# Green

> A 6 kHz single-hydrophone channel from a Norwegian fjord (Norway'24), providing time-diversity data from repeated transmissions over a 270 m range.

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LLMS index: [llms.txt](/llms.txt)

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* Experiment:
  * Location: 60N, 5.3E
  * Date recorded: November 2024
  * Center frequency: f<sub>c</sub> = 6 kHz
  * Bandwidth: B = 4.5 kHz
  * Symbol rate: R = 4.5 ksym/s
  * Distance: d = 270 m
  * Tx/Rx/water depth: d<sub>T</sub>/d<sub>R</sub>/d<sub>w</sub> = 20 m/43 m/60 m
  * Mobility: moored
  * Receiving array: none (single hydrophone)
  * Time diversity: M = 64 channels formed from transmissions repeated every 10 minutes
* Parameters:
  * Sampling rate in delay: f<sub>s</sub> = 2R
  * Total delay coverage: up to 400 ms
  * Sampling rate in time: R/1000 for the channel response, 2R for the phase/delay
  * Total time coverage: approximately 55 seconds

> [!PRIMARY] Acknowledgement
>
> The Underwater Acoustic Channels Group gratefully acknowledges the contribution of the Green dataset from SFI Smart Ocean. For more information, please visit the [IEEE Dataport link](https://ieee-dataport.org/open-access/sfi-smart-ocean-dataset-underwater-acoustic-communications).