Surface Velocity Program Salinity (SVP-S) Drifter

SVPS Drifter Schematic
Surface Velocity Program Salinity Drifter

Technical Description

  • 35cm sphere surface float
  • GPS based tracking
  • Iridium Short Burst Data (SBD) telemetry
  • Sea Surface Temperature (±0.05K accuracy)
  • Sea Surface Salinity
  • Holey Sock Drogue centered at 15m depth
  • Variable sampling rate down to 5 minutes
  • 1 year lifespan

Sea Surface Salinity Sensor

The SVP Salinity (SVPS) drifter (Centurioni et al. 2015; Hormann et al. 2014a) stems from the SVP Drifter design and can also be configured with a barometer. It carries a Sea Bird Electronics SBE37 sensor.

The salinity sensor is located at a depth of 0.5 m and a slightly bigger drogue is used to compensate for the larger drag area of the surface buoy and the salinity sensor mount combined, as needed to keep the drag-area ratio larger than 40.

The lifespan of the SVPS drifter is shorter than for the SVP and SVPB drifters due to the SBE37, and is about one year.