diff --git a/SDC/astron-lofar-structure.graffle b/SDC/astron-lofar-structure.graffle
new file mode 100644
index 0000000000000000000000000000000000000000..b9121bbdb890ae1872d8b9d2720dd19938796ced
--- /dev/null
+++ b/SDC/astron-lofar-structure.graffle
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:705ff9a4ab24fb68bcd821f3bf188a4b5669224173208a2aaed226cc53dd766b
+size 360432
diff --git a/SDC/astron-lofar-structure.pdf b/SDC/astron-lofar-structure.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..9231b2c197b0f09d4b865784a64646b3db17946c
--- /dev/null
+++ b/SDC/astron-lofar-structure.pdf
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:15d0c9f9db87133de7b15bf71e6a7fe66b0b558bb970afea233e76098d6a8aeb
+size 25034