diff --git a/sw/ground_segment/tmtc/aircraft.ml b/sw/ground_segment/tmtc/aircraft.ml
index b1526b6963..eb7c3614b2 100644
--- a/sw/ground_segment/tmtc/aircraft.ml
+++ b/sw/ground_segment/tmtc/aircraft.ml
@@ -77,6 +77,7 @@ type aircraft = {
     name : string;
     flight_plan : Xml.xml;
     mutable pos : Latlong.utm;
+    mutable unix_time : float;
     mutable roll    : float;
     mutable pitch   : float;
     mutable nav_ref    : Latlong.utm option;
@@ -137,6 +138,7 @@ let new_aircraft = fun id name fp ->
     desired_altitude = 0.;
     desired_climb = 0.;
     pos = { Latlong.utm_x = 0.; utm_y = 0.; utm_zone = 0 };
+    unix_time = 0.;
     nav_ref = None;
     cam = { phi = 0.; theta = 0. ; target=(0.,0.)};
     inflight_calib = { if_mode = 1 ; if_val1 = 0.; if_val2 = 0.};
diff --git a/sw/ground_segment/tmtc/aircraft.mli b/sw/ground_segment/tmtc/aircraft.mli
index 6bdbe3e89b..b9d2ac6b1c 100644
--- a/sw/ground_segment/tmtc/aircraft.mli
+++ b/sw/ground_segment/tmtc/aircraft.mli
@@ -63,6 +63,7 @@ type aircraft = {
     name : string;
     flight_plan : Xml.xml;
     mutable pos : Latlong.utm;
+    mutable unix_time : float;
     mutable roll : float;
     mutable pitch : float;
     mutable nav_ref : Latlong.utm option;
diff --git a/sw/ground_segment/tmtc/server.ml b/sw/ground_segment/tmtc/server.ml
index 8c990f2fdc..77e460260e 100644
--- a/sw/ground_segment/tmtc/server.ml
+++ b/sw/ground_segment/tmtc/server.ml
@@ -243,6 +243,7 @@ let log_and_parse = fun logging ac_name (a:Aircraft.aircraft) msg values ->
       a.pos <- { utm_x = fvalue "utm_east" /. 100.;
 		 utm_y = fvalue "utm_north" /. 100.;
 		 utm_zone = ivalue "utm_zone" };
+      a.unix_time <- Latlong.unix_time_of_tow (truncate (fvalue "itow" /. 1000.));
       a.gspeed  <- fvalue "speed" /. 100.;
       a.course  <- norm_course ((Deg>>Rad)(fvalue "course" /. 10.));
 
@@ -551,6 +552,7 @@ let send_aircraft_msg = fun ac ->
 		  "pitch", f (Geometry_2d.rad2deg a.pitch);
 		  "lat", f ((Rad>>Deg)wgs84.posn_lat);
 		  "long", f ((Rad>>Deg) wgs84.posn_long);
+		  "unix_time", f a.unix_time;
 		  "speed", f a.gspeed;
 		  "course", f (Geometry_2d.rad2deg a.course);
 		  "alt", f a.alt;