diff --git a/R/PEdaily_Oudin.R b/R/PEdaily_Oudin.R
index 7689fd5b22f3ccde884131cf3825b6df09cd5b60..c677966407f1255b33aa3d128c3d8d1d0f415034 100644
--- a/R/PEdaily_Oudin.R
+++ b/R/PEdaily_Oudin.R
@@ -28,9 +28,9 @@ PEdaily_Oudin <- function(JD, Temp, LatRad, Lat, LatUnit = c("rad", "deg"), run_
   if (!any(LatUnit %in% c("rad", "deg"))) {
     stop("'LatUnit' must be one of \"rad\" or \"deg\"")
   }
-  if (!inherits(Lat, "numeric") | length(Lat) != 1) {
-    stop("'Lat' must be a 'numeric' of length one")
-  }
+  # if (!inherits(Lat, "numeric") | length(Lat) != 1) {
+  #   stop("'Lat' must be a 'numeric' of length one")
+  # }
   if (LatUnit[1L] == "rad" & ((Lat >= pi/2) | (Lat <= -pi/2))) {
     stop("'Lat' must be comprised between -pi/2 and +pi/2 degrees")
   }
@@ -55,12 +55,17 @@ PEdaily_Oudin <- function(JD, Temp, LatRad, Lat, LatUnit = c("rad", "deg"), run_
     if (LatUnit[1L] == "rad") {
       Lat = Lat * 180 / pi
     }
+    
     LInputs = as.integer(length(Temp))
     
+    if (length(Lat) == 1) {
+      Lat = rep(Lat, LInputs)
+    }
+    
     RESULTS <- .Fortran("frun_etp_oudin", PACKAGE="airGR",
                         ##inputs
                         LInputs = LInputs,
-                        xLAT = as.double(Lat),
+                        InputsLAT = as.double(Lat),
                         InputsTT = as.double(Temp),
                         InputsJJ = as.double(JD),
                         ##outputs                                                               
diff --git a/src/frun_ETP.f90 b/src/frun_ETP.f90
index 2fbb5fdc47794cafc683f4b0ad42919b90df9758..c0c6f20ddf9dd5936066c43ab5b9ef34ae9e09d0 100644
--- a/src/frun_ETP.f90
+++ b/src/frun_ETP.f90
@@ -1,5 +1,5 @@
 !*******************************************************************************
-      SUBROUTINE frun_etp_oudin(LInputs,LAT,InputsTT,InputsJJ,OutputsETP)
+      SUBROUTINE frun_etp_oudin(LInputs,InputsLAT,InputsTT,InputsJJ,OutputsETP)
 !*******************************************************************************
 
       !DEC$ ATTRIBUTES DLLEXPORT :: frun_etp_oudin
@@ -9,7 +9,7 @@
       !! dummies
       ! in
       integer, intent(in) :: LInputs
-      doubleprecision, intent(in) :: LAT
+      doubleprecision, dimension(LInputs), intent(in) :: InputsLAT
       doubleprecision, dimension(LInputs), intent(in) :: InputsTT
       doubleprecision, dimension(LInputs), intent(in) :: InputsJJ
       
@@ -20,14 +20,13 @@
       integer :: k
       real :: FI, tt, jj, ETPoud
       
-      FI = LAT / 57.296
-      
       !--------------------------------------------------------------
       ! Time loop
       !--------------------------------------------------------------
       DO k=1,LInputs
         tt = InputsTT(k)
         jj = InputsJJ(k)
+        FI = InputsLAT(k) / 57.296
         !model run on one time step
         CALL ETP_OUDIN(FI,tt,jj,ETPoud)
         !storage of outputs