This Product User Manual describes the INSITU_GLO_PHY_UV_DISCRETE_MY_013_044 product distributed by the Copernicus Marine Service In Situ Thematic Assembly Centre (In Situ TAC). This manual describes how it is built, what is the content, what data services are available to access them, and how to use the files.

The In Situ Global ocean delayed mode product designed for reanalysis purposes integrates the best available version of in situ data for ocean surface currents and current vertical profiles.

This product concerns five delayed time datasets dedicated to near-surface currents measurements coming from two platforms (Lagrangian surface drifters and High Frequency radars), velocity profiles within the water column coming from the Acoustic Doppler Current Profiler (ADCP) platform and velocity at surface and around 1000m (parking depth) coming from Argo floats trajectories:

● cmems_obs-ins_glo_phy-cur_my_drifter_PT6H, named drifter in the rest of the document: delayed time zonal and meridional raw velocities measured by drifting buoys, sea surface temperature, quality flags and metadada. These surface observations are part of the DBCP’s Global Drifter Program (GDP - http://www.aoml.noaa.gov/phod/dac/dacdata.php). In addition, a wind slippage correction, from 1993 until the end of the time series, is provided by the In Situ TAC (CLS)

● cmems_obs-ins_glo_phy-cur_my_radar-radial_irr, named radar_radial in the rest of the document: near-surface radial velocities of High Frequency Radars (HFR), quality flags and metadata. These surface observations are part of the European HF radar Network (see Mader et al, 2017 and Corgnati et al., 2018).

● cmems_obs-ins_glo_phy-cur_my_radar-total_irr, named radar_total in the rest of the document: near-surface zonal and meridional components of High Frequency Radars (HFR) derived total velocities, quality flags and metadata. These surface observations are part of the European HF radar Network (see Mader et al, 2017 and Corgnati et al., 2018) and the HFR US networks.

● cmems_obs-ins_glo_phy-cur_my_adcp_irr, named adcp in the rest of the document: three-dimensional water current velocities over a depth range along a vessel underway trajectory or mooring.

● cmems_obs-ins_glo_phy-cur_my_argo_irr, named argo in the rest of the document: ocean currents derived from the Andro delayed mode Argo floats trajectories (Ollitraut et al., 2022). Deep current is calculated from floats drift at parking depth, surface current is calculated from float surface drift.

This product is designed to be assimilated into or for validation purposes of operational models operated by ocean forecasting centers, for reanalysis purposes or for research community. These users need data aggregated and quality controlled in a reliable and documented manner.

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