diff --git a/DESCRIPTION b/DESCRIPTION
index ef8705bda5d2cf6233f9d0259bd2d3530bc06a8e..e10e064f7f5e1db420d3e8de431d031b601956ac 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.0.10.11
-Date: 2018-06-29
+Version: 1.0.11.0
+Date: 2018-07-18
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl")),
   person("Charles", "Perrin", role = c("aut", "ths")),
diff --git a/NEWS.rmd b/NEWS.rmd
index fda8b9fc146fb24bd7869f15b574dcef68047a7d..a984602f8683eb929adaaa23bcfa5f58a9827143 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -14,19 +14,39 @@ output:
 
 
 
+### 1.0.11.0 Release Notes (2018-07-18) 
+
+
+#### Deprectated and defunct
+
+- The <code>LatRad</code> argument is now deprecated in <code>PEdaily_Oudin()</code> and replaced by the <code>Lat</code> argument.
+
+
+#### Major user-visible changes
+
+- <code>PEdaily_Oudin()</code> now presents a <code>LatUnit</code> argument which allows to chose the unit of the latitude between radians and degrees.
+
+
+#### Minor user-visible changes
+
+- Several functions of the package were cleant or slightly modified, with no effect on their outputs. 
+
+____________________________________________________________________________________
+
+
 ### 1.0.10.11 Release Notes (2018-06-29) 
 
 
 #### Bug fixes
 
-- Fixed bug in <code>RunModel_GR2M</code>. The function now returns the total precipitation (P) instead of the net rainfall (P1).
+- Fixed bug in <code>RunModel_GR2M()</code>. The function now returns the total precipitation (P) instead of the net rainfall (P1).
 
 
 #### Major user-visible changes
 
-- <code>RunModel_GR2M</code> now returns more explicit precipitation outputs names.
+- <code>RunModel_GR2M()</code> now returns more explicit precipitation outputs names.
 
-- <code>CreateInputsCrit</code> now returns a warning message when the KGE (or KGE') is used with a log transformation on flows.
+- <code>CreateInputsCrit()</code> now returns a warning message when the KGE (or KGE') is used with a log transformation on flows.
 
 - The article reference is corrected.
 
@@ -102,7 +122,7 @@ ________________________________________________________________________________
 
 #### New features
 
-- <code>DataAltiExtrapolation_Valery()</code> and <code>CreateInputsModel()</code> now present a PrecipScale argument which allows rescaling precipitation when it is interpolated on the elevation layers when CemaNeige is used.
+- <code>DataAltiExtrapolation_Valery()</code> and <code>CreateInputsModel()</code> now present a <code>PrecipScale</code> argument which allows rescaling precipitation when it is interpolated on the elevation layers when CemaNeige is used.
 
 
 #### Bug fixes
diff --git a/R/PEdaily_Oudin.R b/R/PEdaily_Oudin.R
index 108616858fd75f9a13dd708069a623639a1d506f..a896a0f79d1783078dc0bb66ee5670063ee7409a 100644
--- a/R/PEdaily_Oudin.R
+++ b/R/PEdaily_Oudin.R
@@ -1,35 +1,66 @@
-PEdaily_Oudin <- function(JD,Temp,LatRad){
-
-    PE_Oudin_D <- rep(NA,length(Temp));
-    for(k in 1:length(Temp)){
-
-      FI <- LatRad  ### latitude in rad
-      ### FI <- LatDeg/(180/pi)  ### conversion from deg to rad
-      COSFI <- cos(FI)
-      AFI <- abs(LatRad/42.)
-     
-      TETA <- 0.4093*sin(JD[k]/58.1-1.405)
-      COSTETA <- cos(TETA)
-      COSGZ <- max(0.001,cos(FI-TETA))
-      GZ <- acos(COSGZ)
-      COSGZ2 <- COSGZ*COSGZ
-      if(COSGZ2 >= 1){ SINGZ <- 0. } else { SINGZ <- sqrt(1.-COSGZ2) }
-      COSOM <- 1.-COSGZ/COSFI/COSTETA
-      if(COSOM < -1.){ COSOM <- -1. }
-      if(COSOM >  1.){ COSOM <-  1. }
-      COSOM2 <- COSOM*COSOM
-      if(COSOM2 >= 1.){ SINOM <- 0. } else { SINOM <- sqrt(1.-COSOM2) }
-      OM <- acos(COSOM)
-      COSPZ <- COSGZ+COSFI*COSTETA*(SINOM/OM-1.)
-      if(COSPZ < 0.001){ COSPZ <- 0.001 }
-      ETA <- 1.+cos(JD[k]/58.1)/30.
-      GE <- 446.*OM*COSPZ*ETA
-      
-      if(Temp[k] >= -5.0) { PE_Oudin_D[k] <- GE*(Temp[k]+5.)/100./28.5 } else { PE_Oudin_D[k] <- 0 }
-
+PEdaily_Oudin <- function(JD, Temp, LatRad, Lat, LatUnit = c("rad", "deg")) {
+  
+  if (!missing(LatRad)) {
+    warning("Deprecated \"LatRad\" argument. Please, use \"Lat\" instead.")
+    if (missing(Lat)) {
+      Lat <- LatRad
     }
-
-    return(PE_Oudin_D);
-
+  }
+  
+  PE_Oudin_D <- rep(NA, length(Temp))
+  
+  if (LatUnit[1L] == "rad") {
+    FI <- Lat
+  }
+  if (LatUnit[1L] == "deg") {
+    FI <- Lat / (180 / pi)
+  }
+  
+  COSFI <- cos(FI)
+  AFI <- abs(FI / 42) 
+  
+  for (k in seq_along(Temp)) {
+    
+    TETA <- 0.4093 * sin(JD[k] / 58.1 - 1.405)
+    COSTETA <- cos(TETA)
+    COSGZ <- max(0.001, cos(FI - TETA))
+    GZ <- acos(COSGZ)
+    COSOM <- 1 - COSGZ / COSFI / COSTETA
+    
+    if (COSOM < -1) {
+      COSOM <- -1
+    }
+    if (COSOM > 1) {
+      COSOM <-  1
+    }
+    
+    COSOM2 <- COSOM * COSOM
+    
+    if (COSOM2 >= 1) {
+      SINOM <- 0
+    } else {
+      SINOM <- sqrt(1 - COSOM2)
+    }
+    
+    OM <- acos(COSOM)
+    COSPZ <- COSGZ + COSFI * COSTETA * (SINOM/OM - 1)
+    
+    if (COSPZ < 0.001) {
+      COSPZ <- 0.001
+    }
+    
+    ETA <- 1 + cos(JD[k] / 58.1) / 30
+    GE <- 446 * OM * COSPZ * ETA
+    
+    if (Temp[k] >= -5.0) {
+      PE_Oudin_D[k] <- GE * (Temp[k] + 5) / 100 / 28.5
+    } else {
+      PE_Oudin_D[k] <- 0
+    }
+    
+  }
+  
+  return(PE_Oudin_D)
+  
 }