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Category: satellites – Page 51

Researchers from UNSW Sydney have analyzed millions of satellite photos to observe changes in beaches across the Pacific Ocean. The findings, published in Nature Geoscience today (Feb. 10), reveal for the first time how coastlines respond to different phases of the El-Niño-Southern Oscillation (ENSO) cycle.

ENSO is a natural climate phenomenon that causes variations in over the Pacific Ocean. The warming phase, known as El Niño, and the cooling phase, known as La Niña, affect across different coastlines depending on the cycle.

During these periods, can also intensify, shifting sand away from beaches and threatening beachfront homes and habitats. But scientists haven’t been able to study this broadly using conventional coastal monitoring techniques, which have been limited to on-ground observations on just a few beaches.

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New information about an emerging technique that could track microplastics from space has been uncovered by researchers at the University of Michigan. It turns out that satellites are best at spotting soapy or oily residue, and microplastics appear to tag along with that residue.

Microplastics—tiny flecks that can ride ocean currents hundreds or thousands of miles from their point of entry—can harm sea life and , and they’re extremely difficult to track and clean up. However, a 2021 discovery raised the hope that satellites could offer day-by-day timelines of where microplastics enter the water, how they move and where they tend to collect, for prevention and clean-up efforts.

The team noticed that data recorded by the Cyclone Global Navigation Satellite System (CYGNSS), showed less —that is, fewer and smaller waves—in areas of the ocean that contain microplastics, compared to clean areas.

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Space logistics and orbital transportation company D-Orbit launched Starfield, the eighth commercial mission of their proprietary orbital transfer vehicle (OTV) ION Satellite Carrier (ION), and the first one in a midinclination orbit.

The OTV lifted off January 31st, 2023, at 8:15 a.m. PT (16:15 UTC) aboard a Falcon 9 rocket from the Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California, and was successfully deployed 57 minutes later into an approximately 340km altitude and 70-degree inclination orbit.

ION is a versatile and cost-effective OTV designed to precisely deploy satellites and perform orbital demonstrations of third-party payloads hosted onboard. After the first commercial mission in September 2020, D-Orbit has completed seven more missions, including one featuring two IONs.

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The Space Exploration Technologies Corporation, SpaceX, on Monday announced that it has commenced the operation of Starlink services in Nigeria, the first African country to receive such.

Starlink is a satellite internet constellation operated by SpaceX launched in 2019. It provides satellite internet access coverage to about 46 countries, which is also targeting the global mobile phone service after 2023.

“Starlink is now available in Nigeria – the first African country to receive service!” a tweet posted on the official page of the satellite firm read.

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Here’s some interesting SpaceX News!

For the last few months, SpaceX has been having trouble launching Starlink satellites, once going almost two months between Starlink launches. The problem wasn’t that SpaceX was launching less often, but that SpaceX had a surge in business. The long-term solution was to go from 61 launches last year to about 100 launches this year. (SpaceX only did 31 launches in 2021, so they are growing rapidly!)

This month was much better for Starlink launches, with 3 this month. The key to squeezing in 3 launches was that SpaceX did 7 launches this month which is a 7 12 = 84 launch rate, definitely higher than last’s years 61 launch rate.

Wright’s Law aims to provide a reliable research framework for forecasting cost declines as a function of cumulative production.

Continue reading “What Is Wright’s Law” | >

For years the dream of competition in the world of home internet has been just that; a dream. Now in 2023, we are starting to see it become a reality. Wireless internet from places like T-Mobile and Verizon has come on strong recently. New faster satellite internet from SpaceX, and fiber internet have all expanded recently, meaning many Americans who may have had two options in the past now have 4 or 5 options.

Now Amazon wants to join that list by offering high speed internet from space, similar to SpaceX’s Starlink service.

Here is everything we know about Amazon’s new home internet service:

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Fiber-optic cables stretch across oceans and wind their way underground to handle our communications systems, and scientists think that this vast network of infrastructure could be put to another use: observing Earth’s surface from below.

Specifically, the 1.2 million kilometers (more than 745,000 miles) of existing fiber-optic cable could be combined with satellites and other remote sensing instruments to monitor the entire globe in real time.

Storms and earthquakes could be tracked in this way, the team behind the idea suggests, as well as ships and whales passing through the seas. The network might even have the potential to be used to spot broken pipelines.

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It has been believed that Hall thrusters, an efficient kind of electric propulsion widely used in orbit, must be large to produce a lot of thrust. Now, a new study from the University of Michigan suggests that smaller Hall thrusters can generate much more thrust—potentially making them candidates for interplanetary missions.

“People had previously thought that you could only push a certain amount of current through a thruster area, which in turn translates directly into how much force or thrust you can generate per unit area,” said Benjamin Jorns, U-M associate professor of who led the new Hall thruster study to be presented at the AIAA SciTech Forum in National Harbor, Maryland, today.

His team challenged this limit by running a 9 kilowatt Hall thruster up to 45 kilowatts, maintaining roughly 80% of its nominal efficiency. This increased the amount of force generated per unit area by almost a factor of 10.

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A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch that connects a resistor to an antenna. No need to send power to the antenna.

Our system, combined with techniques for harvesting energy from the environment, could lead to all manner of devices that transmit data, including and implanted , without needing batteries or other power sources. These include sensors for smart agriculture, electronics implanted in the body that never need battery changes, better contactless credit cards and maybe even new ways for satellites to communicate.

Apart from the energy needed to flip the switch, no other energy is needed to transmit the information. In our case, the switch is a transistor, an electrically controlled switch with no moving parts that consumes a minuscule amount of power.

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