Depth (spatial coordinate) of sampling event start relative to water surface in the water body by profiling pressure sensor and conversion to depth using unspecified algorithm Start_depth Measurement determined from an in-situ pressure sensor at the beginning of a sampling event 2018-09-27 13:49:56.0 SDN:P01::DEPHPRST SDN:P01::DEPHPRST SDN:P01::DEPHPRST 2 2 2018-09-27 13:49:56.0 accepted false