Sky lapse in two tone
blog.datadesk.eco
Sky lapse in two tone
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Re: Sky lapse in two tone
#2[deleted]
Re: Sky lapse in two tone
#3I had no idea shipping lanes were so densely populated.
EDIT - thanks all. I'll read it next time ...
Re: Sky lapse in two tone
#4Technical SAR question: Is the sea surface removed post-hoc, or does the sea not reflect these radar waves in a sufficient amount to show up? I seem to remember NISAR [1] will map land and ice - so presumably water ice shows up.
I ask b/c if they are synthetically removing the sea surface at 1-5m resolution that seems really hard given tides, waves, etc.
Re: Sky lapse in two tone
#5I wonder at what density of wind farms they begin to interfere with each other's generating capacity. Presumably within one farm the turbines are sufficiently spaced that the reduction in power is minimal, but how large can an individual one get? Or is the amount of energy they take out of the wind negligable?
Re: Sky lapse in two tone
#6I had no idea shipping lanes were so densely populated. EDIT - thanks all. I'll read it next time ...
Those are composite renders, integrating over time, not a snapshot.
> Created in Google Earth Engine, these pictures are effectively annual timelapse images based on Sentinel-1’s radar, consisting of multiple snapshots taken by the satellite across 2023.
Re: Sky lapse in two tone
#7I had no idea shipping lanes were so densely populated. EDIT - thanks all. I'll read it next time ...
To quote the article:
> Inspired by some similar images shared by Tim Wallace in 2020, we’ve created a series of black-and-white composite renderings of some of the points of flux in the global energy system. Created in Google Earth Engine, these pictures are effectively annual timelapse images based on Sentinel-1’s radar, consisting of multiple snapshots taken by the satellite across 2023.
Not sure if the wind farm images are also composites (wouldn't make a lot of sense), but those of shipping lanes definitely are...
Re: Sky lapse in two tone
#8I had no idea shipping lanes were so densely populated. EDIT - thanks all. I'll read it next time ...
These are composites, although it's not clear exactly how many images are composed to build the final view.
Re: Sky lapse in two tone
#9I wonder at what density of wind farms they begin to interfere with each other's generating capacity. Presumably within one farm the turbines are sufficiently spaced that the reduction in power is minimal, but how large can an individual one get? Or is the amount of energy they take out of the wind negligable?
You pretty much answered your own question: compared to the size of the coast, the amount of energy these wind farms capture is negligible. You might see a reduction of power if you built a dense farm up and down an entire coast, but even then, the ocean is big compared to these farms.
Edit to add: the Hornsea wind farm featured in this article is 2.5 GW and about 400 sq miles. [0]. The total energy capacity of existing generation assets is on the order of 7,500 GW [1]. Let's double that, so 15,000 GW, which would be about 2,400,000 sq miles. There's 1,015,756 linear miles of coast [2]. We know Hornsea is roughly square, so a 20 mile deep set of turbines doesn't interfere with each other, so that gives us ~20,000,000 sq miles of usable coast for wind, and again, if we double the existing electrical generation for the earth, we'd cover 2,400,000 sq miles. (obviously not all of that is usable, but we're talking orders of magnitude here) There's really no conceivable situation where we'd build enough wind farms to interfere with each other.
[0] https://en.wikipedia.org/wiki/Hornsea_Wind_Farm
[1] https://www.statista.com/statistics/267358/world-installed-p...
Re: Sky lapse in two tone
#10Technical SAR question: Is the sea surface removed post-hoc, or does the sea not reflect these radar waves in a sufficient amount to show up? I seem to remember NISAR [1] will map land and ice - so presumably water ice shows up. I ask b/c if they are synthetically removing the sea surface at 1-5m resolution that seems really hard given tides, waves, etc. 1. https://en.wikipedia.org/wiki/NISAR_(satellite)
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