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Sagittarius A*

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dietert1:
Your complaints may just reflect the complexity of the project and you may need to study one of the more technical papers cited in the publication that describe how the interferometry gets done. In youtube videos they show those disk packs and talk about jumbo jets full of them, but that won't answer your questions. Since i don't know a way to digitize a 220 GHz signal, i'd guess they use the hydrogen masers to mix the radio signls down into a 40 GHz or so bandwidth for which continuous digitization and recording exists. Then they probably use some pattern matching to recover phase relation between recordings at different telescopes.
I liked this video:

Obviously there will be a quest to improve the current measurement.

Regards, Dieter

aetherist:

--- Quote from: dunkemhigh on May 15, 2022, 03:20:14 pm ---One only needs to calibrate for things that exist.
--- End quote ---
In many ways changes in the km/s of the aetherwind cancels itself out of measurements of length contraction & ticking dilation & can be ignored. 
Also, the aetherwind effect on the ticking of atomic clocks at an array in one location could be kept under control by ensuring that clocks were identical & orientated in the same direction & at the same level.
And dishes at an array are we know automatically kept in parallel alignments, nearnuff.

I mentioned that the speed of electricity will be faster if a tailwind along the wire. If the aetherwind increases in km/s then the speed of electricity increases by the same proportion. And, the true length of the wire contracts, possibly in accord with the standard equation for gamma (but i don’t think that that equation is good). Anyhow, these 2 effects would tend to negate at any one dish. Anyhow, these effects would tend to be identical at all dishes at that location, & hence would tend to negate overall.

But the aetherwind will hurt them every day, & every year, especially if they don’t minimize the hurt, or make allowances for the hurt.

aetherist:

--- Quote from: dietert1 on May 15, 2022, 03:27:02 pm ---Your complaints may just reflect the complexity of the project and you may need to study one of the more technical papers cited in the publication that describe how the interferometry gets done. In youtube videos they show those disk packs and talk about jumbo jets full of them, but that won't answer your questions. Since i don't know a way to digitize a 220 GHz signal, i'd guess they use the hydrogen masers to mix the radio signls down into a 40 GHz or so bandwidth for which continuous digitization and recording exists. Then they probably use some pattern matching to recover phase relation between recordings at different telescopes.
I liked this video:
Obviously there will be a quest to improve the current measurement. Regards, Dieter
--- End quote ---
The only way out of their silly planar wave etc mess is if they use a fiducial marker of some kind to establish a zero point or a max point or somesuch.
This would automatically overcome lots of known shortcomings & praps non-known shortcomings.
The fiducial marker could enable simple analysis at any one location. And it might enable simpler analyses tween locations.
And then they could continue to crow about their naïve stupid skoolkid planar wavefronts, whilst actually not needing planar wavefronts & not using planar wavefronts.
The original Sagnac spinning mirrors X successfully used a fiducial zero marker.  It was the midpoint tween max fringe shifts on each exposed half of the photo, one half for each direction of spin.
Sagnac used his fiducial marker to help to show that the aetherwind existed.
The horizon team could use a fiducial marker for the opposite reason to Sagnac, they could use it to obviate the aetherwind.
https://en.wikipedia.org/wiki/Fiducial_marker

aetherist:
Well what do u know, a fiducial blackhole.

https://www.haystack.mit.edu/wp-content/uploads/2020/11/NEROC2020_Akiyama_slides_web.pdf

aetherist:
https://arxiv.org/pdf/2202.04472.pdf

.....to simulate its full azimuthal extent; by contrast, we have truncated the polar range near the symmetry
axis to minimize numerical difficulties associated with having the polar axis in the domain. Our fiducial 2D and 3D
runs do not have synchrotron cooling. In the following, we
denote by me the mass of the electron.....

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