Sentinel Online

@sentinelonline.bsky.social

Official profile of Sentinel Online, part of Copernicus, the European Union’s Earth Observation programme, and developed in partnership with @esa.int

@sentinelonline.bsky.social Oct 9, 2026, 7:26 AM

#Sentinel3 Level-2 Land Surface Temperature NTC (non-time critical) products are now available in #CopernicusEU Browser and the Sentinel Hub API.

Read the full article: sentinels.copernicus.eu/web/sentinel...

#ESA#SLSTR #SentinelOnline

@sentinelonline.bsky.social Oct 7, 2026, 10:29 AM

Have you used #CopernicusEU #Sentinel data in your research, product or service, and seen it make a difference? 🛰️ We'd like to feature your story on #SentinelOnline.
Reach out to the editorial team at
📩 [email protected] with a short description of your project.

@sentinelonline.bsky.social Oct 1, 2026, 12:18 PM

From 21 to 24 September, the altimetry community met in Longyearbyen, Svalbard, for #VOCALIS2026, the workshop on Validation of Operational #CopernicusEU Altimetry over Land water and Ice Surface.
Read the full success story on Sentinel Online: sentinels.copernicus.eu/web/success-...

@sentinelonline.bsky.social Sep 24, 2026, 3:26 PM

#VOCALIS2026 has closed in Longyearbyen, #Svalbard
Four days, one shared goal: making #CopernicusEU altimetry over ice and water as accurate as the science needs it to be.
Thank you to everyone who took part.

#Sentinel3 #CRISTAL #CIMR #CalVal #Svalbard #Arctic #EarthObservation #ESA

@sentinelonline.bsky.social Sep 23, 2026, 3:44 PM

The discussion reinforced a key message: ensuring high-quality #EarthObservation products depends on strong links between #space-based and #in-situ observations.

Three panellists listen during the discussion, with a live poll on the screen behind them. Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

Panellists look up at the poll results while one answers into a microphone and the moderator stands by the podium. Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

The moderator stands with a microphone beside seven seated panellists, as a live poll on bottlenecks limiting the operational use of in-situ observations by Copernicus shows on the screen. Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

Four panellists sit in front of the screen during the in-situ panel, one speaking into a microphone while another takes notes. Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

@sentinelonline.bsky.social Sep 23, 2026, 3:44 PM

Day 3 at #VOCALIS2026 highlighted the importance of Arctic in-situ observations. The #Copernicus In-Situ session concluded with a panel discussion on “Addressing Critical Arctic In-Situ Gaps for Copernicus: What role for Svalbard?”.

A speaker at the podium presents a table titled "How accurate is Sentinel-3 on rivers?", comparing retrackers, validated stations and errors against in-situ gauges.Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

A panel seated in front of a slide introducing the Copernicus Polar Roadmap and the gaps it identifies in Arctic observations.Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

A speaker with a microphone presents a slide titled "Sentinel-3 altimetry for inland waters, lessons learned and perspectives for the CRISTAL mission”. Logos of VOCALIS 2026, the EU, ESA, Copernicus, NOVELTIS, UNIS and SIOS along the bottom.

@sentinelonline.bsky.social Sep 22, 2026, 3:00 PM

Day two of #VOCALIS2026 has wrapped up in Svalbard

Sea ice and land ice sessions covered freeboard, snow depth, ice sheet validation and new #Sentinel-3 FRM results from Antarctica, all feeding into #CRISTAL Cal/Val preparation.

Tomorrow: inland waters and Copernicus in-situ.

A speaker at the podium presents a slide titled "Ku-band radar penetration in snow" on saline snow over first-year ice, while the session chairs listen from a table beside the screen.

Participants lean in during a discussion in the auditorium, laptops open, one decorated with a Sentinel-2 sticker.

A participant wearing a headset microphone smiles as he speaks during a session, while a seated colleague beside him listens.

Participants in warm jackets and hats talk in groups inside a wooden hall with large windows looking out onto fog.

