diff --git a/conf/gnss-sdr_GPS_L1_LimeSDR.conf b/conf/gnss-sdr_GPS_L1_LimeSDR.conf
index 97bbb4fab..98df86cf8 100644
--- a/conf/gnss-sdr_GPS_L1_LimeSDR.conf
+++ b/conf/gnss-sdr_GPS_L1_LimeSDR.conf
@@ -1,9 +1,7 @@
 ; This is a GNSS-SDR configuration file
 ; The configuration API is described at https://gnss-sdr.org/docs/sp-blocks/
-
-; You can define your own receiver and invoke it by doing
-; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
-;
+; SPDX-License-Identifier: GPL-3.0-or-later
+; SPDX-FileCopyrightText: (C) 2010-2021  (see AUTHORS file for a list of contributors)
 
 [GNSS-SDR]
 
diff --git a/conf/gnss-sdr_labsat_kf_vtl.conf b/conf/gnss-sdr_labsat_kf_vtl.conf
index 8580be177..b5f8ce879 100644
--- a/conf/gnss-sdr_labsat_kf_vtl.conf
+++ b/conf/gnss-sdr_labsat_kf_vtl.conf
@@ -1,9 +1,7 @@
 ; This is a GNSS-SDR configuration file
 ; The configuration API is described at https://gnss-sdr.org/docs/sp-blocks/
-
-; You can define your own receiver and invoke it by doing
-; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
-;
+; SPDX-License-Identifier: GPL-3.0-or-later
+; SPDX-FileCopyrightText: (C) 2010-2021  (see AUTHORS file for a list of contributors)
 
 [GNSS-SDR]
 
diff --git a/src/algorithms/libs/trackingcmd.cc b/src/algorithms/libs/trackingcmd.cc
index 9fcaea8ce..d41d155cf 100644
--- a/src/algorithms/libs/trackingcmd.cc
+++ b/src/algorithms/libs/trackingcmd.cc
@@ -1,8 +1,18 @@
-/*
- * trackingcmd.cc
+/*!
+ * \file trackingcmd.cc
+ * \brief Class that stores information to update the GNSS signal tracking estimations
+ * \author Javier Arribas, 2021. jarribas(at)cttc.es
  *
- *  Created on: 20 ago. 2020
- *      Author: javier
+ *
+ * -----------------------------------------------------------------------------
+ *
+ * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
+ * This file is part of GNSS-SDR.
+ *
+ * Copyright (C) 2010-2020  (see AUTHORS file for a list of contributors)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * -----------------------------------------------------------------------------
  */
 
 #include "trackingcmd.h"
diff --git a/src/algorithms/libs/trackingcmd.h b/src/algorithms/libs/trackingcmd.h
index 58b6e71a9..ce6a44f6c 100644
--- a/src/algorithms/libs/trackingcmd.h
+++ b/src/algorithms/libs/trackingcmd.h
@@ -1,8 +1,18 @@
-/*
- * trackingcmd.h
+/*!
+ * \file trackingcmd.h
+ * \brief Class that stores information to update the GNSS signal tracking estimations
+ * \author Javier Arribas, 2021. jarribas(at)cttc.es
  *
- *  Created on: 20 ago. 2020
- *      Author: javier
+ *
+ * -----------------------------------------------------------------------------
+ *
+ * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
+ * This file is part of GNSS-SDR.
+ *
+ * Copyright (C) 2010-2020  (see AUTHORS file for a list of contributors)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * -----------------------------------------------------------------------------
  */
 
 #ifndef SRC_ALGORITHMS_LIBS_TRACKINGCMD_H_