HagollEO
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hagolleo.bsky.social
HagollEO
@hagolleo.bsky.social
Researcher @cesbio lab, where we watch 🌱 grow with 🛰️

Engineer @CNES, the French Space Agency

On Mastodon : @[email protected]
Optical #remotesensing, #Sentinel2, atmospheric correction and ☁️ masking. 🎹🚲
Views are my own
November 2, 2025 at 9:09 AM
Incredible cloud bird, captured tonight biking back from work (near #Toulouse)
#photography #landscapePhotography
#cloud
September 23, 2025 at 7:26 PM
August 10, 2025 at 6:22 AM
August 5, 2025 at 4:23 AM
Even better a few minutes later 🤩
August 2, 2025 at 9:16 PM
Nice clouds near Montpellier too tonight ;)
August 2, 2025 at 7:13 PM
From Andreas Brink and Usue Donezar at #LPS25, presented at #Sentinel2 10th birthday session.
June 23, 2025 at 1:06 PM
So am I... Still an hour to go
June 21, 2025 at 7:52 AM
On my way to #LPS25, by train, from Toulouse, via Paris. 22 hours, I started at noon. This should still leave me some time to visit Vienna before the conference.

3 presentations :
- Monday pm : S2 10th birthday session
- Friday am : Land Surface Temperature session
- Friday pm: future missions
June 20, 2025 at 2:35 PM
#Sentinel2 -A is back for 12 months, together with S2B and S2C !
Many thanks to #Copernicus and @esa.int, and to all those who asked for it in our petition.
March 14, 2025 at 2:49 PM
Viejo Francés parece tener otra solución (50+3+4). En el castillo Real de Vincennes al lado de París.
March 5, 2025 at 12:55 PM
January 27, 2025 at 6:37 AM
January 9, 2025 at 7:05 AM
Good news ! #Sentinel2 -C data have started to appear on the copernicus dataspace. S2C is close to S2A, as the same footprints are acquired 30s apart. 👍👍
A good opportunity to see how things change in 30 s.
December 13, 2024 at 6:13 PM
Pas tout à fait d'accord, mais je comprends le besoin de simplifier. Ce qui change "près du soleil", c'est surtout la fonction de phase des aérosols, qui sont moins bleus que les molécules et diffusent principalement vers l'avant. "Près du soleil" on voit surtout des aérosols, moins bleus.
December 3, 2024 at 8:51 PM
#HelloESR je préfère #mastodon, mais puisque vous êtes tous ici...
Je suis ingénieur au @CNES et chercheur au laboratoire #Cesbio. Au CESBIO, on regarde pousser les 🌱🌿☘️, mais avec des satellites. Mon #satellite préféré est #Sentinel2 et je bichonne ses images pour qu'elles soient faciles à utiliser.
November 19, 2024 at 9:27 PM
The validation has been performed with in-situ data and compared to the state of the art BV-NNET. If LAI estimates are equivalent, the chlorophyll canopy content is much more accurately retrieved. Moreover, the training avoided the necessity to define realistic variable distributions.
November 14, 2024 at 4:51 PM
A new and efficient selfsupervised method to obtain LAI and chlorophyll content from #Sentinel2 by Y.Zerah ! A Variational Auto Encoder was used in which the decoder is the PROSAIL simulator. The obtained embedded variables are therefore the inputs of PROSAIL.
www.cesbio.cnrs.fr/multitemp/bi... ⬇️
November 14, 2024 at 4:51 PM
C'est beau aussi dans les Pyrénées, les hêtre prennent de belles couleurs, avec les premières neiges en prime. Ici, le pic de Girabal, 2139 m.
October 22, 2024 at 1:08 PM