diff --git a/frame_serialize/JFJochFrameDeserializer.cpp b/frame_serialize/JFJochFrameDeserializer.cpp
index a7c46eb5..b89e3f8f 100644
--- a/frame_serialize/JFJochFrameDeserializer.cpp
+++ b/frame_serialize/JFJochFrameDeserializer.cpp
@@ -472,6 +472,8 @@ void JFJochFrameDeserializer::ProcessStartMessageUserDataElement(CborValue &valu
             start_message.min_value = GetCBORInt(map_value);
         else if (key == "rad_int_bin_number")
             start_message.rad_int_bin_number = GetCBORInt(map_value);
+        else if (key == "rad_int_bin_to_q")
+            GetCBORFloatArray(map_value, start_message.rad_int_bin_to_q);
         else if (key == "summation")
             start_message.summation = GetCBORUInt(map_value);
         else if (key == "storage_cell_number")
diff --git a/frame_serialize/JFJochFrameSerializer.cpp b/frame_serialize/JFJochFrameSerializer.cpp
index 51d59eb8..786a9e98 100644
--- a/frame_serialize/JFJochFrameSerializer.cpp
+++ b/frame_serialize/JFJochFrameSerializer.cpp
@@ -251,7 +251,7 @@ inline void CBOR_ENC_USER_DATA(CborEncoder &encoder, const StartMessage& message
     CborEncoder mapEncoder;
 
     cborErr(cbor_encode_text_stringz(&encoder, "user_data"));
-    cborErr(cbor_encoder_create_map(&encoder, &mapEncoder, 18));
+    cborErr(cbor_encoder_create_map(&encoder, &mapEncoder, 19));
 
     CBOR_ENC(mapEncoder, "file_prefix", message.file_prefix);
     CBOR_ENC(mapEncoder, "sample_name", message.sample_name);
@@ -283,6 +283,7 @@ inline void CBOR_ENC_USER_DATA(CborEncoder &encoder, const StartMessage& message
     CBOR_ENC(mapEncoder, "instrument_name", message.instrument_name);
     CBOR_ENC(mapEncoder, "instrument_name_short", message.instrument_name_short);
     CBOR_ENC(mapEncoder, "rad_int_bin_number", message.rad_int_bin_number);
+    CBOR_ENC(mapEncoder, "rad_int_bin_to_q", message.rad_int_bin_to_q);
     CBOR_ENC(mapEncoder, "summation", message.summation);
     cborErr(cbor_encoder_close_container(&encoder, &mapEncoder));
 }
diff --git a/frame_serialize/StartMessage.h b/frame_serialize/StartMessage.h
index c77330fa..e2a669e3 100644
--- a/frame_serialize/StartMessage.h
+++ b/frame_serialize/StartMessage.h
@@ -77,6 +77,8 @@ struct StartMessage {
 
     uint64_t rad_int_bin_number;
     uint64_t summation;
+
+    std::vector<float> rad_int_bin_to_q;
 };
 
 #endif //JUNGFRAUJOCH_STARTMESSAGE_H
diff --git a/receiver/JFJochReceiver.cpp b/receiver/JFJochReceiver.cpp
index 6201bbce..7b6a8c6b 100644
--- a/receiver/JFJochReceiver.cpp
+++ b/receiver/JFJochReceiver.cpp
@@ -141,9 +141,10 @@ JFJochReceiver::JFJochReceiver(const JFJochProtoBuf::ReceiverInput &settings,
             if (calib)
                 message.pixel_mask["sc0"] = calib->CalculateNexusMask(experiment, 0);
 
-            if (rad_int_mapping)
+            if (rad_int_mapping) {
                 message.rad_int_bin_number = rad_int_mapping->GetBinNumber();
-            else
+                message.rad_int_bin_to_q = rad_int_mapping->GetBinToQ();
+            } else
                 message.rad_int_bin_number = 0;
 
             image_pusher.StartDataCollection(message);
diff --git a/tests/CBORTest.cpp b/tests/CBORTest.cpp
index e82c91a6..29ff78eb 100644
--- a/tests/CBORTest.cpp
+++ b/tests/CBORTest.cpp
@@ -57,7 +57,8 @@ TEST_CASE("CBORSerialize_Start", "[CBOR]") {
             .instrument_name = "X06SA",
             .instrument_name_short = "PXIII",
             .rad_int_bin_number = 35,
-            .summation = 567
+            .summation = 567,
+            .rad_int_bin_to_q = {0.1, 0.2, 0.3, 0.5}
     };
     message.pixel_mask["sc0"] = std::vector<uint32_t>(456*457, 15);
 
@@ -110,6 +111,7 @@ TEST_CASE("CBORSerialize_Start", "[CBOR]") {
     CHECK(output_message.instrument_name_short == message.instrument_name_short);
     CHECK(output_message.rad_int_bin_number == message.rad_int_bin_number);
     CHECK(output_message.summation == message.summation);
+    CHECK(output_message.rad_int_bin_to_q == message.rad_int_bin_to_q);
 
     for (int i = 0; i < 3; i++)
         CHECK(output_message.detector_translation[i] == message.detector_translation[i]);
@@ -119,6 +121,7 @@ TEST_CASE("CBORSerialize_Start", "[CBOR]") {
     REQUIRE(output_message.goniometer.contains("omega"));
     CHECK(output_message.goniometer["omega"].increment == 0.1f);
     CHECK(output_message.goniometer["omega"].start == 10.0f);
+
 }
 
 TEST_CASE("CBORSerialize_End", "[CBOR]") {