Pink

A 6 kHz, 14 km channel recorded off Kochi Prefecture, Japan in 2022, covering flat, up-slope, and down-slope bathymetry with a 24-element vertical array.

Experiment:
- Location: Off the coast of Kochi Prefecture
- Date recorded: July 2022
- Center frequency: f_c = 6 kHz
- Bandwidth: B = 4 kHz
- Symbol rate: R = 4 ksym/s
- Distance: d = 14 km
- Tx/Rx depth: d_T/d_R = 176 m/146 m
- Water depth d_w: varying; the data cover down-slope, up-slope, and flat bathymetry, with a water depth of 200 m in the flat case
- Mobility: moored
- Receiving array: vertical, M = 24 elements at most, in six hydrophone groups. Within each group, the inter-element spacing is ℓ = 0.9 m; the distance between groups is 1.8 m.
Parameters:
- Sampling rate in delay: f_s = 2R
- Total delay coverage: up to 210 ms
- Sampling rate in time: R/100 for the channel response, 2R for the phase/delay
- Total time coverage: 55 seconds

Acknowledgement

The Underwater Acoustic Channels Group gratefully acknowledges the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) for their efforts in providing the data.