Tag: satellite

What Happens When NASA Loses Eyes on Earth? We’re About to Find Out.

Posted on by Lone Candle

“Sometime in the next few years — no one knows exactly when — three NASA satellites, each one as heavy as an elephant, will go dark.
Already they are drifting, losing height bit by bit. They have been gazing down at the planet for over two decades, far longer than anyone expected, helping us forecast the weather, manage wildfires, monitor oil spills and more. But age is catching up to them, and soon they will send their last transmissions and begin their slow, final fall to Earth.

It’s a moment scientists are dreading.

Sign up for The Morning newsletter from the New York Times

When the three orbiters — Terra, Aqua and Aura — are powered down, much of the data they’ve been collecting will end with them, and newer satellites won’t pick up all of the slack. Researchers will either have to rely on alternate sources that might not meet their exact needs or seek workarounds to allow their records to continue.

With some of the data these satellites gather, the situation is even worse: No other instruments will keep collecting it. In a few short years, the fine features they reveal about our world will become much fuzzier.

“Losing this irreplaceable data is simply tragic,” said Susan Solomon, an atmospheric chemist at the Massachusetts Institute of Technology. “Just when the planet most needs for us to focus on understanding how we are affected by it, and how we are affecting it, we seem to be disastrously asleep at the wheel.”

The main area we’re losing eyes on is the stratosphere, the all-important home of the ozone layer.”

https://www.yahoo.com/news/happens-nasa-loses-eyes-earth-122602124.html

Putin’s deadliest weapon yet has been revealed – and the West has no answer

Posted on by Lone Candle

“According to US intelligence, Russia wants to put a nuclear weapon into space. Such a weapons system, they believe, could be used to target Western satellites in orbit, knocking out communications and military targeting systems. These weapons would be utterly devastating if they were ever used.
Axiomatically, it makes a lot of sense to use nuclear weapons in space: the result of doing so is far more predictable than on land, where geography and the elements can make their deployment tricky. The outcome is also more calculable: given we are so reliant on satellites to communicate, move, and work, we would all feel the impact.

It’s for this reason the world has long agreed not to put such weapons in the ‘heavens’. But we know the tyrant Putin is no respecter of the rule book and international law. The development of so-called ‘Wunderwaffe’ – “wonder weapons” – is one of Putin’s obsessions. The fact this information is coming from US intelligence sources, not Putin’s usual idle boasts, suggest they at least have a grain of truth about them, though, and should be taken seriously. Very seriously.”

https://www.yahoo.com/news/putins-deadliest-weapon-yet-revealed-154624863.html

Solar Storm Knocks 40 SpaceX Satellites Out of the Sky, After the Company Ignored Scientists’ Warnings

Posted on by Lone Candle

“When energy from a solar storm reaches Earth, it causes the atmosphere to expand slightly, meaning that satellites flying in what would normally be a safe, 209 km parking orbit are suddenly encountering a lot of air resistance that can pull them back to the ground. SpaceX was aware of the problem as soon as the 49 satellites reached space and attempted to ride out the storm, positioning the relatively flat-shaped spacecraft edge-forward, to minimize air resistance.”

…

“But in this case physics has a bigger vote than SpaceX, and the safe-mode maneuver worked for only nine of the fleet of 49. The others were effectively clawed out of the sky and are already reentering the atmosphere or will begin to do so by the end of the week.”