diff --git a/scos_actions/actions/acquire_single_freq_fft.py b/scos_actions/actions/acquire_single_freq_fft.py
index d1ec2aba..61769662 100644
--- a/scos_actions/actions/acquire_single_freq_fft.py
+++ b/scos_actions/actions/acquire_single_freq_fft.py
@@ -178,10 +178,6 @@ def execute(self, schedule_entry: dict, task_id: int) -> dict:
         # Save measurement results
         measurement_result["data"] = m4s_result
         measurement_result.update(self.parameters)
-        if self.cal_adjust:
-            measurement_result[
-                "calibration_datetime"
-            ] = self.sensor.signal_analyzer.sensor_calibration_data["datetime"]
         measurement_result["task_id"] = task_id
         measurement_result["classification"] = self.classification
 
diff --git a/scos_actions/actions/acquire_single_freq_tdomain_iq.py b/scos_actions/actions/acquire_single_freq_tdomain_iq.py
index a6d2cf2e..8f359531 100644
--- a/scos_actions/actions/acquire_single_freq_tdomain_iq.py
+++ b/scos_actions/actions/acquire_single_freq_tdomain_iq.py
@@ -89,10 +89,6 @@ def execute(self, schedule_entry: dict, task_id: int) -> dict:
         measurement_result.update(self.parameters)
         measurement_result["end_time"] = end_time
         measurement_result["task_id"] = task_id
-        if self.cal_adjust:
-            measurement_result[
-                "calibration_datetime"
-            ] = self.sensor.signal_analyzer.sensor_calibration_data["datetime"]
         measurement_result["classification"] = self.classification
         sigan_settings = self.get_sigan_settings(measurement_result)
         logger.debug(f"sigan settings:{sigan_settings}")
diff --git a/scos_actions/actions/interfaces/measurement_action.py b/scos_actions/actions/interfaces/measurement_action.py
index 88a0a239..62f8fedd 100644
--- a/scos_actions/actions/interfaces/measurement_action.py
+++ b/scos_actions/actions/interfaces/measurement_action.py
@@ -104,12 +104,6 @@ def create_metadata(
             self.sigmf_builder.set_classification(measurement_result["classification"])
         except KeyError:
             logger.warning(warning_str.format("classification"))
-        try:
-            self.sigmf_builder.set_last_calibration_time(
-                measurement_result["calibration_datetime"]
-            )
-        except KeyError:
-            logger.warning(warning_str.format("calibration_datetime"))
         try:
             cap = measurement_result["capture_segment"]
             logger.debug(f"Adding capture:{cap}")
diff --git a/scos_actions/metadata/sigmf_builder.py b/scos_actions/metadata/sigmf_builder.py
index 2a838d82..e9f6b2fd 100644
--- a/scos_actions/metadata/sigmf_builder.py
+++ b/scos_actions/metadata/sigmf_builder.py
@@ -426,11 +426,6 @@ def add_annotation(self, start_index, length, annotation_md):
             start_index=start_index, length=length, metadata=annotation_md
         )
 
-    def set_last_calibration_time(self, last_cal_time):
-        self.sigmf_md.set_global_field(
-            "ntia-sensor:calibration_datetime", last_cal_time
-        )
-
     def add_to_global(self, key, value):
         self.sigmf_md.set_global_field(key, value)