Before revision: The Global Drifter Program (GDP) (formerly known as the Surface Velocity Program (SVP)) collects measurements of surface ocean currents using drifters.
After revision: The Global Drifter Program (GDP) (formerly known as the Surface Velocity Program (SVP)) , was conceived by Prof. Peter Niiler, with the objective of collecting, sea surface temperature and sea-level atmospheric pressure measurements of surface ocean currents using drifters.