Purple

A 12.5 kHz shallow-water channel from the SPACE'08 experiment off Martha’s Vineyard, with cross and vertical receiving arrays at ranges from 60 m to 1 km.

Experiment:
- Location: 41.2N, 70.3W
- Date recorded: October 2008
- Center frequency: f_c = 12.5 kHz
- Bandwidth: B = 6.6 kHz
- Symbol rate: R = 10⁷/1536 sym/s (approximately 6.5 ksym/s)
- Distance: d = 60 m (array 1), 200 m (array 2), and 1 km (array 3)
- Tx/Rx/water depth: d_T/d_R/d_w = 11 m/10 m/15 m
- Mobility: moored
- Receiving array 1: cross, 16 elements in each leg (M = 32 in total), ℓ = 3.75 cm spacing (numbered top to bottom, then left to right)
- Receiving array 2: vertical, M = 24 elements, ℓ = 5 cm spacing (numbered top to bottom)
- Receiving array 3: vertical, M = 12 elements, ℓ = 12 cm spacing (numbered top to bottom)
Parameters:
- Sampling rate in delay: f_s = 2R
- Total delay coverage: up to 27 ms
- Sampling rate in time: R/100 for the channel response, 2R for the phase/delay
- Total time coverage: 55 seconds