except:
         pass
-    outname = (outdir + '/' + ds.attrs['deployment_name'] + '.nc')
+    outname = (outdir + '/' + ds.attrs['deployment_name'] + fnamesuffix + '.nc')
     _log.info('writing %s', outname)
     ds.to_netcdf(outname, 'w',
                  encoding={'time': {'units': 'seconds since 1970-01-01T00:00:00Z'}})