Triangulation methods

[Ray Danner]

Dear colleagues,

I'm curious if you can direct me to resources methods for triangulation with Motus. I have searched the literature and this group's discussions, but I can't find much. Any guidance would be appreciated!

Thank you!

Sincerely,

Ray 

[Degroote, Lucas]

Ray,

 

Are you interested in triangulation with receiving stations or on the ground tracking? I haven’t done a recent lit search but the only paper on the former that I’m aware of is Lenske’s. Alternatively, Paxton uses trilateration which could potentially be adapted. Based on Lenske’s paper and my experience, the stations would have to be close to get simultaneous detections.

 

If you’re interested in tandem ground tracking we were able to use a simple linear regression between signal strength and known distance to estimate distance of individuals not sighted. I could send you more information on that if it would be helpful.

 

Sincerely,

 

Luke DeGroote

Avian Conservation Scientist

Powdermill Nature Reserve

Carnegie Museum of Natural History

724-593-5521

 

 

From: motu...@googlegroups.com <motu...@googlegroups.com> On Behalf Of Ray Danner
Sent: Saturday, January 28, 2023 3:15 PM
To: Motus Wildlife Tracking System <motu...@googlegroups.com>
Subject: [motus-wts] Triangulation methods

 

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[Scott MacDougall-Shackleton]

Hi Ray,

The big challenge (as far as I understand it) for triangulation is the highly variable signal strength depending on bird movement.

You may be interested in this PhD that used a local array of sensorgnomes to track flock membership of chickadees:

https://ir.lib.uwo.ca/etd/8310/

Take care, Scott

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<Lenske_et_al-2018-Journal_of_Field_Ornithology.pdf><paxton_et_al_2022_ecolevol.pdf>

[Cornelius, Jamie Margaret]

Hi All,

This group triangulated and provides the package they used in their methods - but it may be that triangulations were calculated from handheld tracking rather than from the Motus network. Maybe worth asking them though.

Best,

Jamie

------------------------------
Jamie M. Cornelius
Assistant Professor
Department of Integrative Biology
3029 Cordley Hall
Oregon State University
Corvallis, OR 97331

corn...@oregonstate.edu
541-737-0931

she/her/hers

On Jan 30, 2023, at 10:59 AM, Scott MacDougall-Shackleton <smac...@uwo.ca> wrote:

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[Yolanda Morbey]

Hi all,

 

The method to calculate “vanishing bearings” may also be of use, depending on your specific application:

 

https://motuswts.github.io/motus/articles/vanishing-bearings.html

 

This can provide a coarse estimate of a migratory (straight line) departure direction from a known stationary location.

 

Best,

Yolanda

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From: motu...@googlegroups.com <motu...@googlegroups.com> on behalf of Cornelius, Jamie Margaret <jamie.c...@oregonstate.edu>
Sent: Monday, January 30, 2023 2:46 PM
To: motu...@googlegroups.com <motu...@googlegroups.com>
Subject: Re: [motus-wts] Triangulation methods

 

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