SWIFT-A: Shallow Water Ice Fracturing Tracking and Acoustics

Project: Shallow Water Ice Fracture Tracking and Acoustics - Two acoustic datasets collected on a frozen shallow freshwater lake during March of 2023 are included. This collection took place over one full week on Portage Lake in the Upper Peninsula of Michigan, USA. The first dataset consists of ambient ice and environmental noises collected by an array of hydrophones, microphones and geophones placed below, above and on the ice respectively. The second dataset consists of instrumented force hammer impacts at a series of locations on the the ice with the corresponding response at each acoustic sensor. Corresponding local weather data is also provided. These two data sets offer a rich look into the physics of ice cover movement, response to weather phenomena, shallow water and ice cover waveguide acoustic propagation and ice sheet response to weather. The datasets consists of raw time series data from all sensors, array dimensions and placement and hardware descriptions.
This project has received funding from PIPELINE (Penn State Intern Pipeline Links to Navy Engineering,https://pipeline.psu.edu/).
Summary: A data set containing passive acoustic data from microphones, geophones and hydrophones placed on a frozen lake for 1 week. The experiment was conducted in February of 2024 on Portage Lake in the Upper Peninsula of Michigan, USA.The primary passive data is structured in 1-minute HDF5 files, each containing 8 or 11 channels of ambient ice fracture time series data recorded at 52100 Hz sample rate. The sensors were placed on/below ice ~254mm thick over water ~600mm deep. The secondary data set contains HDF5 files of in a similar structure to the first data set, but contain active impact responses in an array of locations around each acoustic sensor. Active impacts were created with a force hammer at a pre-determined set of impact locations around each acoustic array.