@sentinelonline.bsky.social Sep 22, 2026, 9:07 AM

#VOCALIS2026 opened yesterday in Svalbard, and runs until 25 September
@esa.int , #NOVELTIS and #UNIS bring together the CRISTAL IN-PROVA and ST3TART-FO teams to validate #Sentinel-3 and prepare CRISTAL Cal/Val over sea ice, land ice and inland waters.
🔗 vocalis2026-workshop.noveltis.fr

@sentinelonline.bsky.social Sep 18, 2026, 8:24 AM

Following the previous announcement on the deployment of #CopernicusEU #Sentinel-2 Processing Baseline 05.13, scheduled for 21 September 2026, #ESA is pleased to provide further operational details on the transition.

🔗 Read the full article: sentinels.copernicus.eu/web/sentinel...

@sentinelonline.bsky.social Sep 17, 2026, 7:38 AM

Successful launch of #CopernicusEU #Sentinel-3C.

Vega-C VV30 lifted off from Kourou at 03:21 CEST on 15 September with #Sentinel-3C and ESA's #FLEX.

Watch the recording: youtu.be/EdEfWsrnuVU?...

Full Story: sentinels.copernicus.eu/web/success-...

@sentinelonline.bsky.social Sep 16, 2026, 8:05 AM

New guidelines released on Cal/Val and Fiducial Reference Measurements (FRMs) for the #CopernicusEU #Sentinel missions

Covers all operational Sentinels plus the upcoming Expansion Missions, with FRM success examples.

#ESA #CalVal

@sentinelonline.bsky.social Sep 15, 2026, 1:00 AM

We are live.
Coverage of Vega-C flight VV30 has begun. Copernicus Sentinel-3C lifts off from Europe's Spaceport in Kourou at 03:21 CEST (01:21 UTC).

Watch live: sentinels.copernicus.eu

#Copernicus #Sentinel3 #EarthObservation #ESA #EUSpace

@sentinelonline.bsky.social Sep 14, 2026, 6:15 PM

7 hours to launch. #Sentinel-3C lifts off on Vega-C from Kourou at 22:21 local time on 14 September, 03:21 CEST on 15 September.

A reminder that you can follow the launch live on sentinels.copernicus.eu

#CopernicusEU #ESA #EUSpace

@sentinelonline.bsky.social Sep 13, 2026, 11:34 AM

38 hours to lift-off.

#CopernicusEU #Sentinel-3C launches on 14 September at 22:21 in French Guiana, on Vega-C flight VV30. In Europe that is 03:21 CEST in the early hours of 15 September.

#EUSpace #EarthObservation

Credit: ESA - S. Corvaja

@sentinelonline.bsky.social Sep 10, 2026, 8:11 AM

#CopernicusEU #Sentinel-3C launches on 15 September at 03:21 CEST.
Live broadcast from 02:50 CEST on sentinels.copernicus.eu.
Sentinel-3C joins 3A and 3B, continuing global measurements of sea surface height, sea and land temperature, and ocean and land colour.
Credit:ESA-P. Carril.
#EUSpace #ESA

Artist's impression of the Copernicus Sentinel-3C satellite drifting free of its launcher fairing high above Earth. The two fairing halves fall away to either side, the satellite's blue solar panel catches the light, and the curve of the planet glows below. Overlaid text reads: Watch live. Sentinel-3C goes to space. 15 September 2026, 03:21 CEST. Credit ESA-P. Carril.

@sentinelonline.bsky.social Sep 7, 2026, 10:24 AM

On 14 September 2026 at 22:21 in French Guiana (01:21 UTC, 03:21 CEST on 15 September), #Sentinel-3C lifts off on #Vega-C.

Third satellite of the #CopernicusEU #Sentinel-3 constellation, heading for a Sun-synchronous orbit around 815 km.

#ESA #EUMETSAT #SentinelOnline

@sentinelonline.bsky.social Sep 4, 2026, 2:57 PM

#ESA is pleased to announce the forthcoming deployment of #CopernicusEU #Sentinel2 Processing Baseline 05.13, scheduled for 21 September 2026.
🔗 Read the full article: sentinels.copernicus.eu/web/sentinel...

@sentinelonline.bsky.social Aug 18, 2026, 12:05 PM

#Sentinel-3 and #Sentinel-2 captured the Serbian #wildfires near Belgrade on 8 Aug, wide-area monitoring meets high-res detail at Deliblato Sands.

#EarthObservation #SentinelOnline

Credit: contains modified #CopernicusEU #Sentinel data (2026), processed by #ESA.