diff --git a/.gitmodules b/.gitmodules
index 765d1e2..f3c8fc9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "simulations/airshower_beacon_simulation/earsim"]
 	path = simulations/airshower_beacon_simulation/lib/earsim
 	url = https://gitlab.com/harmscho/earsim.git
+[submodule "simulations/airshower_beacon_simulation/lib/atmocal"]
+	path = simulations/airshower_beacon_simulation/lib/atmocal
+	url = https://gitlab.com/harmscho/AtmosphereCal
diff --git a/simulations/airshower_beacon_simulation/lib/atmocal b/simulations/airshower_beacon_simulation/lib/atmocal
new file mode 160000
index 0000000..cd903a3
--- /dev/null
+++ b/simulations/airshower_beacon_simulation/lib/atmocal
@@ -0,0 +1 @@
+Subproject commit cd903a30f99e7f640ed068c4393cd38c23c316e2