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Sky lapse in two tone

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Re: Sky lapse in two tone

#31

Post by jpm_sd »

Cthulhu_ wrote: post #25
algo_trader wrote: post #22

Off topic: are there datasets for solar incidence over the oceans ? There are plenty of accurate maps/widgets for ground based PV, but ocean data seems much rarer

That's because ocean PV is... unrealistic; the wear and tear on these things is immense. I am guessing windmills are affected less, with the blades being made out of fiberglass and most of the construction being above the waves. Source: I made it up, I'm a software engineer not a maritime power expert.

I worked on a "floating solar" project at Google and you're completely correct.

Also, waterproofing is a nightmare, and the panels get dirty (salt, algae, bird shit) and stop producing power efficiently.

Re: Sky lapse in two tone

#32

Post by buzzm »

mysterypie wrote: post #21
hardlianotion wrote: post #3

I had no idea shipping lanes were so densely populated. EDIT - thanks all. I'll read it next time ...

Here's a site that does live tracking of ships: https://www.marinetraffic.com/en/ais/home/centerx:1.7/center... "Since December 2004, the International Maritime Organisation (IMO) requires all passenger and commercial vessels over 299 Gross Tonnage that travel internationally to carry an AIS transponder that include a GPS receiver which collects the vessel's position and movement details." Counting across the longest…

Outstanding link; thanks for sharing.

Re: Sky lapse in two tone

#33

Post by moxli »

There is a NGO in Germany (Space-Eye) working with satellite images for search and rescue purposes.

I know from some people involved there that they are always looking for developers and data scientists.

The main page is in German but the call for volunteers (you need to scroll down to "Volunteers for Space-Eye") is in English.

[1] https://space-eye.org/satelliten-erkundung

Re: Sky lapse in two tone

#34

Post by electricships »

jpm_sd wrote: post #31
Cthulhu_ wrote: post #25

Earlier quoted context omitted.

That's because ocean PV is... unrealistic; the wear and tear on these things is immense. I am guessing windmills are affected less, with the blades being made out of fiberglass and most of the construction being above the waves. Source: I made it up, I'm a software engineer not a maritime power expert.

I worked on a "floating solar" project at Google and you're completely correct. Also, waterproofing is a nightmare, and the panels get dirty (salt, algae, bird shit) and stop producing power efficiently.

how much higher is the capex for deep sea floating structure ?

(i guess stuff like o&m, grid connection and yield are really project dependent)

edit: solar duck just announced 150mw combined pv wind project

Re: Sky lapse in two tone

#35

Post by cmos »

jpm_sd wrote: post #31
Cthulhu_ wrote: post #25

Earlier quoted context omitted.

That's because ocean PV is... unrealistic; the wear and tear on these things is immense. I am guessing windmills are affected less, with the blades being made out of fiberglass and most of the construction being above the waves. Source: I made it up, I'm a software engineer not a maritime power expert.

I worked on a "floating solar" project at Google and you're completely correct. Also, waterproofing is a nightmare, and the panels get dirty (salt, algae, bird shit) and stop producing power efficiently.

I work in Oceanography.. The solar panels on individual buoys also get cleaned by rain, and can work ok vertically because of reflections. We have special diode bypass panels made so if 10% is covered in poop (SeaLion poop in our case) only 10% of the power is reduced.

Our biggest problem with small wind turbines on buoys is fishingpeople throwing line into them.

But yea, solar for power generation at sea is not realistic.. and you are stealing it from the tiny animals that make up our carbon sink. https://twilightzone.whoi.edu/explore-the-otz/value-of-the-o...

Re: Sky lapse in two tone

#36

Post by fithisux »

m2fkxy wrote: post #30
fithisux wrote: post #28

Earlier quoted context omitted.

Any good source for SAR image formation? From antennas to image processing?

I am just a half-educated layman when it comes to SAR, which has a very heavy electrical engineering heritage. I hear that one very good technical resource is this book written by Iain Woodhouse [1], but I would be lucky to understand a tenth of it myself. There is also a very good SAR vulgarisation book written by Tom Ager [2]. [1] https://www.routledge.com/Introduction-to-Microwave-Remote-S... [2] https://www.amazo…

thank you very much
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