diff --git a/pipelines/params/calibration_factors.yaml b/pipelines/params/calibration_factors.yaml
index b13a2c3..e088c46 100644
--- a/pipelines/params/calibration_factors.yaml
+++ b/pipelines/params/calibration_factors.yaml
@@ -12,14 +12,29 @@ CE_tofware: &CE 1.0
 
 
 # Get values from data/<station>/<year>/cal.csv
-IE_correct: &IE_correct 145.9
-AB_ref_correct: &AB_ref_correct 254000
-RIE_SO4_correct: &RIE_SO4_correct 0.63
-RIE_NH4_correct: &RIE_NH4_correct 3.495
-RIE_Org_correct: &RIE_Org_correct 1.4
-RIE_NO3_correct: &RIE_NO3_correct 1.05
-RIE_Chl_correct: &RIE_Chl_correct 1.0
-CE_correct: &CE_correct 1.0
+calibration_intervals: # Specify datetimes (YYYY-MM-DD HH-MM-SS)
+  inverval_1:
+    start_datetime : '2022-01-16 00-00-00' # date and time where calibration was concluded 
+    end_datetime : '2022-01-16 00-00-00'
+    IE_correct: &IE_correct 145.9
+    AB_ref_correct: &AB_ref_correct 254000
+    RIE_SO4_correct: &RIE_SO4_correct 0.63
+    RIE_NH4_correct: &RIE_NH4_correct 3.495
+    RIE_Org_correct: &RIE_Org_correct 1.4
+    RIE_NO3_correct: &RIE_NO3_correct 1.05
+    RIE_Chl_correct: &RIE_Chl_correct 1.0
+    CE_correct: &CE_correct 1.0
+  inverval_2 : 
+    start_datetime : '2022-06-16 00-00-00'
+    end_datetime : '2022-01-16 00-00-00'
+    IE_correct: &IE_correct 145.9
+    AB_ref_correct: &AB_ref_correct 254000
+    RIE_SO4_correct: &RIE_SO4_correct 0.63
+    RIE_NH4_correct: &RIE_NH4_correct 3.495
+    RIE_Org_correct: &RIE_Org_correct 1.4
+    RIE_NO3_correct: &RIE_NO3_correct 1.05
+    RIE_Chl_correct: &RIE_Chl_correct 1.0
+    CE_correct: &CE_correct 1.0
 
 # Define mappings for associated variables
 variables: