The evolution of the Sentinel Collaborative Ground Segment
12 January 2017
ESA and its Member States created the Sentinel Collaborative Ground Segment (CollGS) to further enhance the Sentinel missions exploitation in various areas. Today, the cooperation is also open to all European countries and Copernicus Participating States.
Besides the challenging task of building and launching a satellite, a key indicator of the success of an Earth observation mission relies on ensuring that the data gathered are of good quality and made easily available to users.
These functions are all ensured by the Copernicus Space Component (CSC) Ground Segment.
The Sentinel Collaborative Ground Segment complements the Copernicus Ground Segment. This entails additional elements for specialised solutions in different technological areas, such as data acquisition, complementary production and dissemination.
But what does the CollGS do, exactly?
- National entities can build-up their own mirror data archive and base operational services on Sentinel data. Participating countries then redistribute the Sentinel data and/or value added products from their “mirror sites”, to institutional, commercial and science users.
- Many mirror sites in place are now also adding hosted processing to their services.
- If technically required to meet data timeliness obligations, local ground stations are configured to listen-in as Sentinel data is downlinked to core ground stations. This allows for quasi-real time product generation as, for instance, in supporting marine surveillance activities in the Baltic Sea.
- Furthermore, in the frame of the CollGS, national initiatives carry out the development of innovative tools and applications.
Canada, which is an associate ESA Member State, operates extremely important land and maritime monitoring activities, with C-CORE and other organisations. Having established a CollGS agreement, they can access the Sentinel products via a data hub operated by ESA and dedicated to collaborative partners.
Shahid Khurshid, Physical Scientist at Meteorological Service of Canada, and Matt Arkett, Acting Manager of Earth Observation and Geomatics, at Environment and Climate Change Canada, said: “Environment and Climate Change Canada’s Operational National SAR Winds (NSW) system provides near real-time delivery of marine wind measurements derived from spaceborne synthetic aperture Radars (SAR) to support marine forecasters & other applications.
“The programme has been operational since 2013, ingesting SAR data from the RADARSAT-1 and RADARSAT-2 missions. The NSW system began to generate operational surface wind maps using Sentinel-1A data in April 2016 and Sentinel-1B in September 2016.
“Access to Sentinel-1 data has significantly increased the temporal and spatial frequency of marine wind speed information being delivered to our operational marine forecasters.
- Copernicus Sentinel-1A unavailability December 10, 2018 4:23 pmCopernicus Sentinel-1A was unavailable from 9 December 2018 18:53 UTC to 10 December 2018 08:57 UTC, due to a SAR anomaly.
- Copernicus Sentinel-1A unavailability December 6, 2018 1:56 pmCopernicus Sentinel-1A was unavailable from 5 December 2018 23:45 UTC to 6 December 2018 09:29 UTC, due to a SAR anomaly.
- Copernicus Sentinel-1B unavailability on 26 November 2018 November 26, 2018 12:45 pmCopernicus Sentinel-1B was unavailable on 26 November 2018 from 09:58 to 11:43 UTC, due to the need to perform a reset of the on-board PDHT memory.
- Data Hub maintenance on 5 and 6 November 2018 October 31, 2018 11:58 amAn unavoidable maintenance activity on the core infrastructure hosting the data hub service, involving replacement of switches interconnecting the servers to the rolling archive storage, is scheduled from 13:30 UTC on Monday 5 November to 11:00 UTC on 6 November 2018.
- Copernicus Sentinel-1 catches Norwegian spring floods - in autumn October 30, 2018 10:46 amSpring floods occur when snow melts over large areas in short time periods, often combined with rain-so-called rain-on-snow events that add water, further intensifying snow melt. As their name suggests, such floods typically occur in spring - except for a few weeks ago, when Southern Norway was struck with this phenomenon.
- Copernicus Sentinel-1 reveals new insight on tropical cyclones October 18, 2018 7:01 amA team of experts from the French institutes IFREMER and CLS recently implemented a strategy with ESA, in order to acquire Sentinel-1 images over tropical cyclones, while developing an algorithm that enables the extraction of hurricane characteristics at a very high resolution from space. Information such as the ocean surface wind field provided at 1 km resolution could trigger perspectives for improving hurricane forecast information.
