Simon Proud
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simonsat.bsky.social
Simon Proud
@simonsat.bsky.social

I work at the European Space Agency as the mission scientist for the Sentinel-2 and Sentinel-3 next generation missions.

I mainly post nice pictures of the Earth from space!

Note: Not an official ESA account, opinions are my own and mine alone!
Small update to say that the mission performance centre are investigating this - will report back when I have any news :)
January 12, 2026 at 8:42 AM
Interesting, thanks. My municipality (Voorschoten) obviously sucks when it comes to snow machines 😂
January 5, 2026 at 4:18 PM
Yes, exactly- this is my point. Cars prioritised and inadequate services for bikes and public transport. Is disappointing compared to other similar countries.
January 5, 2026 at 11:04 AM
I must say I was disappointed! Expected the Dutch authorities to clear the cycle lanes, but they only cleared / gritted the car lanes - cycle lanes filled with slushy snow and ice.
January 5, 2026 at 9:41 AM
Good idea! I'll try to do one after Christmas...but may need a reminder ;-)

Hope you have a good break too!
December 22, 2025 at 5:10 PM
Yes indeed, which is why I'm confused! But it looks very much like an artefact related to the atmospheric correction and the scene geometry (most likely solar zenith angle). Maybe some numerical precision thing? Will be easier to tell when I see the data :)
December 17, 2025 at 8:16 PM
@kosmi.bsky.social could you provide a link to the L2A scene on the brower, including whatever band division you did to highlight the artefacts?
I will forward it to the data quality team and get their feedback.
December 17, 2025 at 7:42 PM
I would say the opposite! :)
My first guess would be that this is an artefact introduced by the atmospheric correction, most likely tie points in the lookup tables.
December 17, 2025 at 7:38 PM
I do both of these things many times each week. It's not a problem.
November 10, 2025 at 10:59 AM
Yeah, L1C also has the artifacts - caused by differing detector geometry. Only the L1b can fix it.

very niche so doesn’t make too much difference though, just bugs the perfectionist in me!

Really great that the imagery is on the browser so quickly. Will be super useful for the disaster response.
October 28, 2025 at 8:48 PM
Looks good - but unfortunately the browser introduces some artefacts as it's using the L2 data.
October 28, 2025 at 8:42 PM