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Biden delays satellite traffic control as near-misses rise

June 3, 2021
The US isn’t keeping up with the proliferation of new spacecraft in low-earth orbit, and the potential consequences are serious.
Megaconstellations, like those developed by SpaceX and OneWeb, will add tens of thousands of new satellites to the environment around the planet. University of Southampton professor Hugh Lewis used data from the Center for Space Standards & Innovation to visualize how often satellites are expected to pass by each other, based on their present positions.
Satellite operators become concerned when their satellites are expected to pass within a kilometer of another spacecraft, given the uncertainty involved in predicting their movement. The data show a significant escalation in close conjunctions involving satellites in the new megaconstellations. ....

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China, Russia, working on weapons that can kill US GPS satellites

The Global Positioning System (GPS) satellites used by the U.S. military are under threat from Chinese and Russian lasers and electronic jammers. Speaking with lawmakers at the House [.] ....

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Sunil Mittal-backed OneWeb launches 36 more satellites - The Hindu BusinessLine

The launch will represent the fourth in a five-launch programme ....

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It's a bird! It's a plane! Better, it's a satellite

The weight of the satellite has no bearing on its speed, which depends only on how far off the surface of the Earth it is positioned. Bring the satellite closer, and it will orbit faster. Send it too high, and it will shoot off into space ....

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Satellite Data May Have Underestimated Global Warming

A new study on climate-tracking satellites suggests our measurements have likely been underestimating the warming of the troposphere (the lowest region of the atmosphere) during the last four decades, which could indicate the global warming that has already happened may be substantially worse than we thought.
The study, published in the
Journal of Climate, shows the satellite data used by scientists to create climate models doesn t meet the basic physics equations that regulate the relationship between temperature and moisture in the air.
This indicates that satellite measurements of the troposphere have either understated or overstated its temperature and moisture, and the data that indicate the least warming might be the least accurate. ....

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