- Sentinel-1A collision avoidance manoeuvres on 25 September 2018 September 26, 2018 7:30 amCollision avoidance manoeuvres were executed on Sentinel-1A to reduce the risk of collision with a debris, potentially occurring at 21:49 UTC on 25 September 2018.
- Copernicus Sentinel maps Florence hurricane flood September 17, 2018 3:31 pmMaking landfall in the US state of North Carolina on 14 September, Hurricane Florence is causing widespread damage and flooding. The Copernicus Sentinel-1 radar mission is being used to map affected areas.
- Copernicus Sentinel-1 helps monitor oil industry activity September 14, 2018 6:56 amAn innovative data analytics company in France is using data from the Copernicus Sentinel-1 satellites to help track crude oil storage worldwide, bringing transparency to the energy markets.
- Data Hub Infrastructure maintenance activities on 5 and 6 September 2018 September 3, 2018 9:59 amInfrastructure maintenance activities are scheduled on Wednesday, 5 September 2018 from 07:00 to 16:00 UTC and on Thursday, 6 September 2018 from 07:00 to 10:00 UTC.
- Sentinel-1A unavailability on 28 August 2018 August 30, 2018 11:14 amSentinel-1A was unavailable from 28 August 2018 at 17:27 UTC to 29 August 2018 at 7:27 UTC, due to a SAR anomaly. No data were generated during this period.
- Open Access Hub maintenance on 27-28 August 2018 August 22, 2018 4:09 pmOpen Access Hub users are informed that a maintenance activity is scheduled on 27 and 28 August 2018 for upgrading the DHuS databases and software version on the following access points: SciHub API Hub
- Sentinel-1A unavailability on 13 August 2018 August 13, 2018 1:39 pmSentinel-1A was unavailable on 13 August 2018 from 07:59 to 11:21 UTC, due to the need to perform a reset of the on-board PDHT memory.
- Sentinel-1B collision avoidance manoeuvres on 5 August 2018 August 6, 2018 8:01 amCollision avoidance manoeuvres were executed on Sentinel-1B on 5 August 2018 to reduce the risk of collision with an unknown object, potentially occurring at 09:33 UTC on 5 August.
- Sentinel-1 maps flash floods in Laos July 31, 2018 10:10 amCopernicus Sentinel-1 data are highlighting the collapse of the Xe-Pian Xe-Namnoy dam in the southeastern province of Attapeu in Laos.
- It’s all go in summer for Greenland’s glaciers July 16, 2018 2:09 pmThe Copernicus Sentinel-1 mission has revealed that, on average, Greenland's glaciers are now flowing more slowly into the Arctic Ocean. While glacial flow may have slowed overall, in summer glaciers flow 25% faster than they do in the winter.
- Sentinel-1A unavailability on 06 July 2018 July 9, 2018 6:35 amSentinel-1A was unavailable on 06 July 2018 from 11:30 to 13:11 UTC, due to the need to reset the Payload Data Handling and Transmission (PDHT) system. No SAR observations took place during this period. Data acquired a few hours before this period may have been affected as well.
- Sentinel-1B collision avoidance manoeuvres on 29 June 2018 July 3, 2018 7:24 amCollision avoidance manoeuvres were executed on Sentinel-1B to reduce the risk of collision with an Iridium 33 fragmentation debris, potentially occurring on 29 June 2018 at 22:22 UTC.
- Sentinel-1A unavailability on 29 June 2018 July 3, 2018 7:09 amSentinel-1A was unavailable on 29 June from 16:27 to 18:16 UTC, due to the need to reset the Payload Data Handling and Transmission (PDHT) system. No SAR observations took place during this period. Data acquired a few hours before this period may have been affected as well.
- Data Hub maintenance on 18 and 19 June 2018 June 14, 2018 2:56 pmInfrastructure maintenance activities are scheduled on the Data Hubs from 12:00 UTC on 18 June to 10:00 UTC on 19 June 2018.