diff --git a/testinput_tier_1/inputs/geos_c12/geos.cf.bkg.20190102_030000z.nc4 b/testinput_tier_1/inputs/geos_c12/geos.cf.bkg.20190102_030000z.nc4
new file mode 100644
index 00000000..04f98e57
--- /dev/null
+++ b/testinput_tier_1/inputs/geos_c12/geos.cf.bkg.20190102_030000z.nc4
@@ -0,0 +1,3 @@
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