This $249,924 Project Grant from the National Science Foundation's Geosciences program (CFDA 47.050) supports the development of a long-lived, continuously operating seafloor geodesy reference station capable of operating in deep water. The grantee, Princeton University, will investigate using acoustic signals that only need to travel from the sea surface to the seafloor, removing the prior 3,000 meter depth limitation of existing seafloor geodesy techniques. This new approach involves directly positioning a material sensor point on the seafloor using one-way acoustic travel time measurements and leveraging advances in GPS processing for precise positioning of acoustic transducers. Work will include field testing the system in 5,225 meters of water and developing corrections for sound velocity bias as part of the inversion strategy. The award also supports workforce development through interaction of a graduate student with engineering partners to develop expertise in this frontier area of geophysics measuring subsurface position and displacement with implications for understanding earthquake processes.
Mod # | Description | Reason For Modification | Federal Obligation (Click to sort descending) | Date (Click to sort ascending) |
|---|---|---|---|---|
| Not listed | $125.0k | 6/14/22 |