diff --git a/GEOSldas_App/util/inputs/mwRTM_params/Preprocess_L2DCA_mwRTM_params_to_dailymat.m b/GEOSldas_App/util/inputs/mwRTM_params/Preprocess_L2DCA_mwRTM_params_to_dailymat.m
index 061229b..45c39c3 100644
--- a/GEOSldas_App/util/inputs/mwRTM_params/Preprocess_L2DCA_mwRTM_params_to_dailymat.m
+++ b/GEOSldas_App/util/inputs/mwRTM_params/Preprocess_L2DCA_mwRTM_params_to_dailymat.m
@@ -189,7 +189,7 @@
                         % round date_time to nearest 3 hourly UTC
                         utc_t2k = round(double(L2_utc_seconds)/L2_dtstep)*L2_dtstep;
 
-                        [yr, doy, mm, dd, hr, mn] = J2000_to_DateTime( utc_t2k );
+                        [yr, mm, dd, hr, mn, ss, doy, pen] = J2000_to_DateTime( utc_t2k );
 
                         % use points for current UTC day only
                         idx = find(yr == date_time.year & mm == date_time.month & ...
diff --git a/GEOSldas_App/util/shared/matlab/J2000_to_DateTime.m b/GEOSldas_App/util/shared/matlab/J2000_to_DateTime.m
index d2e52d2..48f1319 100644
--- a/GEOSldas_App/util/shared/matlab/J2000_to_DateTime.m
+++ b/GEOSldas_App/util/shared/matlab/J2000_to_DateTime.m
@@ -28,11 +28,12 @@
 % Loop through elements of J2000_seconds for now.  In future, should vectorize 
 %  augment_date_time.m, is_leap_year.m, days_in_month.m, get_dofyr_pentad.m
 
+date_time_base = augment_date_time( round(J2000_seconds(1)), date_time_epoch ); 
+
 for ii = 1:N
  
   % add (rounded) J2000_seconds to date_time_epoch
-
-  date_time = augment_date_time( round(J2000_seconds), date_time_epoch ); 
+  date_time = augment_date_time( round(J2000_seconds(ii)-J2000_seconds(1)), date_time_base ); 
 
   yr( ii) = date_time.year  ;
   mm( ii) = date_time.month ;