diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..0433a4f7287f938695a2c0a6912b1270ff8929e9
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "deps/RTKLIB"]
+	path = deps/RTKLIB
+	url = https://github.com/tomojitakasu/RTKLIB.git
diff --git a/deps/RTKLIB b/deps/RTKLIB
new file mode 160000
index 0000000000000000000000000000000000000000..71db0ffa0d9735697c6adfd06fdf766d0e5ce807
--- /dev/null
+++ b/deps/RTKLIB
@@ -0,0 +1 @@
+Subproject commit 71db0ffa0d9735697c6adfd06fdf766d0e5ce807