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1996-2018 Observation Counts

Total counts of raw physical and biogeochemical observations from 1996 through 2018 from fixed stations. The sums are over all sensors so observations from instruments with multiple sensors are counted per sensor rather than per instrument. These counts do not include data from gliders, drifters, AUVs, RiverRad, and observations gathered during cruises from ship based instrumentation. The dramatic decrease in 2018 primarily documents a shift from retaining 1 second data at multiple stations to retaining averages of 30 second sampling pulses.