diff --git a/src/algorithms/PVT/libs/hybrid_ls_pvt.cc b/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
index ede8a9f83..b6b2f93ad 100644
--- a/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
+++ b/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
@@ -339,7 +339,7 @@ bool hybrid_ls_pvt::get_PVT(std::map<int, Gnss_Synchro> gnss_observables_map, do
                         }
 
                     // get time string Gregorian calendar
-                    boost::posix_time::time_duration t = boost::posix_time::seconds(utc);
+                    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>(utc * 1000000));
                     // 22 August 1999 00:00 last Galileo start GST epoch (ICD sec 5.1.2)
                     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
                     this->set_position_UTC_time(p_time);
diff --git a/src/algorithms/PVT/libs/rinex_printer.cc b/src/algorithms/PVT/libs/rinex_printer.cc
index 859239096..61e02cfb6 100644
--- a/src/algorithms/PVT/libs/rinex_printer.cc
+++ b/src/algorithms/PVT/libs/rinex_printer.cc
@@ -8247,7 +8247,7 @@ boost::posix_time::ptime Rinex_Printer::compute_UTC_time(const Gps_Navigation_Me
     // if we are processing a file -> wait to leap second to resolve the ambiguity else take the week from the local system time
     //: idea resolve the ambiguity with the leap second  http://www.colorado.edu/geography/gcraft/notes/gps/gpseow.htm
     const double utc_t = nav_msg.utc_time(nav_msg.d_TOW);
-    boost::posix_time::time_duration t = boost::posix_time::millisec((utc_t + 604800 * static_cast<double>(nav_msg.i_GPS_week)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((utc_t + 604800 * static_cast<double>(nav_msg.i_GPS_week)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -8260,7 +8260,7 @@ boost::posix_time::ptime Rinex_Printer::compute_GPS_time(const Gps_Ephemeris& ep
     // (see Pag. 17 in http://igscb.jpl.nasa.gov/igscb/data/format/rinex300.pdf)
     // --??? No time correction here, since it will be done in the RINEX processor
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -8273,7 +8273,7 @@ boost::posix_time::ptime Rinex_Printer::compute_GPS_time(const Gps_CNAV_Ephemeri
     // (see Pag. 17 in http://igscb.jpl.nasa.gov/igscb/data/format/rinex300.pdf)
     // --??? No time correction here, since it will be done in the RINEX processor
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -8285,7 +8285,7 @@ boost::posix_time::ptime Rinex_Printer::compute_Galileo_time(const Galileo_Ephem
     // (see Pag. 17 in http://igscb.jpl.nasa.gov/igscb/data/format/rinex301.pdf)
     // --??? No time correction here, since it will be done in the RINEX processor
     double galileo_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((galileo_t + 604800 * static_cast<double>(eph.WN_5)) * 1000);  //
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((galileo_t + 604800 * static_cast<double>(eph.WN_5)) * 1000));  //
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
diff --git a/src/core/system_parameters/rtcm.cc b/src/core/system_parameters/rtcm.cc
index b255b5fb9..8f337f802 100644
--- a/src/core/system_parameters/rtcm.cc
+++ b/src/core/system_parameters/rtcm.cc
@@ -3313,7 +3313,7 @@ std::map<std::string, int> Rtcm::galileo_signal_map = [] {
 boost::posix_time::ptime Rtcm::compute_GPS_time(const Gps_Ephemeris& eph, double obs_time) const
 {
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -3322,7 +3322,7 @@ boost::posix_time::ptime Rtcm::compute_GPS_time(const Gps_Ephemeris& eph, double
 boost::posix_time::ptime Rtcm::compute_GPS_time(const Gps_CNAV_Ephemeris& eph, double obs_time) const
 {
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((gps_t + 604800 * static_cast<double>(eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -3331,7 +3331,7 @@ boost::posix_time::ptime Rtcm::compute_GPS_time(const Gps_CNAV_Ephemeris& eph, d
 boost::posix_time::ptime Rtcm::compute_Galileo_time(const Galileo_Ephemeris& eph, double obs_time) const
 {
     double galileo_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((galileo_t + 604800 * static_cast<double>(eph.WN_5)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((galileo_t + 604800 * static_cast<double>(eph.WN_5)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     return p_time;
 }
@@ -4058,7 +4058,7 @@ int Rtcm::set_DF050(const Gnss_Synchro& gnss_synchro)
 int Rtcm::set_DF051(const Gps_Ephemeris& gps_eph, double obs_time)
 {
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(gps_eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((gps_t + 604800 * static_cast<double>(gps_eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     std::string now_ptime = to_iso_string(p_time);
     std::string today_ptime = now_ptime.substr(0, 8);
@@ -4072,7 +4072,7 @@ int Rtcm::set_DF051(const Gps_Ephemeris& gps_eph, double obs_time)
 int Rtcm::set_DF052(const Gps_Ephemeris& gps_eph, double obs_time)
 {
     const double gps_t = obs_time;
-    boost::posix_time::time_duration t = boost::posix_time::millisec((gps_t + 604800 * static_cast<double>(gps_eph.i_GPS_week % 1024)) * 1000);
+    boost::posix_time::time_duration t = boost::posix_time::milliseconds(static_cast<long>((gps_t + 604800 * static_cast<double>(gps_eph.i_GPS_week % 1024)) * 1000));
     boost::posix_time::ptime p_time(boost::gregorian::date(1999, 8, 22), t);
     std::string now_ptime = to_iso_string(p_time);
     std::string hours = now_ptime.substr(9, 2);