PR-48 INDOPACO, 2024 (Wind Farm + Dot Changing Apparent Direction)

[john.phil]

So if it was 2024 then it's down to within 3 days?

And now we know the location we can get the wind direction..

It looks like the repair vessel was there continuously from 9 Dec '23 until at least 3 Jan '24, and we don't see it in the video. So looks like the video was taken before it arrived.

It's possible the vessel did not complete the repairs before leaving. Instead, it might have been involved in the initial inspection and removal of debris before the blades could be replaced at a later date.

 

[ThomasH]

Something is wrong in my simulation, the drone has to travel at 690 km/t - 192 m/s
I just don't get it how I can match the video as well as this, if the distance is half or less?

Source: https://youtu.be/B3zhsLNAZkg
(only made the first 21 seconds)

I will try to see if I can match match the start and end point at closer range.

 

[Mick West]

Something is wrong in my simulation, the drone has to travel at 690 km/t - 192 m/s
I just don't get it how I can match the video as well as this, if the distance is half or less?

Half or less of what?

 

[ThomasH]

Half or less of what?

The distance.
I matched the perspective pretty well at that FOV, if I move to half the distance, I can't match all the turbines...
I will try to get it working.

 

[ThomasH]

Half or less of what?

When I move the camera much closer, I start losing the perspective.

 

[john.phil]

Something is wrong in my simulation, the drone has to travel at 690 km/t - 192 m/s

If the platform was an MQ-9A Reaper, cruising speed is 313kph, max is 482kph. For the MQ-9B, cruising speed is 310kph, maximum speed is 390kph.

source: https://en.wikipedia.org/wiki/General_Atomics_MQ-9_Reaper

 

[Giddierone]

It's possible the vessel did not complete the repairs before leaving. Instead, it might have been involved in the initial inspection and removal of debris before the blades could be replaced at a later date.

Looks like it was the Zhongtian 8 Heavy Maintenance and Construction platform that was there for more than a fortnight. Edit: so the video must be from before 9 Dec '23

https://globalfishingwatch.org/map/index?longitude=121.17000630387673&latitude=36.49581137058942&zoom=11.232244339586527&dvIn[0][id]=sentinel2&dvIn[0][cfg][vis]=true&dvIn[1][id]=sar&dvIn[1][cfg][vis]=true&dvIn[2][id]=presence&dvIn[2][cfg][vis]=true&dvIn[3][id]=basemap&dvIn[3][cfg][basemap]=satellite&dvIn[4][id]=vessel-a26f4fed1-1e27-8fa5-ed11-4b2289f715e6:v4.0&dvIn[4][dvId]=fishing-map-vessel-track-v-4&dvIn[4][cfg][clr]=#F95E5E&dvIn[4][cfg][info]=public-global-vessel-identity:v4.0&dvIn[4][cfg][track]=~2&dvIn[4][cfg][events][0]=~3&dvIn[4][cfg][events][1]=~4&dvIn[4][cfg][events][2]=~5&dvIn[4][cfg][events][3]=~6&dvIn[4][cfg][events][4]=~7&dvIn[4][dT]=false&dvIn[4][injected]=true&dvIn[5][id]=vessel-e29173bb8-829e-4973-d37f-980e919b28d5:v4.0&dvIn[5][dvId]=fishing-map-vessel-track-v-4&dvIn[5][cfg][clr]=#33B679&dvIn[5][cfg][info]=public-global-vessel-identity:v4.0&dvIn[5][cfg][track]=~2&dvIn[5][cfg][events][0]=~3&dvIn[5][cfg][events][1]=~4&dvIn[5][cfg][events][2]=~5&dvIn[5][cfg][events][3]=~6&dvIn[5][cfg][events][4]=~7&dvIn[5][dT]=false&dvIn[5][injected]=true&start=2023-12-09T00:00:00.000Z&end=2024-01-06T00:00:00.000Z&bDV&vDi=public-global-vessel-identity:v4.0&vIs=selfReportedInfo&vSRi=e29173bb8-829e-4973-d37f-980e919b28d5&vE[0]=loitering&vE[1]=encounter&vE[2]=port_visit&vE[3]=gaps&lTD=&fTD=&trackCorrectionId=&tk[0]=fishing-map-vessel-track-v-4&tk[1]=public-global-vessel-identity:v4.0&tk[2]=public-global-all-tracks:v4.0&tk[3]=public-global-fishing-events:v4.0&tk[4]=public-global-port-visits-events:v4.0&tk[5]=public-global-encounters-events:v4.0&tk[6]=public-global-loitering-events:v4.0&tk[7]=public-global-gaps-events:v4.0

