Lagrangian Frame

The Lagrangian perspective... 

GPS drifters

Lagrangian observations are recorded using BigEye beacons that transmit GPS position over a VHF radio link.  In addition, the drifters each contained a handheld Garmin GPS 72 unit that internally recorded position every 3 minutes.  For each deployment 11 or 12 drifters were drogued using a 5 m long holey sock centred at a depth of either 5 or 15 m.  The experiments lasted between 5 to 18 hours.  The measured GPS resolution was approximately 8 m.  .

Chiswell SM  Stevens, CL  2010. Lagrangian and Eulerian estimates of circulation in the lee of Kapiti Island, New Zealand, Continental Shelf Research.  30, 515-532.

Stevens, C. 2010. Short‑term Dispersion and Turbulence in a Complex‑shaped Estuarine Embayment, Cont. Shelf Res.  30 (2010) 393–402,