diff --git a/raptor_eagle_ccd.cpp b/raptor_eagle_ccd.cpp
index 5049414..7e0181a 100644
--- a/raptor_eagle_ccd.cpp
+++ b/raptor_eagle_ccd.cpp
@@ -784,11 +784,14 @@ void RaptorEagleCCD::startAquisition()
         .binY = (*this)[CAMERA_ATTR_YBIN],
         .readRate = (*this)[CAMERA_ATTR_READ_RATE],
         .readMode = (*this)[CAMERA_ATTR_READ_MODE],
+        .ccdTemp = (*this)[CAMERA_ATTR_CCD_TEMP],
+        .tecSetPoint = (*this)[CAMERA_ATTR_TECPOINT],
+        .tecState = (*this)[CAMERA_ATTR_TECSTATE] == CAMERA_ATTR_TECSTATE_ON ? true : false,
+        .pcbTemp = (*this)[CAMERA_ATTR_PCB_TEMP],
         .filename = (*this)[CAMERA_ATTR_FITS_FILENAME],
         .templateFilename = (*this)[CAMERA_ATTR_FITS_TEMPLATE],
         .permanentKeywords = _permanentFitsKeywords,        // copy
         .currentKeywords = std::move(_currentFitsKeywords)  // move!!!
-
     }));
 
     // arm grabber
diff --git a/raptor_eagle_ccd.h b/raptor_eagle_ccd.h
index 6d72ec5..9ef0d3f 100644
--- a/raptor_eagle_ccd.h
+++ b/raptor_eagle_ccd.h
@@ -9,6 +9,7 @@
 
 #include <xcliball.h>
 #include <future>
+#include <list>
 
 #include "raptor_eagle_exception.h"
 
@@ -29,6 +30,8 @@ public:
     // separator char sequence of serialized representation of user FITS keywords array
     static constexpr std::string_view USER_FITS_KEY_SEP_SEQ{"\n"};
 
+    static constexpr size_t DEFAULT_ACQ_RING_BUFFER_SIZE = 3;
+
     /*  some Eagle V camera constants   */
     // static constexpr double EAGLE_CAMERA_MAX_EXPTIME = 27487.7906944;  // in seconds (0xFFFFFFFFFF * 25nsec)
     static constexpr double EAGLE_CAMERA_MAX_EXPTIME = 2.5E-8 * 0xFFFFFFFFFF;  // in seconds (0xFFFFFFFFFF * 25nsec)
@@ -147,15 +150,24 @@ private:
         std::chrono::utc_clock::time_point startTime;
         std::chrono::utc_clock::time_point abortTime;
         bool saveInAbort;
+
         double expTime;  // in seconds
+
         uint16_t roiStartX;
         uint16_t roiStartY;
         uint16_t roiWidth;
         uint16_t roiHeight;
         uint8_t binX;
         uint8_t binY;
+
         std::string_view readRate;
         std::string_view readMode;
+
+        double ccdTemp;
+        double tecSetPoint;
+        bool tecState;
+        double pcbTemp;
+
         std::string filename;
         std::string templateFilename;
         std::vector<std::string> permanentKeywords;
@@ -195,7 +207,7 @@ private:
 
     uint16_t _dimCCD[2] = {2048, 2048};  // init to E2V 4240 CCD dimension
 
-    // CCD temperature and TEC set point calibration data
+    // CCD temperature and TEC set point calibration relation coefficients
     double _adcCCDTempCalibCoeffs[2] = {0, 0};  // [k, b], Temp(degs C) = k*ADC + b
 
     // [k, b, k_rev, b_rev]
@@ -216,6 +228,9 @@ private:
     std::vector<std::string> _currentFitsKeywords;    // current acquisition FITS keywords
     std::vector<std::string> _permanentFitsKeywords;  // permanent user FITS keywords
 
+    // std::list<std::unique_ptr<ushort>> _acqRingBuffer;
+    std::list<std::pair<std::unique_ptr<ushort>, size_t>> _acqRingBuffer;
+
 
     // hardware version info
     byte_seq_t _microVersion;  // microcontroller version: _microVersion[0] - major, _microVersion[1] - minor
@@ -304,10 +319,12 @@ private:
     void xclibApiCall(int err, const adc::traits::adc_input_char_range auto& func_name)
     {
         if (err < 0) {
+            auto s_err = pxd_mesgErrorCode(err);
+
             if (std::ranges::size(func_name)) {
-                logError("XCLIB API call ('{}') returns: {} ({})", func_name, err, pxd_mesgErrorCode(err));
+                logError("XCLIB API call ('{}') returns: {} ({})", func_name, err, s_err);
             } else {
-                logError("XCLIB API call returns: {} ({})", err, pxd_mesgErrorCode(err));
+                logError("XCLIB API call returns: {} ({})", err, s_err);
             }
 
             if constexpr (!NOEXCEPT) {