https://www.tgs4c.com/vessels/vessel-zhongtian-8-vid3631.html

 

[jarlrmai]

Could it be further away and using an possibly limited undocumented narrower FOV, we ran in to this with the ATFLIR having listed optical FOVs and then also digital crop modes that presented smaller FOVs

 

[ThomasH]

Could it be further away and using an possibly limited undocumented narrower FOV, we ran in to this with the ATFLIR having listed optical FOVs and then also digital crop modes that presented smaller FOVs

If it's further away it have to go even faster to rotate the perspective right.

 

[ThomasH]

If it's further away it have to go even faster to rotate the perspective right.

Source: https://youtu.be/mXeOu7f6sYg


First clip is the right focal length, the next is more wide so you can see the rotation better, then the distance of the drone, 4080 meters in 21,2 seconds.
If it's moved much closer, then the perspective between the turbines is twisted too much when rotating.
I can maybe move it a bit, but I can never come down to 2-300 km/h

Could it be anything other than a drone ?

Damn I hate all these unknowns, imagine how easy it could have been if they didn't redact everything

 

[RobertBillyBob]

Source: https://youtu.be/mXeOu7f6sYg


First clip is the right focal length, the next is more wide so you can see the rotation better, then the distance of the drone, 4080 meters in 21,2 seconds.
If it's moved much closer, then the perspective between the turbines is twisted too much when rotating.
I can maybe move it a bit, but I can never come down to 2-300 km/h

Could it be anything other than a drone ?

Damn I hate all these unknowns, imagine how easy it could have been if they didn't redact everything

Can you upload your blend file somewhere? I can check if I find anything wrong in your settings.

 

[jarlrmai]

Wait a sec, the camera is rotating as the platform moves forward, are you accounting for that?

 

[ThomasH]

Wait a sec, the camera is rotating as the platform moves forward, are you accounting for that?

That's the whole point
The drone/camera is moving south away from the turbines, in what I guess is a pretty straight line, but it's climbing up.
The camera then rotates to follow the thing.

 

[ThomasH]

Can you upload your blend file somewhere? I can check if I find anything wrong in your settings.

I will try some more before I give up

 

[ThomasH]

Is the zoom fixed in those ranges or can they in and out smooth ?

 

[jarlrmai]

Most /all military EO/IR systems we've seen change lenses and crop in to change FOV in distinct steps.

 

[ThomasH]

Most /all military EO/IR systems we've seen change lenses and crop in to change FOV in distinct steps.

Yeah I thought so. I started over aligning and sometimes I have to move the drone/camera quite a bit back in a very short time, it looks more like the camera zooms a bit.

 

[Mick West]

Yeah I thought so. I started over aligning and sometimes I have to move the drone/camera quite a bit back in a very short time, it looks more like the camera zooms a bit.

I don't think there's any change in zoom. What FOV are you using?

 

[ThomasH]

0.63 HFOV
I think Lehto are right about the race track in the end!
I have eat now, it's 18:22 here, I will finish it later

 

[Mick West]

0.63 HFOV
I think Lehto are right about the race track in the end!
I have eat now, it's 18:22 here, I will finish it later

I think it's essentially doing an S-turn. This is what I had a couple of days ago with a dummy layout.
https://www.metabunk.org/sitrec/?custom=1/PR48 With Banking Extracted/20260511_110030.js

I need to redo it for the actual layout, but I was doing some work on extracting and back-propagating (triangulating) the N-Angle from the ground track. Might take a while...