diff --git a/res/ui/ui.glade b/res/ui/ui.glade
index 58b7e40..fe42ef2 100644
--- a/res/ui/ui.glade
+++ b/res/ui/ui.glade
@@ -1574,6 +1574,65 @@
             <property name="position">2</property>
           </packing>
         </child>
+        <child>
+          <object class="GtkBox">
+            <property name="visible">True</property>
+            <property name="can-focus">False</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="can-focus">False</property>
+                <property name="label" translatable="yes">Reference Frame: </property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="can-focus">False</property>
+                <property name="label" translatable="yes">Fixed</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkSwitch" id="reference_frame">
+                <property name="visible">True</property>
+                <property name="can-focus">True</property>
+                <signal name="state-set" handler="on_reference_frame_state_set" swapped="no"/>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">2</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkLabel">
+                <property name="visible">True</property>
+                <property name="can-focus">False</property>
+                <property name="label" translatable="yes">Intertial</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">3</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">3</property>
+          </packing>
+        </child>
         <child>
           <object class="GtkButton" id="fetch_data">
             <property name="label" translatable="yes">Re-fetch Data</property>
@@ -1586,7 +1645,7 @@
           <packing>
             <property name="expand">False</property>
             <property name="fill">True</property>
-            <property name="position">3</property>
+            <property name="position">4</property>
           </packing>
         </child>
         <child>
@@ -1668,7 +1727,7 @@
           <packing>
             <property name="expand">False</property>
             <property name="fill">True</property>
-            <property name="position">4</property>
+            <property name="position">5</property>
           </packing>
         </child>
       </object>
diff --git a/src/phys/phys.c b/src/phys/phys.c
index 75bded4..383ffb2 100644
--- a/src/phys/phys.c
+++ b/src/phys/phys.c
@@ -2,7 +2,9 @@
 
 #include "SGP4.h"
 
+#include "camera.h"
 #include "satellite.h"
+#include "setting.h"
 #include "system.h"
 #include "thread.h"
 #include "timemgr.h"
@@ -75,6 +77,14 @@ void *phys_thrd(void *arguments)
 
 void phys_phys_sync(void)
 {
+	if (gs_reference_frame == REFERENCE_FRAME_INERTIAL) {
+		gint64 diff_ms = phys_ctx_sync.epoch_ms - e_phys.epoch_ms;
+		float dang = (-2.f * (float)G_PI * diff_ms) / MS_IN_DAY;
+		glm_vec2_copy((vec2){ e_camera.pos[0] * cosf(dang) - e_camera.pos[1] * sinf(dang),
+				      e_camera.pos[1] * cosf(dang) + e_camera.pos[0] * sinf(dang) },
+			e_camera.pos);
+		camera_view_update(&e_camera);
+	}
 	e_phys = phys_ctx_sync;
 }
 
diff --git a/src/ui/setting.c b/src/ui/setting.c
index 8059d7e..3702f18 100644
--- a/src/ui/setting.c
+++ b/src/ui/setting.c
@@ -28,6 +28,7 @@ struct Setting settings[3] = {
 gboolean gs_gmt = FALSE;
 gboolean gs_clouds = TRUE;
 gboolean gs_lighting = TRUE;
+enum ReferenceFrame gs_reference_frame = REFERENCE_FRAME_FIXED;
 
 static GtkWindow *window_settings;
 
@@ -35,6 +36,7 @@ static void on_settings_clicked(GtkToolButton *toolbutton, gpointer user_data);
 static gboolean on_window_settings_delete_event(GtkWidget *widget, GdkEvent *event, gpointer user_data);
 static void on_setting_toggled(GtkToggleButton *togglebutton, gpointer user_data);
 static void on_fetch_data_clicked(GtkButton *button, gpointer user_data);
+static gboolean on_reference_frame_state_set(GtkSwitch *widget, gboolean state, gpointer user_data);
 
 void on_settings_clicked(GtkToolButton *toolbutton, gpointer user_data)
 {
@@ -73,6 +75,16 @@ void on_fetch_data_clicked(GtkButton *button, gpointer user_data)
 	}
 }
 
+gboolean on_reference_frame_state_set(GtkSwitch *widget, gboolean state, gpointer user_data)
+{
+	(void)widget;
+	(void)user_data;
+
+	gs_reference_frame = (enum ReferenceFrame)state;
+
+	return FALSE;
+}
+
 void setting_init(GtkBuilder *builder)
 {
 	gtk_builder_add_callback_symbols(builder,
@@ -80,6 +92,7 @@ void setting_init(GtkBuilder *builder)
 		"on_setting_toggled", G_CALLBACK(on_setting_toggled),
 		"on_window_settings_delete_event", G_CALLBACK(on_window_settings_delete_event),
 		"on_fetch_data_clicked", G_CALLBACK(on_fetch_data_clicked),
+		"on_reference_frame_state_set", G_CALLBACK(on_reference_frame_state_set),
 		NULL);
 
 	window_settings = GTK_WINDOW(gtk_builder_get_object(builder, "window_settings"));
diff --git a/src/ui/setting.h b/src/ui/setting.h
index e70c58a..1902b9e 100644
--- a/src/ui/setting.h
+++ b/src/ui/setting.h
@@ -4,9 +4,15 @@
 #include "type.h"
 #include "ui.h"
 
+enum ReferenceFrame {
+	REFERENCE_FRAME_FIXED = 0u,
+	REFERENCE_FRAME_INERTIAL,
+};
+
 extern gboolean gs_gmt;
 extern gboolean gs_clouds;
 extern gboolean gs_lighting;
+extern enum ReferenceFrame gs_reference_frame;
 
 void setting_init(GtkBuilder *builder);