Xarray occasionally forces data variables to all zeros

[s-kganz]

First observed on CTD instrument RS01SBPS-SF01A-2A-CTDPFA102 for November 2016. Calling open_mfdataset or open_dataset to open data at an OpenDAP URL will sometimes result in the obs and/or time variables being set to all zeros.

[s-kganz]

Issue also occurs for some data variables, but more rarely. For ex, requesting CTD in June 2016 results in seawater_pressure getting zero'd.

jun.search(region="cabled",instrument="ctd,nitrate",node="SF01A")

[s-kganz]

Issue can occur for only part of the dataset. Below, the plot color codes with pressure. One streak is colored, the other is all zeros.

[s-kganz]

Continually redoing the to_xarray() call will sometimes fix the problem. In 40 trials checking 3 different variables, all three arrived 19 times.