Answers.Body: <p>Malinka et al (2020) published a relevant paper describing a synchonization cable to clock-sync seven ST300's on a vertical string, so it's certainly possible, though custom firmware (support from OINZ) would also be required. Their guide to construction is in the supplemental material and seems very complete and clear. Code for synchronisation is also available at github <a href="https://github.com/cemalinka/SoundTrapArray" rel="nofollow noreferrer">https://github.com/cemalinka/SoundTrapArray</a></p>
  <p>However, I don't recall there being any underwater connector on the ST600, so newer models might no longer have such capabilities.</p>
  <p>Malinka, C. E., Atkins, J., Johnson, M. P., Tønnesen, P., Dunn, C. A., Claridge, D. E., et al. (2020). An autonomous hydrophone array to study the acoustic ecology of deep-water toothed whales. Deep Sea Research Part I: Oceanographic Research Papers 158, 103233. doi: <a href="https://dx.doi.org/10.1016/j.dsr.2020.103233" rel="nofollow noreferrer">10.1016/j.dsr.2020.103233</a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-01T07:45:52.470Z
Answers.Text: Yes, an external connector is requirement for sync, which I could not see or being mentioned in newer ST models (newer means with SDcards and not Flash chips). That's why I asked for ST model.
Answers.UserDisplayName: WMXZ
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-04T15:57:43.253Z
Answers.Text: Thank you Brian, the code you shared seems helpful, I will try it. Otherwise I also managed to do this in avisoft.
Answers.UserDisplayName: Rut
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-04T15:59:05.673Z
Answers.Text: And the soundtraps that I will be using are ST300 HF.
Answers.UserDisplayName: Rut
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-01T06:18:51.687Z
Answers.LastActivityDate: 2024-02-01T06:18:51.687Z
Answers.UserDisplayName: Brian Miller
Body: <p>I am going to carry out a series of surveys in Peru for which I plan to tow two soundtraps inserted in the same towfish. They will be separated by approximately 50 cm so I want to use them to extract bearing parameters and hopefully distance. For this I also plan to use Pamguard.</p>
  <p>However I am not sure how can I synchronize them to work as one. Could this be done in Pamguard or with some other tool?</p>
  <p>Last year I used an array ST4300 so I had different channels in the same recording, but this year I couldn't take this array so I am using two independent soundtraps but would like to know if I can combine the recordings of the two soundtraps in one.</p>
  <p>Also, I would like to know if the distance to the animal can be estimated in Pamguard from the bearing and change in location and how to do this.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2024-01-31T17:09:10.847Z
Comments.Text: While I'm sceptical that it can be done, It would be important to know, which soundtraps you have available. Maybe there is an solution.
Comments.UserDisplayName: WMXZ
Tags: <pamguard><soundtrap><array><bearing>
Title: How to synchronize two independent soundtraps working as part of the same hydrophone array?
ThreadText: # How to synchronize two independent soundtraps working as part of the same hydrophone array?
  
  (Asked by: username_0 on 2024-01-31)
  
  I am going to carry out a series of surveys in Peru for which I plan to tow two soundtraps inserted in the same towfish. They will be separated by approximately 50 cm so I want to use them to extract bearing parameters and hopefully distance. For this I also plan to use Pamguard.
  
  However I am not sure how can I synchronize them to work as one. Could this be done in Pamguard or with some other tool?
  
  Last year I used an array ST4300 so I had different channels in the same recording, but this year I couldn't take this array so I am using two independent soundtraps but would like to know if I can combine the recordings of the two soundtraps in one.
  
  Also, I would like to know if the distance to the animal can be estimated in Pamguard from the bearing and change in location and how to do this.
  
  **Tags:** pamguard, soundtrap, array, bearing
  
  > **Comments:**
  > **username_1**: While I'm sceptical that it can be done, It would be important to know, which soundtraps you have available. Maybe there is an solution.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2024-02-01. Score: 2
  
  Malinka et al (2020) published a relevant paper describing a synchonization cable to clock-sync seven ST300's on a vertical string, so it's certainly possible, though custom firmware (support from OINZ) would also be required. Their guide to construction is in the supplemental material and seems very complete and clear. Code for synchronisation is also available at github <https://github.com/cemalinka/SoundTrapArray>
  
  However, I don't recall there being any underwater connector on the ST600, so newer models might no longer have such capabilities.
  
  Malinka, C. E., Atkins, J., Johnson, M. P., Tønnesen, P., Dunn, C. A., Claridge, D. E., et al. (2020). An autonomous hydrophone array to study the acoustic ecology of deep-water toothed whales. Deep Sea Research Part I: Oceanographic Research Papers 158, 103233. doi: [10.1016/j.dsr.2020.103233](https://dx.doi.org/10.1016/j.dsr.2020.103233)
  
  > **Comments:**
  > **username_1**: Yes, an external connector is requirement for sync, which I could not see or being mentioned in newer ST models (newer means with SDcards and not Flash chips). That's why I asked for ST model.  
  > **username_0**: Thank you Brian, the code you shared seems helpful, I will try it. Otherwise I also managed to do this in avisoft.  
  > **username_0**: And the soundtraps that I will be using are ST300 HF.  
  
  ---
  
  