Updates Sentinel News

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ESA tv is live.

ESA - ESA Web TV

 

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Iceberg closing in.

ESA - Iceberg A-68A: hit or miss?

 

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Pics of A-68A.

RAF releases video of world's biggest iceberg - BBC News

 

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The new satellite that will become the primary orbital tool for tracking sea-level rise is in excellent shape.
Sentinel-6 "Michael Freilich" was only launched three weeks ago, but already it is mapping ocean features in exquisite detail.
The dog kennel-shaped spacecraft is a joint endeavour between Europe and the US.
It is the latest iteration in a series of missions that have been measuring sea-surface height going back to 1992.

'Dog kennel' satellite returns first ocean observations - BBC News

 

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A68a iceberg: Science mission to investigate frozen giant - BBC News

 

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Giant iceberg A68a shatters into large fragments - BBC News

 

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Climate change: Weakened 'ice arches' speed loss of Arctic floes - BBC News

 

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Radar images capture new Antarctic mega-iceberg - BBC News

Radar satellites got their first good look at Antarctica's new mega-iceberg over the weekend.
The EU's Sentinel-1 and Germany's TerraSAR-X spacecraft both had passes over the 1,290-sq-km (500-sq-mile) block, informally named "A74".
Their sensors showed the berg to have moved rapidly away from the Brunt Ice Shelf - the floating platform from which it calved on Friday.
The good news is that no disturbance was felt at the UK's nearby base.
The Halley research station is sited just over 20km from the line of fracture, but GPS stations installed around the facility reported continued stability.

 

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Mega-iceberg A74: German ship squeezes through narrow ice channel - BBC News

The German Research Vessel Polarstern has made a remarkable circumnavigation of Antarctica's latest mega-iceberg.
The ship sailed a complete circuit of the 1,290-sq-km (500 sq miles) frozen block, known as A74, at the weekend.
To do so, RV Polarstern had to navigate the very narrow channel that separates A74 from the Brunt Ice Shelf - the frozen floating platform from which the berg broke two weeks ago.
The EU's Sentinel-2 satellite managed to image the ship in the process.

 

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Antarctic seafloor exposed after 50 years of ice cover - BBC News

 

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A68: Iceberg that became a social media star melts away​

A68: Iceberg that became a social media star melts away

The billion-tonne colossus known as A68 has so thoroughly fragmented it's no longer being tracked.

www.bbc.co.uk

 

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Giant iceberg A74 kisses the Antarctic coast.​

Giant iceberg A74 kisses the Antarctic coast

A colossus almost the size of Greater London gives the Antarctic coastline the gentlest of nudges.

www.bbc.co.uk

 

[Sbb1413]

Giant iceberg A74 kisses the Antarctic coast.

I thank to the climate change to make this possible. When my dad was born, the entire Antarctica was frozen all year. This is the climate change that melt some parts of it to form such big icebergs.

 

[Urwumpe]

Bad news: Sentinel-1B will remain defunct after it failed on the 23rd December. The reason are severe issues with the power supply, that need more time to be investigated. It is still under control and no space debris, but the power available on the satellite is not enough to operate its science payload.

 

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Bye bye Sentinel.
Some other iceberg news.

How a colossal block of ice became an obsession

Artist Kevin Eason won't ever see his favourite iceberg up close, but he's come to know it so well.

www.bbc.co.uk

 

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A68: 'Megaberg' dumped huge volume of fresh water

The melting monster iceberg A68 put 1.5 billion tonnes of fresh water into the ocean every day.

www.bbc.co.uk

 

[mahdavi3d]

ESA ends efforts to recover Sentinel-1B​

A summary of the investigation into the SAR payload failure concluded that two 28-volt power regulators for the SAR payload malfunctioned. One is needed to operate the payload. Efforts to restore them failed other than one case in April when the main regulator turned on for 4.4 seconds before turning off again. That provided “valuable observations to identify possible failure modes,” the summary stated.

“Our focus is on fast-tracking the launch of Sentinel-1C,” Cheli said in the statement. “Now, thanks to the successful inaugural flight of the Vega-C rocket on 13 July, we, with Arianespace, are targeting the launch in the second quarter of 2023.” There was discussion early in the year, though, of moving up the Sentinel-1C launch to as soon as late this year.

Despite the failure of its SAR payload, the Sentinel-1B spacecraft itself remains operational. “We have Sentinel-1B under control,” Alistair O’Connell, Sentinel-1 spacecraft operations manager, said in a statement. “We perform regular monitoring of the spacecraft health and routine orbit control maneuvers.”

ESA will deorbit Sentinel-1B after the launch of Sentinel-1C. O’Connell said the spacecraft will comply with orbital debris mitigation guidelines that call for spacecraft to be deorbited within 25 years of the end of its mission. “In practice, the reentry duration is expected to be much shorter,” he said.

 

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Clouds part to reveal colossal Antarctic iceberg

The EU's Sentinel-2 satellite obtains a crystal clear image of Antarctica's new monster iceberg.

www.bbc.co.uk

 

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"Climate change: Thousands of penguins die in Antarctic ice breakup"

Climate change: Thousands of penguins die in Antarctic ice breakup

Vast numbers of emperor penguin chicks drown as sea-ice melts and collapses underneath them.

www.bbc.co.uk

 

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Halley station: Rapid ice movement monitored under UK polar base​

Halley station: Rapid ice movement monitored under UK polar base

Scientists record an abrupt acceleration of floating ice hosting the Halley station, in Antarctica.

www.bbc.com