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https://github.com/pydata/xarray/issues/1301#issuecomment-286220317 https://api.github.com/repos/pydata/xarray/issues/1301 286220317 MDEyOklzc3VlQ29tbWVudDI4NjIyMDMxNw== 1197350 2017-03-13T19:40:50Z 2017-03-13T19:40:50Z MEMBER

And the length of obs is different in each dataset. ```python

for myds in dsets: print(myds.dims) Frozen(SortedKeysDict({u'obs': 7537613})) Frozen(SortedKeysDict({u'obs': 7247697})) Frozen(SortedKeysDict({u'obs': 7497680})) Frozen(SortedKeysDict({u'obs': 7661468})) Frozen(SortedKeysDict({u'obs': 5750197})) ```

 
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