diff --git a/testinput_tier_1/obs/amsua_n19_obs_2020121500_l.nc4 b/testinput_tier_1/obs/amsua_n19_obs_2020121500_l.nc4
new file mode 100644
index 0000000..b9274b7
--- /dev/null
+++ b/testinput_tier_1/obs/amsua_n19_obs_2020121500_l.nc4
@@ -0,0 +1,3 @@
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